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SDL_systhread.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 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,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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
License along with this library; if not, write to the Free Software
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 */
#include "SDL_thread.h"
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#include "../SDL_thread_c.h"
#include "../SDL_systhread.h"
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#include "SDL_systhread_c.h"
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#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
#ifndef _WIN32_WCE
/* We'll use the C library from this DLL */
#include <process.h>
#endif
#if __GNUC__
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typedef uintptr_t (__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
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unsigned
(__stdcall *
func) (void *),
void *arg,
unsigned,
unsigned
*threadID);
typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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#elif defined(__WATCOMC__)
/* This is for Watcom targets except OS2 */
#if __WATCOMC__ < 1240
#define __watcall
#endif
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typedef unsigned long (__watcall * pfnSDL_CurrentBeginThread) (void *,
unsigned,
unsigned
(__stdcall *
func) (void
*),
void *arg,
unsigned,
unsigned
*threadID);
typedef void (__watcall * pfnSDL_CurrentEndThread) (unsigned code);
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typedef uintptr_t(__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned (__stdcall *
func) (void
*),
void *arg, unsigned,
unsigned *threadID);
typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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#endif
#endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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typedef struct ThreadStartParms
{
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void *args;
pfnSDL_CurrentEndThread pfnCurrentEndThread;
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} tThreadStartParms, *pThreadStartParms;
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static DWORD __stdcall
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RunThread(void *data)
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pThreadStartParms pThreadParms = (pThreadStartParms) data;
pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
// Call the thread function!
SDL_RunThread(pThreadParms->args);
// Get the current endthread we have to use!
if (pThreadParms) {
pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
SDL_free(pThreadParms);
}
// Call endthread!
if (pfnCurrentEndThread)
(*pfnCurrentEndThread) (0);
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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int
SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
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{
#ifdef _WIN32_WCE
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pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
pfnSDL_CurrentEndThread pfnEndThread = NULL;
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pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
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#endif
#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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unsigned threadid;
pThreadStartParms pThreadParms =
(pThreadStartParms) SDL_malloc(sizeof(tThreadStartParms));
if (!pThreadParms) {
SDL_OutOfMemory();
return (-1);
}
// Save the function which we will have to call to clear the RTL of calling app!
pThreadParms->pfnCurrentEndThread = pfnEndThread;
// Also save the real parameters we have to pass to thread function
pThreadParms->args = args;
if (pfnBeginThread) {
thread->handle =
(SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
pThreadParms, 0, &threadid);
} else {
thread->handle =
CreateThread(NULL, 0, RunThread, pThreadParms, 0, &threadid);
}
if (thread->handle == NULL) {
SDL_SetError("Not enough resources to create thread");
return (-1);
}
return (0);
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}
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void
SDL_SYS_SetupThread(void)
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{
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}
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SDL_threadID
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SDL_ThreadID(void)
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{
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return ((SDL_threadID) GetCurrentThreadId());
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}
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SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
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if (priority == SDL_THREAD_PRIORITY_LOW) {
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value = THREAD_PRIORITY_LOWEST;
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} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
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value = THREAD_PRIORITY_HIGHEST;
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} else {
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value = THREAD_PRIORITY_NORMAL;
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if (!SetThreadPriority(GetCurrentThread(), value)) {
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WIN_SetError("SetThreadPriority()");
return -1;
}
return 0;
}
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void
SDL_SYS_WaitThread(SDL_Thread * thread)
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{
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WaitForSingleObject(thread->handle, INFINITE);
CloseHandle(thread->handle);
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}
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/* vi: set ts=4 sw=4 expandtab: */