ipc.h

这是在linux环境下C++做的生产者和消费者问题

#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

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_msq(key_t msq_key,int msq_flag);

int set_sem(key_t sem_key,int sem_val,int sem_flag);

int down(int sem_id);
int up(int sem_id);
typedef union semuns{
int val;
}Sem_uns;

typedef struct msgbuf{
long mtype;
char mtext[1];
}Msg_buf;

key_t buff_key;
int buff_num;
int *buff_ptr;

key_t pput_key;
int pput_num;
int *pput_ptr;

key_t cget_key;
int cget_num;
int *cget_ptr;

key_t prod_key;
key_t pmtx_key;
int prod_sem;
int pmtx_sem;

key_t cons_key;
key_t cmtx_key;
int cons_sem;
int cmtx_sem;

int sem_val;
int sem_flg;
int shm_flg;