40 xsem_init(xsem_t *sem, int pshared, unsigned int value)  in xsem_init()  argument
45 	pthread_mutex_init(&sem->semMutex, NULL);  in xsem_init()
46 	pthread_cond_init(&sem->semCV, NULL);  in xsem_init()
47 	sem->semaphore = value;  in xsem_init()
53 xsem_destroy(xsem_t *sem)  in xsem_destroy()  argument
55 	pthread_mutex_destroy(&sem->semMutex);  in xsem_destroy()
56 	pthread_cond_destroy(&sem->semCV);  in xsem_destroy()
57 	sem->semaphore = 0;  in xsem_destroy()
61 xsem_wait(xsem_t *sem)  in xsem_wait()  argument
63 	pthread_mutex_lock(&sem->semMutex);  in xsem_wait()
65 	if (sem->semaphore < 0) {  in xsem_wait()
66 		sem->semaphore = 0;  in xsem_wait()
67 		pthread_mutex_unlock(&sem->semMutex);  in xsem_wait()
71 	if (sem->semaphore > 0) {  in xsem_wait()
72 		sem->semaphore--;  in xsem_wait()
74 		while (sem->semaphore == 0)  in xsem_wait()
75 			pthread_cond_wait(&sem->semCV, &sem->semMutex);  in xsem_wait()
77 		if (sem->semaphore != 0) {  in xsem_wait()
78 			sem->semaphore--;  in xsem_wait()
80 			pthread_mutex_unlock(&sem->semMutex);  in xsem_wait()
85 	pthread_mutex_unlock(&sem->semMutex);  in xsem_wait()
91 xsem_trywait(xsem_t *sem)  in xsem_trywait()  argument
93 	pthread_mutex_lock(&sem->semMutex);  in xsem_trywait()
95 	if (sem->semaphore < 0) {  in xsem_trywait()
96 		sem->semaphore = 0;  in xsem_trywait()
97 		pthread_mutex_unlock(&sem->semMutex);  in xsem_trywait()
101 	if (sem->semaphore == 0) {  in xsem_trywait()
102 		pthread_mutex_unlock(&sem->semMutex);  in xsem_trywait()
105 		sem->semaphore--;  in xsem_trywait()
108 	pthread_mutex_unlock(&sem->semMutex);  in xsem_trywait()
114 xsem_post(xsem_t *sem)  in xsem_post()  argument
116 	pthread_mutex_lock(&sem->semMutex);  in xsem_post()
117 	sem->semaphore++;  in xsem_post()
118 	pthread_cond_signal(&sem->semCV);  in xsem_post()
119 	pthread_mutex_unlock(&sem->semMutex);  in xsem_post()
126 xsem_getvalue(xsem_t *sem, int *sval)  in xsem_getvalue()  argument
128 	*sval = sem->semaphore;  in xsem_getvalue()
134 xsem_xwait(xsem_t *sem, int timeout, timestruc_t *mytime)  in xsem_xwait()  argument
140 		return (xsem_wait(sem));  in xsem_xwait()
142 		pthread_mutex_lock(&sem->semMutex);  in xsem_xwait()
144 		if (sem->semaphore < 0) {  in xsem_xwait()
145 			sem->semaphore = 0;  in xsem_xwait()
146 			pthread_mutex_unlock(&sem->semMutex);  in xsem_xwait()
150 		if (sem->semaphore > 0) {  in xsem_xwait()
151 			sem->semaphore--;  in xsem_xwait()
157 			while ((sem->semaphore == 0) && (status == 0)) {  in xsem_xwait()
158 				status = pthread_cond_timedwait(&sem->semCV,  in xsem_xwait()
159 				    &sem->semMutex, &delay);  in xsem_xwait()
168 				pthread_mutex_unlock(&sem->semMutex);  in xsem_xwait()
170 			} else if (sem->semaphore != 0) {  in xsem_xwait()
171 				sem->semaphore--;  in xsem_xwait()
173 				pthread_mutex_unlock(&sem->semMutex);  in xsem_xwait()
178 		pthread_mutex_unlock(&sem->semMutex);  in xsem_xwait()