semaphores.c File Reference

Wrappers around the sem* functions. More...

#include "config.h"
#include "defines.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <unistd.h>
#include <errno.h>
#include "semaphores.h"

Go to the source code of this file.

Functions
int	cf_sem_pv (int id, int operation, int semnum)
	This function performs semaphore operations.
int	cf_sem_getval (int id, int semnum, int num, unsigned short *val)

---

Detailed Description

Wrappers around the sem* functions.

Author:

Christian Kruse, <cjk@wwwtech.de>

This module provides some wrapper functions for the semaphore functions provided by POSIX. These functions make the handling of semaphores much easier

Definition in file semaphores.c.

---

Function Documentation

int cf_sem_getval (  int  id, int  semnum, int  num, unsigned short *  val )

This function returns the value of the selected semaphore Parameters: id  The semaphore ide semnum  The semaphore index in the set num  The number of semaphores in the set val  Reference to a integer variable where to store the value Returns: 0 on success, -1 on failure Definition at line 55 of file semaphores.c.

int cf_sem_pv (  int  id, int  operation, int  semnum )

This function performs semaphore operations. Parameters: id  The semaphore id operation  The size to increase or decrease the value of the semaphore. semnum  The index of the semaphore in the set. Returns: 0 on success, -1 on failure Definition at line 46 of file semaphores.c.

---