author  Bob Pendleton <bob@pendleton.com> 
Tue, 09 Jun 2009 17:33:44 +0000  
changeset 3180  77d6336711fc 
child 3181  030899df1af5 
permissions  rwrr 
3180
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/* 
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SDL  Simple DirectMedia Layer 
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Copyright (C) 19972006 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 021101301 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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/* *INDENTOFF* */ 
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extern "C" { 
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/* *INDENTON* */ 
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#endif 
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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 (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 (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 (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 (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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185 

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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 (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 (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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238 

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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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257 

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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 (rv == 0); 
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} 
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278 

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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 (rv == 0); 
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297 
} 
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298 
# elif (SIZEOF_VOIDP == 8) 
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299 
static __inline__ SDL_bool 
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300 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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301 
{ 
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302 
int rv; 
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303 
__asm__ __volatile__(" sync\n" 
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304 
"1: lwarx %0, 0, %1\n" 
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305 
" extsw %0, %0\n" 
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306 
" subf. %0, %2, %0\n" 
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307 
" bne 2f\n" 
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308 
" stwcx. %3, 0, %1\n" 
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309 
" bne 1b\n" 
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310 
"2: isync" 
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311 
: "=&r" (rv) 
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312 
: "b" (atomic), 
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313 
"r" (oldvalue), 
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314 
"r" 
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315 
: "cr0", 
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316 
"memory"); 
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317 
return (rv == 0); 
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318 
} 
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319 

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320 
static __inline__ SDL_bool 
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321 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
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322 
{ 
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323 
void* rv; 
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324 
__asm__ __volatile__("sync\n" 
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325 
"1: ldarx %0, 0, %1\n" 
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326 
" subf. %0, %2, %0\n" 
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327 
" bne 2f\n" 
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328 
" stdcx. %3, 0, %1\n" 
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329 
" bne 1b\n" 
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330 
"2: isync" 
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331 
: "=&r" (rv) 
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332 
: "b" (atomic), 
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333 
"r" (oldvalue), 
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334 
"r" (newvalue) 
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335 
: "cr0", 
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336 
"memory"); 
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337 
return (rv == 0); 
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338 
} 
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339 
# else 
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340 
# error "Your system has an unsupported pointer size" 
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341 
# endif /* SIZEOF_VOIDP */ 
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342 
#elif defined(__GNUC__) && (defined(__IA64__)  defined(__ia64__)) 
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343 
# define ATOMIC_MEMORY_BARRIER (__sync_synchronize()) 
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344 
# define SDL_atomic_int_xchg_add(atomic, value) \ 
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345 
(__sync_fetch_and_add((atomic),(value))) 
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346 
# define SDL_atomic_int_add(atomic, value) \ 
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347 
((void)__sync_fetch_and_add((atomic),(value))) 
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348 
# define SDL_atomic_int_cmp_xchg(atomic,oldvalue,newvalue) \ 
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349 
(__sync_bool_compare_and_swap((atomic),(oldvalue),(newvalue))) 
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350 
# define SDL_atomic_ptr_cmp_xchg(atomic,oldvalue,newvalue) \ 
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351 
(__sync_bool_compare_and_swap((long*)(atomic),(long)(oldvalue),(long)(newvalue))) 
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352 
#elif defined(__GNUC__) && defined(__LINUX__) && (defined(__mips__)  defined(__MIPS__)) 
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353 
static __inline__ int 
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354 
SDL_atomic_int_xchg_add(volatile int* atomic, int value) 
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355 
{ 
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356 
int rv,tmp; 
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357 
__asm__ __volatile__("1: \n" 
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358 
".set push \n" 
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359 
".set mips2 \n" 
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360 
"ll %0,%3 \n" 
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361 
"addu %1,%4,%0 \n" 
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362 
"sc %1,%2 \n" 
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363 
".set pop \n" 
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364 
"beqz %1,1b \n" 
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365 
: "=&r" (rv), 
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366 
"=&r" (tmp), 
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367 
"=m" (*atomic) 
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368 
: "m" (*atomic), 
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369 
"r" (value) 
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370 
: "memory"); 
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371 
return rv; 
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372 
} 
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373 

