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
35 typedef struct ThreadStartParms
36 {
37 void *args;
38 pfnSDL_CurrentEndThread pfnCurrentEndThread;
39 } tThreadStartParms, *pThreadStartParms;
40
threadfunc(void * pparm)41 static 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
SDL_SYS_CreateThread(SDL_Thread * thread,void * args,pfnSDL_CurrentBeginThread pfnBeginThread,pfnSDL_CurrentEndThread pfnEndThread)60 int 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
SDL_SYS_SetupThread(void)83 void SDL_SYS_SetupThread(void)
84 {
85 return;
86 }
87
SDL_ThreadID(void)88 DECLSPEC Uint32 SDLCALL SDL_ThreadID(void)
89 {
90 PTIB tib;
91 DosGetInfoBlocks(&tib, NULL);
92 return((Uint32) (tib->tib_ptib2->tib2_ultid));
93 }
94
SDL_SYS_WaitThread(SDL_Thread * thread)95 void 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 */
SDL_SYS_KillThread(SDL_Thread * thread)105 void SDL_SYS_KillThread(SDL_Thread *thread)
106 {
107 DosKillThread(thread->handle);
108 }
109