consumer.c

这是在linux环境下C++做的生产者和消费者问题

#include "ipc.h"
int main(int argc,char *argv[]){
int rate;
if(argv[1]!=NULL) rate=atoi(argv[1]);
else rate=3;
buff_key=101;
buff_num=8;
cget_key=103;
cget_num=1;
shm_flg=IPC_CREAT|0644;

buff_ptr=(char *)set_shm(buff_key,buff_num,shm_flg);
cget_ptr=(int *)set_shm(cget_key,cget_num,shm_flg);

prod_key=201;
pmtx_key=202;
cons_key=301;
cmtx_key=302;
sem_flg=IPC_CREAT|0644;
sem_val=buff_num;
prod_sem=set_sem(prod_key,sem_val,sem_flg);

sem_val=0;
cons_sem=set_sem(cons_key,sem_val,sem_flg);
sem_val=1;

cmtx_sem=set_sem(cmtx_key,sem_val,sem_flg);
while(1){
down(cons_sem);
down(cmtx_sem);


sleep(rate);
printf("%d consumer get:%c from Buffer[%d]\n",getpid(),buff_ptr[*cget_ptr],*cget_ptr);

*cget_ptr=(*cget_ptr+1)%buff_num;
up(cmtx_sem);
up(prod_sem);



}
return EXIT_SUCCESS;
}