headers/posix/semaphore.h

   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_timedwait(sem_t* semaphore, const struct timespec* timeout);
  37 int             sem_trywait(sem_t* semaphore);
  38 int             sem_wait(sem_t* semaphore);
  39 int             sem_getvalue(sem_t* semaphore, int* value);
  40
  41 __END_DECLS
  42
  43
  44 #endif  /* _SEMAPHORE_H_ */