src/thread/win32/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 10 Jul 2006 21:04:37 +0000
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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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#include "SDL_config.h"
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/* Win32 thread management routines for SDL */
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include "SDL_thread.h"
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#include "../SDL_thread_c.h"
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#include "../SDL_systhread.h"
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#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
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#ifndef _WIN32_WCE
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/* We'll use the C library from this DLL */
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#include <process.h>
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#endif
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#if __GNUC__
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typedef unsigned long (__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
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                                                             unsigned
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                                                             (__stdcall *
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                                                              func) (void *),
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                                                             void *arg,
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                                                             unsigned,
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                                                             unsigned
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                                                             *threadID);
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typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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#elif defined(__WATCOMC__)
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/* This is for Watcom targets except OS2 */
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#if __WATCOMC__ < 1240
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#define __watcall
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#endif
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typedef unsigned long (__watcall * pfnSDL_CurrentBeginThread) (void *,
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                                                               unsigned,
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                                                               unsigned
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                                                               (__stdcall *
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                                                                func) (void
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                                                                       *),
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                                                               void *arg,
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                                                               unsigned,
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                                                               unsigned
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                                                               *threadID);
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typedef void (__watcall * pfnSDL_CurrentEndThread) (unsigned code);
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#else
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typedef uintptr_t(__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
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                                                        unsigned (__stdcall *
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                                                                  func) (void
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                                                                         *),
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                                                        void *arg, unsigned,
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                                                        unsigned *threadID);
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typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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#endif
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#endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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typedef struct ThreadStartParms
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{
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    void *args;
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    pfnSDL_CurrentEndThread pfnCurrentEndThread;
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} tThreadStartParms, *pThreadStartParms;
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static unsigned __stdcall
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RunThread(void *data)
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{
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    pThreadStartParms pThreadParms = (pThreadStartParms) data;
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    pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
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    // Call the thread function!
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    SDL_RunThread(pThreadParms->args);
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    // Get the current endthread we have to use!
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    if (pThreadParms) {
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        pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
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        SDL_free(pThreadParms);
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    }
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    // Call endthread!
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    if (pfnCurrentEndThread)
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        (*pfnCurrentEndThread) (0);
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    return (0);
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}
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#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
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int
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SDL_SYS_CreateThread(SDL_Thread * thread, void *args,
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                     pfnSDL_CurrentBeginThread pfnBeginThread,
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                     pfnSDL_CurrentEndThread pfnEndThread)
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{
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#else
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int
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SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
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{
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#ifdef _WIN32_WCE
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    pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
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    pfnSDL_CurrentEndThread pfnEndThread = NULL;
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#else
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    pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
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    pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
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#endif
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#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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    unsigned threadid;
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    pThreadStartParms pThreadParms =
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        (pThreadStartParms) SDL_malloc(sizeof(tThreadStartParms));
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    if (!pThreadParms) {
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        SDL_OutOfMemory();
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        return (-1);
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    }
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    // Save the function which we will have to call to clear the RTL of calling app!
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    pThreadParms->pfnCurrentEndThread = pfnEndThread;
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    // Also save the real parameters we have to pass to thread function
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    pThreadParms->args = args;
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    if (pfnBeginThread) {
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        thread->handle =
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            (SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
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                                              pThreadParms, 0, &threadid);
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    } else {
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        thread->handle =
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            CreateThread(NULL, 0, RunThread, pThreadParms, 0, &threadid);
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    }
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    if (thread->handle == NULL) {
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        SDL_SetError("Not enough resources to create thread");
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        return (-1);
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    }
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    return (0);
0
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}
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void
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SDL_SYS_SetupThread(void)
0
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{
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    return;
0
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}
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Uint32
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SDL_ThreadID(void)
0
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{
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    return ((Uint32) GetCurrentThreadId());
0
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}
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void
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SDL_SYS_WaitThread(SDL_Thread * thread)
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{
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    WaitForSingleObject(thread->handle, INFINITE);
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    CloseHandle(thread->handle);
0
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}
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/* WARNING: This function is really a last resort.
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 * Threads should be signaled and then exit by themselves.
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 * TerminateThread() doesn't perform stack and DLL cleanup.
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 */
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void
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SDL_SYS_KillThread(SDL_Thread * thread)
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{
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    TerminateThread(thread->handle, FALSE);
0
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}
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/* vi: set ts=4 sw=4 expandtab: */