44 	SDL_cond *cond;  in SDL_CreateCond()  local
46 	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));  in SDL_CreateCond()
47 	if ( cond ) {  in SDL_CreateCond()
48 		cond->lock = SDL_CreateMutex();  in SDL_CreateCond()
49 		cond->wait_sem = SDL_CreateSemaphore(0);  in SDL_CreateCond()
50 		cond->wait_done = SDL_CreateSemaphore(0);  in SDL_CreateCond()
51 		cond->waiting = cond->signals = 0;  in SDL_CreateCond()
52 		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {  in SDL_CreateCond()
53 			SDL_DestroyCond(cond);  in SDL_CreateCond()
54 			cond = NULL;  in SDL_CreateCond()
59 	return(cond);  in SDL_CreateCond()
63 void SDL_DestroyCond(SDL_cond *cond)  in SDL_DestroyCond()  argument
65 	if ( cond ) {  in SDL_DestroyCond()
66 		if ( cond->wait_sem ) {  in SDL_DestroyCond()
67 			SDL_DestroySemaphore(cond->wait_sem);  in SDL_DestroyCond()
69 		if ( cond->wait_done ) {  in SDL_DestroyCond()
70 			SDL_DestroySemaphore(cond->wait_done);  in SDL_DestroyCond()
72 		if ( cond->lock ) {  in SDL_DestroyCond()
73 			SDL_DestroyMutex(cond->lock);  in SDL_DestroyCond()
75 		SDL_free(cond);  in SDL_DestroyCond()
80 int SDL_CondSignal(SDL_cond *cond)  in SDL_CondSignal()  argument
82 	if ( ! cond ) {  in SDL_CondSignal()
90 	SDL_LockMutex(cond->lock);  in SDL_CondSignal()
91 	if ( cond->waiting > cond->signals ) {  in SDL_CondSignal()
92 		++cond->signals;  in SDL_CondSignal()
93 		SDL_SemPost(cond->wait_sem);  in SDL_CondSignal()
94 		SDL_UnlockMutex(cond->lock);  in SDL_CondSignal()
95 		SDL_SemWait(cond->wait_done);  in SDL_CondSignal()
97 		SDL_UnlockMutex(cond->lock);  in SDL_CondSignal()
104 int SDL_CondBroadcast(SDL_cond *cond)  in SDL_CondBroadcast()  argument
106 	if ( ! cond ) {  in SDL_CondBroadcast()
114 	SDL_LockMutex(cond->lock);  in SDL_CondBroadcast()
115 	if ( cond->waiting > cond->signals ) {  in SDL_CondBroadcast()
118 		num_waiting = (cond->waiting - cond->signals);  in SDL_CondBroadcast()
119 		cond->signals = cond->waiting;  in SDL_CondBroadcast()
121 			SDL_SemPost(cond->wait_sem);  in SDL_CondBroadcast()
126 		SDL_UnlockMutex(cond->lock);  in SDL_CondBroadcast()
128 			SDL_SemWait(cond->wait_done);  in SDL_CondBroadcast()
131 		SDL_UnlockMutex(cond->lock);  in SDL_CondBroadcast()
157 int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)  in SDL_CondWaitTimeout()  argument
161 	if ( ! cond ) {  in SDL_CondWaitTimeout()
170 	SDL_LockMutex(cond->lock);  in SDL_CondWaitTimeout()
171 	++cond->waiting;  in SDL_CondWaitTimeout()
172 	SDL_UnlockMutex(cond->lock);  in SDL_CondWaitTimeout()
179 		retval = SDL_SemWait(cond->wait_sem);  in SDL_CondWaitTimeout()
181 		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);  in SDL_CondWaitTimeout()
190 	SDL_LockMutex(cond->lock);  in SDL_CondWaitTimeout()
191 	if ( cond->signals > 0 ) {  in SDL_CondWaitTimeout()
194 			SDL_SemWait(cond->wait_sem);  in SDL_CondWaitTimeout()
197 		SDL_SemPost(cond->wait_done);  in SDL_CondWaitTimeout()
200 		--cond->signals;  in SDL_CondWaitTimeout()
202 	--cond->waiting;  in SDL_CondWaitTimeout()
203 	SDL_UnlockMutex(cond->lock);  in SDL_CondWaitTimeout()
212 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)  in SDL_CondWait()  argument
214 	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);  in SDL_CondWait()