include/SDL_atomic.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 10 Jun 2009 13:38:19 +0000
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child 3199 3e1bf2b8bd81
permissions -rw-r--r--
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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 */
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/**
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 * \file SDL_atomic.h
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 *
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 * Atomic int and pointer magic
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 */
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#ifndef _SDL_atomic_h_
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#define _SDL_atomic_h_
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#include "SDL_stdinc.h"
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#include "SDL_platform.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/* indent is really bad at handling assembly */
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/* *INDENT-OFF* */
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#if defined(__GNUC__) && (defined(i386) || defined(__i386__)  || defined(__x86_64__))
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static __inline__ void
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SDL_atomic_int_add(volatile int* atomic, int value)
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{
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  __asm__ __volatile__("lock;"
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                       "addl %1, %0"
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                       : "=m" (*atomic)
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                       : "ir" (value),
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                         "m" (*atomic));
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}
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static __inline__ int
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SDL_atomic_int_xchg_add(volatile int* atomic, int value)
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{                                              
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  int rv;                                    
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  __asm__ __volatile__("lock;"               
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                       "xaddl %0, %1"        
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                       : "=r" (rv),          
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                         "=m" (*atomic)    
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                       : "0" (value),        
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                         "m" (*atomic));   
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  return rv;                                        
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}
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static __inline__ SDL_bool
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SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
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{
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  int rv;                                                      
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  __asm__ __volatile__("lock;"                               
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                       "cmpxchgl %2, %1"                     
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                       : "=a" (rv),                          
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                         "=m" (*atomic)             
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                       : "r" (newvalue),                     
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                         "m" (*atomic),                    
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                         "0" (oldvalue));
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  return (SDL_bool)(rv == oldvalue);                                          
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}
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  void* rv;
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  __asm__ __volatile__("lock;"
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# if defined(__x86_64__)                       
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                       "cmpxchgq %q2, %1"
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# else
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                       "cmpxchgl %2, %1"
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# endif                       
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                       : "=a" (rv),
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                         "=m" (*atomic)
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                       : "r" (newvalue),
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                         "m" (*atomic),
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                         "0" (oldvalue));
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  return (SDL_bool)(rv == oldvalue);
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}
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#elif defined(__GNUC__) && defined(__alpha__)
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# define ATOMIC_MEMORY_BARRIER (__asm__ __volatile__ ("mb" : : : "memory"))
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# define ATOMIC_INT_CMP_XCHG(atomic,value)              \
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  ({                                                    \
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    int rv,prev;                                        \
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    __asm__ __volatile__("   mb\n"                      \
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                         "1: ldl_l   %0,%2\n"           \
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                         "   cmpeq   %0,%3,%1\n"        \
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                         "   beq     %1,2f\n"           \
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                         "   mov     %4,%1\n"           \
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                         "   stl_c   %1,%2\n"           \
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                         "   beq     %1,1b\n"           \
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                         "   mb\n"                      \
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                         "2:"                           \
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                         : "=&r" (prev),                \
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                           "=&r" (rv)                   \
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                         : "m" (*(atomic)),             \
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                           "Ir" (oldvalue),             \
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                           "Ir" (newvalue)              \
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                         : "memory");                   \
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    (rv != 0);                                          \
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  })
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# if (SIZEOF_VOIDP == 4)
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  int rv;
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  void* prev;
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  __asm__ __volatile__("   mb\n"
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                       "1: ldl_l %0,%2\n"
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                       "   cmpeq %0,%3,%1\n"
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                       "   beq   $1,2f\n"
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                       "   mov   %4,%1\n"
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                       "   stl_c %1,%2\n"
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                       "   beq   %1,1b\n"
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                       "   mb\n"
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                       "2:"
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                       : "=&r" (prev),
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                         "=&r" (rv)
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                       : "m" (*atomic),
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                         "Ir" (oldvalue),
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                         "Ir" (newvalue)
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                       : "memory");
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  return (SDL_bool)(rv != 0);
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}
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# elif (SIZEOF_VOIDP == 8)
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  int rv;
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  void* prev;
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  __asm__ __volatile__("   mb\n"
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                       "1: ldq_l %0,%2\n"
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                       "   cmpeq %0,%3,%1\n"
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                       "   beq   %1,2f\n"
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                       "   mov   %4,%1\n"
