SDL_systhread.c
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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,
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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*/
/* Win32 thread management routines for SDL */
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#include "SDL_windows.h"
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#include "SDL_stdlib.h"
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#include "SDL_error.h"
#include "SDL_thread.h"
#include "SDL_systhread.h"
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typedef struct ThreadStartParms
{
void *args;
pfnSDL_CurrentEndThread pfnCurrentEndThread;
} tThreadStartParms, *pThreadStartParms;
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static unsigned __stdcall 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;
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SDL_free(pThreadParms);
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}
// Call endthread!
if (pfnCurrentEndThread)
(*pfnCurrentEndThread)(0);
return(0);
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}
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int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
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unsigned threadid;
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pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
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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);
}
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if (thread->handle == NULL) {
SDL_SetError("Not enough resources to create thread");
return(-1);
}
return(0);
}
void SDL_SYS_SetupThread(void)
{
return;
}
Uint32 SDL_ThreadID(void)
{
return((Uint32)GetCurrentThreadId());
}
void SDL_SYS_WaitThread(SDL_Thread *thread)
{
WaitForSingleObject(thread->handle, INFINITE);
CloseHandle(thread->handle);
}
/* WARNING: This function is really a last resort.
* Threads should be signaled and then exit by themselves.
* TerminateThread() doesn't perform stack and DLL cleanup.
*/
void SDL_SYS_KillThread(SDL_Thread *thread)
{
TerminateThread(thread->handle, FALSE);
}