e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | |
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 | |
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 | |
83 | void SDL_SYS_SetupThread(void) |
84 | { |
85 | return; |
86 | } |
87 | |
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 | |
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 | */ |
105 | void SDL_SYS_KillThread(SDL_Thread *thread) |
106 | { |
107 | DosKillThread(thread->handle); |
108 | } |