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                       "   stq_c %1,%2\n"
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                       "   beq   %1,1b\n"
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                       "   mb\n"
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                       "2:"
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                       : "=&r" (prev),
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                         "=&r" (rv)
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                       : "m" (*atomic),
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                         "Ir" (oldvalue),
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                         "Ir" (newvalue)
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                       : "memory");
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  return (SDL_bool)(rv != 0);
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}
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# else
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#  error "Your system has an unsupported pointer size"  
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# endif  /* SIZEOF_VOIDP */
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#elif defined(__GNUC__) && defined(__sparc__)
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# define ATOMIC_MEMORY_BARRIER                                          \
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  (__asm__ __volatile__("membar #LoadLoad | #LoadStore"                 \
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                        " | #StoreLoad | #StoreStore" : : : "memory"))
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# define ATOMIC_INT_CMP_XCHG(atomic,oldvalue,newvalue)                  \
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  ({                                                                    \
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    int rv;                                                             \
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    __asm__ __volatile__("cas [%4], %2, %0"                             \
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                         : "=r" (rv), "=m" (*(atomic))                  \
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                         : "r" (oldvalue), "m" (*(atomic)),             \
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                         "r" (atomic), "0" (newvalue));                 \
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    rv == oldvalue;                                                     \
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  })
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# if (SIZEOF_VOIDP == 4)
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  void* rv;
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  __asm__ __volatile__("cas [%4], %2, %0"
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                       : "=r" (rv),
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                         "=m" (*atomic)
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                       : "r" (oldvalue),
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                         "m" (*atomic),
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                         "r" (atomic),
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                         "0" (newvalue));
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  return (SDL_bool)(rv == oldvalue);
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}
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# elif (SIZEOF_VOIDP == 8)
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  void* rv;
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  void** a = atomic;
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  __asm__ __volatile__("casx [%4], %2, %0"
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                       : "=r" (rv),
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                         "=m" (*a)
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                       : "r" (oldvalue),
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                         "m" (*a),
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                         "r" (a),
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                         "0" (newvalue));
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  return (SDL_bool)(rv == oldvalue);
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}
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# else
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#  error "Your system has an unsupported pointer size"
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# endif /* SIZEOF_VOIDP */
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#elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) || defined(_M_PPC))
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# define ATOMIC_MEMORY_BARRIER \
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  (__asm__ __volatile__ ("sync" : : : "memory"))
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static __inline__ void
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SDL_atomic_int_add(volatile int* atomic, int value)
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{                                           
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  int rv,tmp;                                   
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  __asm__ __volatile__("1: lwarx   %0,  0, %3\n" 
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                       "   add     %1, %0, %4\n"
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                       "   stwcx.  %1,  0, %3\n" 
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                       "   bne-    1b"          
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                       : "=&b" (rv),            
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                         "=&r" (tmp),           
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                         "=m" (*atomic)       
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                       : "b" (atomic),          
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                         "r" (value),           
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                         "m" (*atomic)        
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                       : "cr0",                 
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                         "memory");             
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}
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static __inline__ int
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SDL_atomic_int_xchg_add(volatile int* atomic, int value)
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{                                          
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  int rv,tmp;                               
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  __asm__ __volatile__("1: lwarx  %0, 0, %3\n"        
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                       "   add    %1, %0, %4\n"       
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                       "   stwcx. %1, 0, %3\n"        
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                       "   bne-   1b"                 
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                       : "=&b" (rv),                  
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                         "=&r" (tmp),                 
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                         "=m" (*atomic)
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                       : "b" (atomic),                
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                         "r" (value),                 
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                         "m" (*atomic)
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                       : "cr0",                       
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                       "memory");                   
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  return rv;                                                 
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}
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# if (SIZEOF_VOIDP == 4)
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static __inline__ SDL_bool
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SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
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{                                                        
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  int rv;                                                 
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  __asm__ __volatile__("   sync\n"                         
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                       "1: lwarx   %0, 0, %1\n"           
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                       "   subf.   %0, %2, %0\n"          
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                       "   bne     2f\n"                  
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                       "   stwcx.  %3, 0, %1\n"           
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                       "   bne-    1b\n"                  
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                       "2: isync"                         
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                       : "=&r" (rv)                       
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                       : "b" (atomic),                    
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                         "r" (oldvalue),                  
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                         "r"                              
