me_ipc.h

这是在linux环境下C++做的生产者和消费者问题

/*******************************ipc.h**********************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/msg.h>

#define BUFSZ 256

/*
* the functions to get the shared memary and the semaphore
*/
int get_ipc_id(char *proc_file,key_t key);
char *set_shm(key_t shm_key,int shm_num,int shm_flag);
int set_sem(key_t sem_key,int sem_val,int sem_flag);
int operationP(int sem_id);
int operationV(int sem_id);
/*
* semaphore control union
*/
typedef union semuns{
    int val;
}Sem_uns;
typedef struct msgbuf{
    long mtype;
    char *mtext;
} Msg_buf;
/**
* the variables needed by the producers and the consumers
*/
key_t buff_key;/*material's key*/
int i;
int buff_num;
int *buff_ptr;
int buff_flag;
key_t full_key;
key_t empty_key;
key_t pro_ex_key;
key_t cons_ex_key;
int full_value;
int empty_value;
int pro_ex_value;
int cons_ex_value;
int full_sem;
int empty_sem;
int pro_ex_sem;
int cons_ex_sem;
int sem_flag;
/*********************ipc.h end******************/