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374 
static __inline__ void 
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375 
SDL_atomic_int_add(volatile int* atomic, int value) 
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376 
{ 
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377 
int rv; 
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378 
__asm__ __volatile__("1: \n" 
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379 
".set push \n" 
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380 
".set mips2 \n" 
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381 
"ll %0,%2 \n" 
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382 
"addu %0,%3,%0 \n" 
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383 
"sc %0,%1 \n" 
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384 
".set pop \n" 
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385 
"beqz %0,1b \n" 
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386 
: "=&r" (rv), 
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387 
"=m" (*atomic) 
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388 
: "m" (*atomic), 
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389 
"r" (value) 
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390 
: "memory"); 
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391 
} 
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392 

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393 
static __inline__ SDL_bool 
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394 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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395 
{ 
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396 
int rv; 
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397 
__asm__ __volatile__(" .set push \n" 
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398 
" .set noat \n" 
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399 
" .set mips3 \n" 
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400 
"1: ll %0, %2 \n" 
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401 
" bne %0, %z3, 2f \n" 
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402 
" .set mips0 \n" 
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403 
" move $1, %z4 \n" 
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404 
" .set mips3 \n" 
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405 
" sc $1, %1 \n" 
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406 
" beqz $1, 1b \n" 
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407 
" sync \n" 
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408 
"2: \n" 
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409 
" .set pop \n" 
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410 
: "=&r" (rv), 
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411 
"=R" (*atomic) 
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412 
: "R" (*atomic), 
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413 
"Jr" (oldvalue), 
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414 
"Jr" (newvalue) 
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415 
: "memory"); 
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416 
return (SDL_bool)rv; 
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417 
} 
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418 

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419 
static __inline__ SDL_bool 
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420 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
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421 
{ 
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422 
int rv; 
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423 
__asm__ __volatile__(" .set push \n" 
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424 
" .set noat \n" 
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425 
" .set mips3 \n" 
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426 
# if defined(__mips64) 
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427 
"1: lld %0, %2 \n" 
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428 
# else 
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429 
"1: ll %0, %2 \n" 
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430 
# endif 
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431 
" bne %0, %z3, 2f \n" 
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432 
" move $1, %z4 \n" 
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433 
# if defined(__mips64) 
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434 
" sc $1, %1 \n" 
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435 
# else 
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436 
" scd $1, %1 \n" 
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437 
# endif 
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438 
" beqz $1, 1b \n" 
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439 
" sync \n" 
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440 
"2: \n" 
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441 
" .set pop \n" 
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442 
: "=&r" (rv), 
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443 
"=R" (*atomic) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

444 
: "R" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

445 
"Jr" (oldvalue), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

446 
"Jr" (newvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

447 
: "memory"); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

448 
return (SDL_bool)rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

449 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

450 
#elif defined(__GNUC__) && defined(__m68k__) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

451 
static __inline__ int 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

452 
SDL_atomic_int_xchg_add(volatile int* atomic, int value) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

453 
{ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

454 
int rv = *atomic; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

455 
int tmp; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

456 
__asm__ __volatile__("1: move%.l %0,%1 \n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

457 
" add%.l %2,%1 \n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

458 
" cas%.l %0,%1,%3 \n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

459 
" jbne 1b \n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

460 
: "=d" (rv), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

461 
"=&d" (tmp) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

462 
: "d" (value), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

463 
"m" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

464 
"0" (rv) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

465 
: "memory"); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

466 
return rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

467 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

468 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

469 
static __inline__ void 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

470 
SDL_atomic_int_add(volatile int* atomic, int value) 
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 
__asm__ __volatile__("add%.l %0,%1" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