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                       : "cr0",                           
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                         "memory");                         
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  return (SDL_bool)(rv == 0);                                              
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}
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  void* rv;
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  __asm__ __volatile__("sync\n"
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                       "1: lwarx  %0,  0, %1\n"
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                       "   subf.  %0, %2, %0\n"
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                       "   bne    2f\n"
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                       "   stwcx. %3,  0, %1\n"
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                       "   bne-   1b\n"
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                       "2: isync"
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                       : "=&r" (rv)
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                       : "b" (atomic),
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                         "r" (oldvalue),
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                         "r" (newvalue)
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                       : "cr0",
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                       "memory");
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  return (SDL_bool)(rv == 0);
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}
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# elif (SIZEOF_VOIDP == 8)
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static __inline__ SDL_bool
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SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
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{                                                        
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  int rv;                                                 
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  __asm__ __volatile__("   sync\n"                         
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                       "1: lwarx   %0,  0, %1\n"
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                       "   extsw   %0, %0\n"
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                       "   subf.   %0, %2, %0\n"          
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                       "   bne     2f\n"                  
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                       "   stwcx.  %3,  0, %1\n"           
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                       "   bne-    1b\n"                  
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                       "2: isync"                         
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                       : "=&r" (rv)                       
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                       : "b" (atomic),                    
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                         "r" (oldvalue),                  
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                         "r"                              
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                       : "cr0",                           
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                         "memory");                         
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  return (SDL_bool)(rv == 0);                                              
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}
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static __inline__ SDL_bool
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SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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{
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  void* rv;
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  __asm__ __volatile__("sync\n"
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                       "1: ldarx  %0,  0, %1\n"
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                       "   subf.  %0, %2, %0\n"
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                       "   bne    2f\n"
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                       "   stdcx. %3,  0, %1\n"
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   332
                       "   bne-   1b\n"
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   333
                       "2: isync"
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                       : "=&r" (rv)
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                       : "b" (atomic),
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   336
                         "r" (oldvalue),
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                         "r" (newvalue)
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                       : "cr0",
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   339
                       "memory");
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  return (SDL_bool)(rv == 0);
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}
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# else
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#  error "Your system has an unsupported pointer size"
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# endif /* SIZEOF_VOIDP */
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#elif defined(__GNUC__) && (defined(__IA64__) || defined(__ia64__))
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# define ATOMIC_MEMORY_BARRIER (__sync_synchronize())
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# define SDL_atomic_int_xchg_add(atomic, value)     \
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  (__sync_fetch_and_add((atomic),(value)))
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# define SDL_atomic_int_add(atomic, value)                  \
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  ((void)__sync_fetch_and_add((atomic),(value)))
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# define SDL_atomic_int_cmp_xchg(atomic,oldvalue,newvalue)  \
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  (__sync_bool_compare_and_swap((atomic),(oldvalue),(newvalue)))
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# define SDL_atomic_ptr_cmp_xchg(atomic,oldvalue,newvalue)              \
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  (__sync_bool_compare_and_swap((long*)(atomic),(long)(oldvalue),(long)(newvalue)))
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#elif defined(__GNUC__) && defined(__LINUX__) && (defined(__mips__) || defined(__MIPS__))
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static __inline__ int
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SDL_atomic_int_xchg_add(volatile int* atomic, int value)
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{                                            
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  int rv,tmp;                                 
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  __asm__ __volatile__("1:              \n"                 
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   361
                       ".set  push      \n"         
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   362
                       ".set  mips2     \n"        
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   363
                       "ll    %0,%3     \n"        
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   364
                       "addu  %1,%4,%0  \n"     
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   365
                       "sc    %1,%2     \n"        
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   366
                       ".set  pop       \n"          
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                       "beqz  %1,1b     \n"        
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                       : "=&r" (rv),          
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   369
                         "=&r" (tmp),         
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                         "=m" (*atomic)     
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   371
                       : "m" (*atomic),     
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   372
                         "r" (value)          
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   373
                       : "memory");           
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  return rv;                                         
3180
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   375
}
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   376
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   377
static __inline__ void
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SDL_atomic_int_add(volatile int* atomic, int value)
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   379
{                                           
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   380
  int rv;                                    
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  __asm__ __volatile__("1:               \n"                
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   382
                       ".set  push       \n"        
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   383
                       ".set  mips2      \n"       
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   384
                       "ll    %0,%2      \n"       
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   385
                       "addu  %0,%3,%0   \n"    
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   386
                       "sc    %0,%1      \n"       
