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semaphore.h
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C/C++ Source or Header
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1999-10-03
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705b
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31 lines
#ifndef __SEMAPHORE_H
#define __SEMAPHORE_H
#define SEM_VALUE_MAX 64
#if defined(c_plusplus) || defined(__cplusplus)
extern "C" {
#endif /* c_plusplus || __cplusplus */
typedef struct psem {
pthread_mutex_t sem_lock;
int sem_value;
int sem_waiting;
} sem_t;
int sem_init(sem_t* sem, int pshared, unsigned int value);
int sem_destroy(sem_t* sem);
sem_t sem_open(const char* name, int oflag, ...);
int sem_close(sem_t* sem);
int sem_unlink(const char* name);
int sem_wait(sem_t* sem);
int sem_trywait(sem_t* sem);
int sem_post(sem_t* sem);
int sem_getvalue(sem_t* sem, int* sval);
#if defined(c_plusplus) || defined(__cplusplus)
};
#endif /* c_plusplus || __cplusplus */
#endif /* __SEMAPHORE_H */