473 
: 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

474 
: "id" (value), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

475 
"m" (*atomic) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

476 
: "memory"); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

477 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

478 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

479 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

480 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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 
char rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

483 
int readvalue; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

484 
__asm__ __volatile__("cas%.l %2,%3,%1\n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

485 
"seq %0" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

486 
: "=dm" (rv), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

487 
"=m" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

488 
"=d" (readvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

489 
: "d" (newvalue), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

490 
"m" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

491 
"2" (oldvalue)); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

492 
return rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

493 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

494 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

495 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

496 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
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 
char rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

499 
int readvalue; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

500 
__asm__ __volatile__("cas%.l %2,%3,%1\n" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

501 
"seq %0" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

502 
: "=dm" (rv), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

503 
"=m" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

504 
"=d" (readvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

505 
: "d" (newvalue), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

506 
"m" (*atomic), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

507 
"2" (oldvalue)); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

508 
return rv; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

509 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

510 
#elif defined(__GNUC__) && defined(__s390__) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

511 
# define ATOMIC_INT_CMP_XCHG(atomic,oldvalue,newvalue) \ 
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 
int rv = oldvalue; \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

514 
__asm__ __volatile__("cs %0, %2, %1" \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

515 
: "+d" (rv), \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

516 
"=Q" (*(atomic)) \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

517 
: "d" (newvalue), \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

518 
"m" (*(atomic)) \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

519 
: "cc"); \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

520 
rv == oldvalue; \ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

521 
}) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

522 
# if (SIZEOF_VOIDP == 4) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

523 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

524 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

525 
{ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

526 
void* rv = oldvalue; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

527 
__asm__ __volatile__("cs %0, %2, %1" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

528 
: "+d" (rv), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

529 
"=Q" (*atomic) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

530 
: "d" (newvalue), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

531 
"m" (*atomic) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

532 
: "cc"); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

533 
return (rv == oldvalue); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

534 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

535 
# elif (SIZEOF_VOIDP == 8) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

536 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

537 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

538 
{ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

539 
void* rv = oldvalue; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

540 
void** a = atomic; 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

541 
__asm__ __volatile__("csg %0, %2, %1" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

542 
: "+d" (rv), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

543 
"=Q" (*a) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

544 
: "d" ((long)(newvalue)), 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

545 
"m" (*a) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

546 
: "cc"); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

547 
return (rv == oldvalue); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

548 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

549 
# else 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

550 
# error "Your system has an unsupported pointer size" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

551 
# endif /* SIZEOF_VOIDP */ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

552 
#elif defined(__WIN32__) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

553 
# include <windows.h> 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

554 
static __inline__ int 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

555 
SDL_atomic_int_xchg_add(volatile int* atomic, int value) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

556 
{ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

557 
return InterlockedExchangeAdd(atomic, value); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

558 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

559 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

560 
static __inline__ void 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

561 
SDL_atomic_int_add(volatile int* atomic, int value) 
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 
InterlockedExchangeAdd(atomic, value); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

564 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

565 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

566 
# if (WINVER > 0X0400) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

567 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

568 
SDL_atmoic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

569 
{ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

570 
return ((SDL_bool)InterlockedCompareExchangePointer((PVOID*)atomic, 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

571 
(PVOID)newvalue, 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

572 
(PVOID)oldvalue) == oldvalue); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

573 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

574 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

575 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

576 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

577 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
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 
return (InterlockedCompareExchangePointer(atomic, newvalue, oldvalue) == oldvalue); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

580 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

581 
# else /* WINVER <= 0x0400 */ 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

582 
# if (SIZEOF_VOIDP != 4) 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

583 
# error "InterlockedCompareExchangePointer needed" 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

584 
# endif 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

585 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

586 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

587 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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 
return (InterlockedCompareExchange(atomic, newvalue, oldvalue) == oldvalue); 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

590 
} 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

591 

77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

592 
static __inline__ SDL_bool 
77d6336711fc
First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