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   387
                       ".set  pop        \n"         
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                       "beqz  %0,1b      \n"       
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   389
                       : "=&r" (rv),         
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                         "=m" (*atomic)    
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   391
                       : "m" (*atomic),    
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   392
                         "r" (value)         
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   393
                       : "memory");          
3180
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   394
}
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   395
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   396
static __inline__ SDL_bool
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   397
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
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   398
{
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   399
  int rv;
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   400
  __asm__ __volatile__("     .set push        \n"
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   401
                       "     .set noat        \n"
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   402
                       "     .set mips3       \n"
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   403
                       "1:   ll   %0, %2      \n"
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   404
                       "     bne  %0, %z3, 2f \n"
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   405
                       "     .set mips0       \n"
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   406
                       "     move $1, %z4     \n"
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   407
                       "     .set mips3       \n"
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   408
                       "     sc   $1, %1      \n"
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   409
                       "     beqz $1, 1b      \n"
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   410
                       "     sync             \n"
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   411
                       "2:                    \n"
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   412
                       "     .set pop         \n"
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   413
                       : "=&r" (rv),
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   414
                         "=R" (*atomic)
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   415
                       : "R" (*atomic),
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   416
                         "Jr" (oldvalue),
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   417
                         "Jr" (newvalue)
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   418
                       : "memory");
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   419
  return (SDL_bool)rv;                  
3180
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   420
}
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   421
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   422
static __inline__ SDL_bool
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   423
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
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   424
{                                                     
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Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   425
  int rv;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   426
  __asm__ __volatile__("     .set push        \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   427
                       "     .set noat        \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   428
                       "     .set mips3       \n"
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   429
# if defined(__mips64)
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   430
                       "1:   lld  %0, %2      \n"
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   431
# else
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   432
                       "1:   ll   %0, %2      \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   433
# endif                       
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   434
                       "     bne  %0, %z3, 2f \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   435
                       "     move $1, %z4     \n"
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   436
# if defined(__mips64)
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   437
                       "     sc   $1, %1      \n"
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   438
# else
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   439
                       "     scd  $1, %1      \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   440
# endif                       
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   441
                       "     beqz $1, 1b      \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   442
                       "     sync             \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   443
                       "2:                    \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   444
                       "     .set pop         \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   445
                       : "=&r" (rv),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   446
                         "=R" (*atomic)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   447
                       : "R" (*atomic),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   448
                         "Jr" (oldvalue),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   449
                         "Jr" (newvalue)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   450
                       : "memory");
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   451
  return (SDL_bool)rv;                                                  
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   452
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   453
#elif defined(__GNUC__) && defined(__m68k__)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   454
static __inline__ int
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   455
SDL_atomic_int_xchg_add(volatile int* atomic, int value)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   456
{                                          
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   457
  int rv = *atomic;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   458
  int tmp;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   459
  __asm__ __volatile__("1: move%.l %0,%1    \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   460
                       "   add%.l  %2,%1    \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   461
                       "   cas%.l  %0,%1,%3 \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   462
                       "   jbne    1b       \n"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   463
                       : "=d" (rv),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   464
                         "=&d" (tmp)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   465
                       : "d" (value),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   466
                         "m" (*atomic),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   467
                         "0" (rv)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   468
                       : "memory");
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   469
  return (SDL_bool)rv;
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   470
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   471
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   472
static __inline__ void
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   473
SDL_atomic_int_add(volatile int* atomic, int value)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   474
{                                           
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   475
  __asm__ __volatile__("add%.l %0,%1"        
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   476
                       :                     
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   477
                       : "id" (value),       
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   478
                         "m" (*atomic)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   479
                       : "memory");          
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   480
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   481
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   482
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   483
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   484
{                                           
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   485
  char rv;                                   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   486
  int readvalue;                             
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   487
  __asm__ __volatile__("cas%.l %2,%3,%1\n"   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   488
                       "seq    %0"           
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   489
                       : "=dm" (rv),         
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   490
                         "=m" (*atomic),   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   491
                         "=d" (readvalue)    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   492
                       : "d" (newvalue),     
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   493
                         "m" (*atomic),    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   494
