1 /* 2 * Copyright 2008-2015 Haiku, Inc. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _SEMAPHORE_H_ 6 #define _SEMAPHORE_H_ 7 8 9 #include <fcntl.h> 10 #include <stdint.h> 11 #include <sys/cdefs.h> 12 #include <time.h> 13 14 15 typedef struct _sem_t { 16 int32_t type; 17 union { 18 int32_t named_sem_id; 19 int32_t unnamed_sem; 20 } u; 21 int32_t padding[2]; 22 } sem_t; 23 24 #define SEM_FAILED ((sem_t*)(long)-1) 25 26 __BEGIN_DECLS 27 28 sem_t* sem_open(const char* name, int openFlags,...); 29 int sem_close(sem_t* semaphore); 30 int sem_unlink(const char* name); 31 32 int sem_init(sem_t* semaphore, int shared, unsigned value); 33 int sem_destroy(sem_t* semaphore); 34 35 int sem_post(sem_t* semaphore); 36 int sem_clockwait(sem_t* semaphore, clockid_t clock_id, 37 const struct timespec* abstime); 38 int sem_timedwait(sem_t* semaphore, const struct timespec* abstime); 39 int sem_trywait(sem_t* semaphore); 40 int sem_wait(sem_t* semaphore); 41 int sem_getvalue(sem_t* semaphore, int* value); 42 43 __END_DECLS 44 45 46 #endif /* _SEMAPHORE_H_ */ 47