593 
SDL_atomic_ptr_cmp_xchg(volatile void** atomic, void* oldvalue, void* newvalue) 
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594 
{ 
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595 
return (InterlockedCompareExchange(atomic, newvalue, oldvalue) == oldvalue); 
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596 
} 
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597 
# endif 
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598 
#else /* when all else fails */ 
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599 
# define SDL_ATOMIC_OPS_NOT_SUPPORTED 
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600 
# warning "Atomic Ops for this platform not supported!" 
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601 
static __inline__ int 
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602 
SDL_atomic_int_xchg_add(volatile int* atomic, int value) 
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603 
{ 
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604 
int rv = *atomic; 
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605 
*(atomic) += value; 
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606 
return rv; 
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607 
} 
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parents:
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608 

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609 
static __inline__ SDL_bool 
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610 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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611 
{ 
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612 
return (*atomic == oldvalue) ? 
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613 
((*atomic = newvalue), SDL_TRUE) : SDL_FALSE; 
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614 
} 
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parents:
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615 

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616 
static __inline__ void 
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617 
SDL_atomic_int_add(volatile int* atomic, int value) 
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618 
{ 
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619 
*atomic += value; 
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620 
} 
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621 
#endif /* arch & platforms */ 
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622 

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623 
#ifdef ATOMIC_INT_CMP_XCHG 
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624 
static __inline__ SDL_bool 
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625 
SDL_atomic_int_cmp_xchg(volatile int* atomic, int oldvalue, int newvalue) 
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626 
{ 
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627 
return ATOMIC_INT_CMP_XCHG(atomic,oldvalue,newvalue); 
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628 
} 
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629 

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630 
static __inline__ int 
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631 
SDL_atomic_int_xchg_add(volatile int* atomic, int value) 
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632 
{ 
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633 
int rv; 
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634 
do 
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635 
rv = *atomic; 
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636 
while(!ATOMIC_INT_CMP_XCHG(atomic,rv,rv+value)); 
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637 
return rv; 
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638 
} 
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parents:
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639 

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640 
static __inline__ void 
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641 
SDL_atomic_int_add(volatile int* atomic, int value) 
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642 
{ 
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643 
int rv; 
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644 
do 
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645 
rv = *atomic; 
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646 
while(!ATOMIC_INT_CMP_XCHG(atomic,rv,rv+value)); 
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647 
} 
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parents:
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648 
#endif /* ATOMIC_CMP_XCHG */ 
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parents:
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649 

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650 
#ifdef ATOMIC_MEMORY_BARRIER 
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651 
# define SDL_atomic_int_get(atomic) \ 
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652 
(ATOMIC_MEMORY_BARRIER,*(atomic)) 
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653 
# define SDL_atomic_int_set(atomic,value) \ 
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654 
(*(atomic)=value,ATOMIC_MEMORY_BARRIER) 
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655 
#else 
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656 
# define SDL_atomic_int_get(atomic) (*(atomic)) 
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657 
# define SDL_atomic_int_set(atomic, newvalue) ((void)(*(atomic) = (newvalue))) 
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658 
#endif /* MEMORY_BARRIER_NEEDED */ 
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First commit for SDL atomic operations.
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parents:
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659 

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660 
#define SDL_atomic_int_inc(atomic) (SDL_atomic_int_add((atomic),1)) 
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661 
#define SDL_atomic_int_dec_test(atomic) (SDL_atomic_int_xchg_add((atomic),1) == 1) 
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662 

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663 
/* Ends C function definitions when using C++ */ 
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664 
#ifdef __cplusplus 
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665 
/* *INDENTOFF* */ 
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666 
} 
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parents:
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667 
/* *INDENTON* */ 
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parents:
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668 
#endif 
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parents:
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669 

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670 
#include "close_code.h" 
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671 

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672 
#endif /* _SDL_atomic_h_ */ 
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673 

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674 
/* vi: set ts=4 sw=4 expandtab: */ 