                         "2" (oldvalue));    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   495
    return (SDL_bool)rv;                                        
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   496
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   497
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   498
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   499
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   500
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   501
  char rv;                                   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   502
  int readvalue;                             
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   503
  __asm__ __volatile__("cas%.l %2,%3,%1\n"   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   504
                       "seq    %0"           
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   505
                       : "=dm" (rv),         
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   506
                         "=m" (*atomic),   
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   507
                         "=d" (readvalue)    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   508
                       : "d" (newvalue),     
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   509
                         "m" (*atomic),    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   510
                         "2" (oldvalue));    
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   511
    return (SDL_bool)rv;                                        
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   512
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   513
#elif defined(__GNUC__) && defined(__s390__)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   514
# define ATOMIC_INT_CMP_XCHG(atomic,oldvalue,newvalue)  \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   515
  ({                                                    \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   516
    int rv = oldvalue;                                  \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   517
    __asm__ __volatile__("cs %0, %2, %1"                \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   518
                         : "+d" (rv),                   \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   519
                           "=Q" (*(atomic))             \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   520
                         : "d" (newvalue),              \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   521
                           "m" (*(atomic))              \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   522
                         : "cc");                       \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   523
    rv == oldvalue;                                     \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   524
  })
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   525
# if (SIZEOF_VOIDP == 4)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   526
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   527
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   528
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   529
  void* rv = oldvalue;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   530
  __asm__ __volatile__("cs %0, %2, %1"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   531
                       : "+d" (rv),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   532
                         "=Q" (*atomic)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   533
                       : "d" (newvalue),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   534
                         "m" (*atomic)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   535
                       : "cc");
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   536
  return (SDL_bool)(rv == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   537
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   538
# elif (SIZEOF_VOIDP == 8)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   539
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   540
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   541
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   542
  void* rv = oldvalue;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   543
  void** a = atomic;
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   544
  __asm__ __volatile__("csg %0, %2, %1"
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   545
                       : "+d" (rv),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   546
                         "=Q" (*a)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   547
                       : "d" ((long)(newvalue)),
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   548
                         "m" (*a)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   549
                       : "cc");
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   550
  return (SDL_bool)(rv == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   551
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   552
# else
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   553
#  error "Your system has an unsupported pointer size"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   554
# endif /* SIZEOF_VOIDP */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   555
#elif defined(__WIN32__)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   556
# include <windows.h>
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   557
static __inline__ int
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   558
SDL_atomic_int_xchg_add(volatile int* atomic, int value)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   559
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   560
  return InterlockedExchangeAdd(atomic, value);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   561
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   562
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   563
static __inline__ void
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   564
SDL_atomic_int_add(volatile int* atomic, int value)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   565
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   566
  InterlockedExchangeAdd(atomic, value);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   567
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   568
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   569
# if (WINVER > 0X0400)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   570
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   571
SDL_atmoic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   572
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   573
   return (SDL_bool)(InterlockedCompareExchangePointer((PVOID*)atomic,
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   574
                                                       (PVOID)newvalue,
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   575
                                                       (PVOID)oldvalue) == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   576
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   577
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   578
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   579
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   580
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   581
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   582
  return (InterlockedCompareExchangePointer(atomic, newvalue, oldvalue) == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   583
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   584
# else /* WINVER <= 0x0400 */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   585
#  if (SIZEOF_VOIDP != 4)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   586
#   error "InterlockedCompareExchangePointer needed"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   587
#  endif
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   588
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   589
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   590
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   591
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   592
  return (InterlockedCompareExchange(atomic, newvalue, oldvalue) == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   593
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   594
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   595
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   596
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   597
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   598
  return (InterlockedCompareExchange(atomic, newvalue, oldvalue) == oldvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   599
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   600
# endif
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   601
#else /* when all else fails */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   602
# define SDL_ATOMIC_OPS_NOT_SUPPORTED
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   603
# warning "Atomic Ops for this platform not supported!"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   604
static __inline__ int
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   605
SDL_atomic_int_xchg_add(volatile int* atomic, int value)
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   606
{                                           
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   607
  int rv = *atomic;                          
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   608
  *(atomic) += value;                        
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   609
  return rv;                                        
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   610
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   611
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   612
static __inline__ SDL_bool
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   613
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   614
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   615
  return (*atomic == oldvalue) ?  
