src/thread/win32/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 06 Mar 2006 07:42:36 +0000
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child 1659 14717b52abc0
permissions -rw-r--r--
Enabled libc support on Win32, so we don't break binary compatibility in 1.2
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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 (__stdcall *func)(void *), void *arg, 
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        unsigned, unsigned *threadID);
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typedef void (__cdecl *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 *func)(void *), void *arg, 
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        unsigned, 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 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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  {
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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 SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
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{
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#else
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int 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 = (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 = (SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
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				pThreadParms, 0, &threadid);
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	} else {
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		thread->handle = 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);
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}
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void SDL_SYS_SetupThread(void)
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{
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	return;
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}
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Uint32 SDL_ThreadID(void)
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{
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	return((Uint32)GetCurrentThreadId());
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}
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void 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);
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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 SDL_SYS_KillThread(SDL_Thread *thread)
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{
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	TerminateThread(thread->handle, FALSE);
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}