174 lines
4.3 KiB
C
174 lines
4.3 KiB
C
#include <SDL.h>
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#include <SDL_thread.h>
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#include "quakedef.h"
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#include "thread.h"
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int Thread_Init(void)
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{
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#ifdef THREADDISABLE
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Con_Printf("Threading disabled in this build\n");
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#endif
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return 0;
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}
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void Thread_Shutdown(void)
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{
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}
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qboolean Thread_HasThreads(void)
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{
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#ifdef THREADDISABLE
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return false;
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#else
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return true;
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#endif
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}
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void *_Thread_CreateMutex(const char *filename, int fileline)
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{
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void *mutex = SDL_CreateMutex();
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p mutex create %s:%i\n" , mutex, filename, fileline);
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#endif
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return mutex;
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}
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void _Thread_DestroyMutex(void *mutex, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p mutex destroy %s:%i\n", mutex, filename, fileline);
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#endif
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SDL_DestroyMutex((SDL_mutex *)mutex);
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}
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int _Thread_LockMutex(void *mutex, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p mutex lock %s:%i\n" , mutex, filename, fileline);
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#endif
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return SDL_LockMutex((SDL_mutex *)mutex);
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}
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int _Thread_UnlockMutex(void *mutex, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p mutex unlock %s:%i\n" , mutex, filename, fileline);
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#endif
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return SDL_UnlockMutex((SDL_mutex *)mutex);
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}
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void *_Thread_CreateCond(const char *filename, int fileline)
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{
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void *cond = (void *)SDL_CreateCond();
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p cond create %s:%i\n" , cond, filename, fileline);
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#endif
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return cond;
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}
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void _Thread_DestroyCond(void *cond, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p cond destroy %s:%i\n" , cond, filename, fileline);
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#endif
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SDL_DestroyCond((SDL_cond *)cond);
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}
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int _Thread_CondSignal(void *cond, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p cond signal %s:%i\n" , cond, filename, fileline);
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#endif
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return SDL_CondSignal((SDL_cond *)cond);
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}
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int _Thread_CondBroadcast(void *cond, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p cond broadcast %s:%i\n" , cond, filename, fileline);
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#endif
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return SDL_CondBroadcast((SDL_cond *)cond);
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}
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int _Thread_CondWait(void *cond, void *mutex, const char *filename, int fileline)
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{
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p cond wait %s:%i\n" , cond, filename, fileline);
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#endif
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return SDL_CondWait((SDL_cond *)cond, (SDL_mutex *)mutex);
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}
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void *_Thread_CreateThread(int (*fn)(void *), void *data, const char *filename, int fileline)
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{
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#if SDL_MAJOR_VERSION == 1
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void *thread = (void *)SDL_CreateThread(fn, data);
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#else
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void *thread = (void *)SDL_CreateThread(fn, filename, data);
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#endif
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p thread create %s:%i\n" , thread, filename, fileline);
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#endif
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return thread;
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}
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int _Thread_WaitThread(void *thread, int retval, const char *filename, int fileline)
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{
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int status = retval;
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p thread wait %s:%i\n" , thread, filename, fileline);
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#endif
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SDL_WaitThread((SDL_Thread *)thread, &status);
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return status;
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}
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// standard barrier implementation using conds and mutexes
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// see: http://www.howforge.com/implementing-barrier-in-pthreads
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typedef struct {
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unsigned int needed;
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unsigned int called;
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void *mutex;
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void *cond;
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} barrier_t;
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void *_Thread_CreateBarrier(unsigned int count, const char *filename, int fileline)
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{
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volatile barrier_t *b = (volatile barrier_t *) Z_Malloc(sizeof(barrier_t));
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p barrier create(%d) %s:%i\n", b, count, filename, fileline);
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#endif
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b->needed = count;
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b->called = 0;
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b->mutex = Thread_CreateMutex();
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b->cond = Thread_CreateCond();
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return (void *) b;
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}
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void _Thread_DestroyBarrier(void *barrier, const char *filename, int fileline)
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{
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volatile barrier_t *b = (volatile barrier_t *) barrier;
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p barrier destroy %s:%i\n", b, filename, fileline);
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#endif
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Thread_DestroyMutex(b->mutex);
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Thread_DestroyCond(b->cond);
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}
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void _Thread_WaitBarrier(void *barrier, const char *filename, int fileline)
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{
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volatile barrier_t *b = (volatile barrier_t *) barrier;
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#ifdef THREADDEBUG
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Sys_PrintfToTerminal("%p barrier wait %s:%i\n", b, filename, fileline);
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#endif
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Thread_LockMutex(b->mutex);
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b->called++;
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if (b->called == b->needed) {
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b->called = 0;
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Thread_CondBroadcast(b->cond);
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} else {
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do {
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Thread_CondWait(b->cond, b->mutex);
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} while(b->called);
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}
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Thread_UnlockMutex(b->mutex);
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}
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