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   616
    ((*atomic = newvalue), SDL_TRUE) : SDL_FALSE;
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   617
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   618
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   619
static __inline__ void
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   620
SDL_atomic_int_add(volatile int* atomic, int value)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   621
{
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   622
  *atomic += value;
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   623
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   624
#endif /* arch & platforms */
3187
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   625
  
e041d2c603fe indent is really bad at handling assembly
Sam Lantinga <slouken@libsdl.org>
parents: 3186
diff changeset
   626
/* *INDENT-ON* */
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   627
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   628
#ifdef ATOMIC_INT_CMP_XCHG
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   629
static __inline__ SDL_bool
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   630
SDL_atomic_int_cmp_xchg(volatile int *atomic, int oldvalue, int newvalue)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   631
{
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   632
    return (SDL_bool) ATOMIC_INT_CMP_XCHG(atomic, oldvalue, newvalue);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   633
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   634
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   635
static __inline__ int
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   636
SDL_atomic_int_xchg_add(volatile int *atomic, int value)
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   637
{
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   638
    int rv;
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   639
    do
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   640
        rv = *atomic;
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   641
    while (!ATOMIC_INT_CMP_XCHG(atomic, rv, rv + value));
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   642
    return rv;
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   643
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   644
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   645
static __inline__ void
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   646
SDL_atomic_int_add(volatile int *atomic, int value)
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   647
{
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   648
    int rv;
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   649
    do
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   650
        rv = *atomic;
Sam Lantinga <slouken@libsdl.org>
parents: 3181
diff changeset
   651
    while (!ATOMIC_INT_CMP_XCHG(atomic, rv, rv + value));
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   652
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   653
#endif /* ATOMIC_CMP_XCHG */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   654
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   655
#ifdef ATOMIC_MEMORY_BARRIER
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   656
# define SDL_atomic_int_get(atomic) \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   657
  (ATOMIC_MEMORY_BARRIER,*(atomic))
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   658
# define SDL_atomic_int_set(atomic,value) \
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   659
  (*(atomic)=value,ATOMIC_MEMORY_BARRIER)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   660
#else
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   661
# define SDL_atomic_int_get(atomic) (*(atomic))
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   662
# define SDL_atomic_int_set(atomic, newvalue) ((void)(*(atomic) = (newvalue)))
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   663
#endif /* MEMORY_BARRIER_NEEDED */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   664
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   665
#define SDL_atomic_int_inc(atomic) (SDL_atomic_int_add((atomic),1))
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   666
#define SDL_atomic_int_dec_test(atomic) (SDL_atomic_int_xchg_add((atomic),-1) == 1)
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   667
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   668
/* Ends C function definitions when using C++ */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   669
#ifdef __cplusplus
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   670
/* *INDENT-OFF* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   671
}
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   672
/* *INDENT-ON* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   673
#endif
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   674
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   675
#include "close_code.h"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   676
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   677
#endif /* _SDL_atomic_h_ */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   678
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
   679
/* vi: set ts=4 sw=4 expandtab: */