sdl

FORK: Simple Directmedia Layer
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SDL_systhread.c (3673B)

      1 /*
      2   Simple DirectMedia Layer
      3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
      4 
      5   This software is provided 'as-is', without any express or implied
      6   warranty.  In no event will the authors be held liable for any damages
      7   arising from the use of this software.
      8 
      9   Permission is granted to anyone to use this software for any purpose,
     10   including commercial applications, and to alter it and redistribute it
     11   freely, subject to the following restrictions:
     12 
     13   1. The origin of this software must not be misrepresented; you must not
     14      claim that you wrote the original software. If you use this software
     15      in a product, an acknowledgment in the product documentation would be
     16      appreciated but is not required.
     17   2. Altered source versions must be plainly marked as such, and must not be
     18      misrepresented as being the original software.
     19   3. This notice may not be removed or altered from any source distribution.
     20 */
     21 #include "../../SDL_internal.h"
     22 
     23 #if SDL_THREAD_OS2
     24 
     25 /* Thread management routines for SDL */
     26 
     27 #include "SDL_thread.h"
     28 #include "../SDL_systhread.h"
     29 #include "../SDL_thread_c.h"
     30 #include "../SDL_systhread.h"
     31 #include "SDL_systls_c.h"
     32 #include "../../core/os2/SDL_os2.h"
     33 #ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
     34 #error This source only adjusted for SDL_PASSED_BEGINTHREAD_ENDTHREAD
     35 #endif
     36 
     37 #define INCL_DOSPROCESS
     38 #define INCL_DOSERRORS
     39 #include <os2.h>
     40 #include <process.h>
     41 
     42 
     43 static void RunThread(void *data)
     44 {
     45     SDL_Thread *thread = (SDL_Thread *) data;
     46     pfnSDL_CurrentEndThread pfnEndThread = (pfnSDL_CurrentEndThread) thread->endfunc;
     47 
     48     if (ppSDLTLSData != NULL)
     49         *ppSDLTLSData = NULL;
     50 
     51     SDL_RunThread(thread);
     52 
     53     if (pfnEndThread != NULL)
     54         pfnEndThread();
     55 }
     56 
     57 int
     58 SDL_SYS_CreateThread(SDL_Thread * thread,
     59                      pfnSDL_CurrentBeginThread pfnBeginThread,
     60                      pfnSDL_CurrentEndThread pfnEndThread)
     61 {
     62     if (thread->stacksize == 0)
     63         thread->stacksize = 65536;
     64 
     65     if (pfnBeginThread) {
     66         /* Save the function which we will have to call to clear the RTL of calling app! */
     67         thread->endfunc = pfnEndThread;
     68         /* Start the thread using the runtime library of calling app! */
     69         thread->handle = (SYS_ThreadHandle)
     70                             pfnBeginThread(RunThread, NULL, thread->stacksize, thread);
     71     } else {
     72         thread->endfunc = _endthread;
     73         thread->handle = (SYS_ThreadHandle)
     74                             _beginthread(RunThread, NULL, thread->stacksize, thread);
     75     }
     76 
     77     if (thread->handle == -1)
     78         return SDL_SetError("Not enough resources to create thread");
     79 
     80     return 0;
     81 }
     82 
     83 void
     84 SDL_SYS_SetupThread(const char *name)
     85 {
     86     /* nothing. */
     87 }
     88 
     89 SDL_threadID
     90 SDL_ThreadID(void)
     91 {
     92     PTIB  tib;
     93     PPIB  pib;
     94 
     95     DosGetInfoBlocks(&tib, &pib);
     96     return tib->tib_ptib2->tib2_ultid;
     97 }
     98 
     99 int
    100 SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
    101 {
    102     ULONG ulRC;
    103 
    104     ulRC = DosSetPriority(PRTYS_THREAD,
    105                           (priority < SDL_THREAD_PRIORITY_NORMAL)? PRTYC_IDLETIME :
    106                            (priority > SDL_THREAD_PRIORITY_NORMAL)? PRTYC_TIMECRITICAL :
    107                             PRTYC_REGULAR,
    108                           0, 0);
    109     if (ulRC != NO_ERROR)
    110         return SDL_SetError("DosSetPriority() failed, rc = %u", ulRC);
    111 
    112     return 0;
    113 }
    114 
    115 void
    116 SDL_SYS_WaitThread(SDL_Thread * thread)
    117 {
    118     ULONG ulRC = DosWaitThread((PTID)&thread->handle, DCWW_WAIT);
    119 
    120     if (ulRC != NO_ERROR) {
    121         debug_os2("DosWaitThread() failed, rc = %u", ulRC);
    122     }
    123 }
    124 
    125 void
    126 SDL_SYS_DetachThread(SDL_Thread * thread)
    127 {
    128     /* nothing. */
    129 }
    130 
    131 #endif /* SDL_THREAD_OS2 */
    132 
    133 /* vi: set ts=4 sw=4 expandtab: */