producer.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;
pput_key=102;
pput_num=1;
shm_flg=IPC_CREAT|0644;

buff_ptr=(char*)set_shm(buff_key,buff_num,shm_flg);
pput_ptr=(int*)set_shm(pput_key,pput_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;

pmtx_sem=set_sem(pmtx_key,sem_val,sem_flg);
while(1){
down(prod_sem);
down(pmtx_sem);

buff_ptr[*pput_ptr]='A'+*pput_ptr;
sleep(rate);
printf("%d producer put:%c to Buffer[%d]\n",getpid(),buff_ptr[*pput_ptr],*pput_ptr);

*pput_ptr=(*pput_ptr+1)%buff_num;
up(pmtx_sem);
up(cons_sem);



}
return EXIT_SUCCESS;
}