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
slouken@libsdl.org
*/
/* OS/2 thread management routines for SDL */
#include <stdio.h>
#include <stdlib.h>
#include <process.h>
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#include <os2.h>
#include "SDL_error.h"
#include "SDL_thread.h"
#include "SDL_systhread.h"
typedef struct ThreadStartParms
{
void *args;
pfnSDL_CurrentEndThread pfnCurrentEndThread;
} tThreadStartParms, *pThreadStartParms;
static void threadfunc(void *pparm)
{
pThreadStartParms pThreadParms = pparm;
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;
free(pThreadParms);
}
// Call endthread!
if (pfnCurrentEndThread)
(*pfnCurrentEndThread)();
}
int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
{
pThreadStartParms pThreadParms = malloc(sizeof(tThreadStartParms));
if (!pThreadParms)
{
SDL_SetError("Not enough memory to create thread");
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;
// Start the thread using the runtime library of calling app!
thread->threadid = thread->handle = (*pfnBeginThread)(threadfunc, 512*1024, pThreadParms);
if (thread->threadid<=0)
{
SDL_SetError("Not enough resources to create thread");
return(-1);
}
return(0);
}
void SDL_SYS_SetupThread(void)
{
return;
}
DECLSPEC Uint32 SDLCALL SDL_ThreadID(void)
{
PTIB tib;
DosGetInfoBlocks(&tib, NULL);
return((Uint32) (tib->tib_ptib2->tib2_ultid));
}
void SDL_SYS_WaitThread(SDL_Thread *thread)
{
TID tid = thread->handle;
DosWaitThread(&tid, DCWW_WAIT);
}
/* 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)
{
DosKillThread(thread->handle);
}