1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken@libsdl.org 21*/ 22#include "SDL_config.h" 23 24/* OS/2 thread management routines for SDL */ 25 26#include <process.h> 27#define INCL_DOSERRORS 28#define INCL_DOSPROCESS 29#include <os2.h> 30 31#include "SDL_thread.h" 32#include "../SDL_systhread.h" 33#include "../SDL_thread_c.h" 34 35typedef struct ThreadStartParms 36{ 37 void *args; 38 pfnSDL_CurrentEndThread pfnCurrentEndThread; 39} tThreadStartParms, *pThreadStartParms; 40 41static void threadfunc(void *pparm) 42{ 43 pThreadStartParms pThreadParms = pparm; 44 pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL; 45 46 // Call the thread function! 47 SDL_RunThread(pThreadParms->args); 48 49 // Get the current endthread we have to use! 50 if (pThreadParms) 51 { 52 pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread; 53 SDL_free(pThreadParms); 54 } 55 // Call endthread! 56 if (pfnCurrentEndThread) 57 (*pfnCurrentEndThread)(); 58} 59 60int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread) 61{ 62 pThreadStartParms pThreadParms = SDL_malloc(sizeof(tThreadStartParms)); 63 if (!pThreadParms) 64 { 65 SDL_SetError("Not enough memory to create thread"); 66 return(-1); 67 } 68 69 // Save the function which we will have to call to clear the RTL of calling app! 70 pThreadParms->pfnCurrentEndThread = pfnEndThread; 71 // Also save the real parameters we have to pass to thread function 72 pThreadParms->args = args; 73 // Start the thread using the runtime library of calling app! 74 thread->threadid = thread->handle = (*pfnBeginThread)(threadfunc, NULL, 512*1024, pThreadParms); 75 if ((int)thread->threadid <= 0) 76 { 77 SDL_SetError("Not enough resources to create thread"); 78 return(-1); 79 } 80 return(0); 81} 82 83void SDL_SYS_SetupThread(void) 84{ 85 return; 86} 87 88DECLSPEC Uint32 SDLCALL SDL_ThreadID(void) 89{ 90 PTIB tib; 91 DosGetInfoBlocks(&tib, NULL); 92 return((Uint32) (tib->tib_ptib2->tib2_ultid)); 93} 94 95void SDL_SYS_WaitThread(SDL_Thread *thread) 96{ 97 TID tid = thread->handle; 98 DosWaitThread(&tid, DCWW_WAIT); 99} 100 101/* WARNING: This function is really a last resort. 102 * Threads should be signaled and then exit by themselves. 103 * TerminateThread() doesn't perform stack and DLL cleanup. 104 */ 105void SDL_SYS_KillThread(SDL_Thread *thread) 106{ 107 DosKillThread(thread->handle); 108} 109