sem.h

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#ifndef SEM_H_
#define SEM_H_
 
#include <sys/types.h>
 
#define SEM_KEY 2222
#define SEM_OPT_NO_FLAG 0
#define SEM_TIMEOUT_READ 3
#define SEM_TIMEOUT_WRITE 1
 
#define SEM_SEM_COUNT 2
#define SEM_INDEX_DATA 0
#define SEM_INDEX_WAIT 1
 
int sem_create(key_t key, int count);
 
int sem_remove(int id);
 
int sem_open(key_t key, int count);
 
int sem_wait(int id, int index, int timeout);
 
int sem_set(int id, int index, int value);
 
int sem_get(int id, int index);
 
#endif /* SEM_H_ */