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SDL_systhread.c
115 lines (98 loc) · 3.2 KB
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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
*/
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#include "SDL_config.h"
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/* OS/2 thread management routines for SDL */
#include <process.h>
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#include <os2.h>
#include "SDL_thread.h"
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#include "../SDL_systhread.h"
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#include "../SDL_thread_c.h"
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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 void
threadfunc(void *pparm)
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{
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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;
SDL_free(pThreadParms);
}
// Call endthread!
if (pfnCurrentEndThread)
(*pfnCurrentEndThread) ();
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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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{
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pThreadStartParms pThreadParms = SDL_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, NULL, 512 * 1024, pThreadParms);
if ((int) thread->threadid <= 0) {
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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return;
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}
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DECLSPEC Uint32 SDLCALL
SDL_ThreadID(void)
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{
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PTIB tib;
DosGetInfoBlocks(&tib, NULL);
return ((Uint32) (tib->tib_ptib2->tib2_ultid));
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}
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void
SDL_SYS_WaitThread(SDL_Thread * thread)
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{
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TID tid = thread->handle;
DosWaitThread(&tid, DCWW_WAIT);
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}
/* 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.
*/
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void
SDL_SYS_KillThread(SDL_Thread * thread)
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{
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DosKillThread(thread->handle);
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}
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/* vi: set ts=4 sw=4 expandtab: */