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1190
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* OS/2 thread management routines for SDL */
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29
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30 #include <stdio.h>
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31 #include <stdlib.h>
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32 #include <process.h>
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33 #define INCL_DOSERRORS
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34 #define INCL_DOSPROCESS
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35 #include <os2.h>
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36
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37 #include "SDL_error.h"
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38 #include "SDL_thread.h"
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39 #include "SDL_systhread.h"
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40
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41 typedef struct ThreadStartParms
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42 {
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43 void *args;
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44 pfnSDL_CurrentEndThread pfnCurrentEndThread;
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45 } tThreadStartParms, *pThreadStartParms;
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46
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47 static void threadfunc(void *pparm)
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48 {
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49 pThreadStartParms pThreadParms = pparm;
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50 pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
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51
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52 // Call the thread function!
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53 SDL_RunThread(pThreadParms->args);
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54
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55 // Get the current endthread we have to use!
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56 if (pThreadParms)
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57 {
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58 pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
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59 free(pThreadParms);
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60 }
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61 // Call endthread!
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62 if (pfnCurrentEndThread)
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63 (*pfnCurrentEndThread)();
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64 }
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65
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66 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
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67 {
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68 pThreadStartParms pThreadParms = malloc(sizeof(tThreadStartParms));
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69 if (!pThreadParms)
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70 {
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71 SDL_SetError("Not enough memory to create thread");
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72 return(-1);
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73 }
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74
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75 // Save the function which we will have to call to clear the RTL of calling app!
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76 pThreadParms->pfnCurrentEndThread = pfnEndThread;
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77 // Also save the real parameters we have to pass to thread function
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78 pThreadParms->args = args;
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79 // Start the thread using the runtime library of calling app!
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80 thread->threadid = thread->handle = (*pfnBeginThread)(threadfunc, 512*1024, pThreadParms);
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81 if (thread->threadid<=0)
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82 {
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83 SDL_SetError("Not enough resources to create thread");
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84 return(-1);
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85 }
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86 return(0);
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87 }
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88
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89 void SDL_SYS_SetupThread(void)
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90 {
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91 return;
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92 }
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93
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94 DECLSPEC Uint32 SDLCALL SDL_ThreadID(void)
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95 {
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96 PTIB tib;
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97 DosGetInfoBlocks(&tib, NULL);
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98 return((Uint32) (tib->tib_ptib2->tib2_ultid));
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99 }
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100
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101 void SDL_SYS_WaitThread(SDL_Thread *thread)
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102 {
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103 TID tid = thread->handle;
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104 DosWaitThread(&tid, DCWW_WAIT);
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105 }
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106
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107 /* WARNING: This function is really a last resort.
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108 * Threads should be signaled and then exit by themselves.
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109 * TerminateThread() doesn't perform stack and DLL cleanup.
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110 */
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111 void SDL_SYS_KillThread(SDL_Thread *thread)
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112 {
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113 DosKillThread(thread->handle);
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114 }
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