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comparison src/thread/amigaos/SDL_syssem.c @ 1361:19418e4422cb

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New configure-based build system. Still work in progress, but much improved
author Sam Lantinga <slouken@libsdl.org>
date Thu, 16 Feb 2006 10:11:48 +0000
parents c71e05b4dc2e
children d910939febfa
comparison
equal deleted inserted replaced
1360:70a9cfb4cf1b 1361:19418e4422cb
27 27
28 28
29 struct SDL_semaphore 29 struct SDL_semaphore
30 { 30 {
31 struct SignalSemaphore Sem; 31 struct SignalSemaphore Sem;
32 Uint32 count;
33 Uint32 waiters_count;
34 SDL_mutex *count_lock;
35 SDL_cond *count_nonzero;
36 }; 32 };
37 33
38 #undef D 34 #undef D
39 35
40 #define D(x) 36 #define D(x)
96 92
97 D(bug("WaitTimeout (%ld) semaphore...%lx\n",timeout,sem)); 93 D(bug("WaitTimeout (%ld) semaphore...%lx\n",timeout,sem));
98 94
99 /* A timeout of 0 is an easy case */ 95 /* A timeout of 0 is an easy case */
100 if ( timeout == 0 ) { 96 if ( timeout == 0 ) {
101 return SDL_SemTryWait(sem); 97 ObtainSemaphore(&sem->Sem);
98 return 1;
102 } 99 }
103 /*
104 SDL_LockMutex(sem->count_lock);
105 ++sem->waiters_count;
106 retval = 0;
107 while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) {
108 retval = SDL_CondWaitTimeout(sem->count_nonzero,
109 sem->count_lock, timeout);
110 }
111 --sem->waiters_count;
112 --sem->count;
113 SDL_UnlockMutex(sem->count_lock);
114 */
115 if(!(retval=AttemptSemaphore(&sem->Sem))) 100 if(!(retval=AttemptSemaphore(&sem->Sem)))
116 { 101 {
117 SDL_Delay(timeout); 102 SDL_Delay(timeout);
118 retval=AttemptSemaphore(&sem->Sem); 103 retval=AttemptSemaphore(&sem->Sem);
119 } 104 }
129 114
130 int SDL_SemWait(SDL_sem *sem) 115 int SDL_SemWait(SDL_sem *sem)
131 { 116 {
132 ObtainSemaphore(&sem->Sem); 117 ObtainSemaphore(&sem->Sem);
133 return 0; 118 return 0;
134 // return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
135 } 119 }
136 120
137 Uint32 SDL_SemValue(SDL_sem *sem) 121 Uint32 SDL_SemValue(SDL_sem *sem)
138 { 122 {
139 Uint32 value; 123 Uint32 value;
143 #ifdef STORMC4_WOS 127 #ifdef STORMC4_WOS
144 value = sem->Sem.ssppc_SS.ss_NestCount; 128 value = sem->Sem.ssppc_SS.ss_NestCount;
145 #else 129 #else
146 value = sem->Sem.ss_NestCount; 130 value = sem->Sem.ss_NestCount;
147 #endif 131 #endif
148 // SDL_UnlockMutex(sem->count_lock);
149 } 132 }
150 return value; 133 return value;
151 } 134 }
152 135
153 int SDL_SemPost(SDL_sem *sem) 136 int SDL_SemPost(SDL_sem *sem)
157 return -1; 140 return -1;
158 } 141 }
159 D(bug("SemPost semaphore...%lx\n",sem)); 142 D(bug("SemPost semaphore...%lx\n",sem));
160 143
161 ReleaseSemaphore(&sem->Sem); 144 ReleaseSemaphore(&sem->Sem);
162 #if 0
163 SDL_LockMutex(sem->count_lock);
164 if ( sem->waiters_count > 0 ) {
165 SDL_CondSignal(sem->count_nonzero);
166 }
167 ++sem->count;
168 SDL_UnlockMutex(sem->count_lock);
169 #endif
170 return 0; 145 return 0;
171 } 146 }
172 147