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 #include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
#define M 10 // »º³åÊýÄ¿
int in = 0;   // Éú²úÕß·ÅÖòúÆ·µÄλÖÃ
int out = 0; // Ïû·ÑÕßÈ¡²úÆ·µÄλÖÃ
int buff[M] = {0}; // »º³å³õʼ»¯Îª0£¬ ¿ªÊ¼Ê±Ã»ÓвúÆ·
sem_t empty_sem; // ͬ²½ÐźÅÁ¿£¬ µ±ÂúÁËʱ×èÖ¹Éú²úÕ߷ŲúÆ·
sem_t full_sem;   // ͬ²½ÐźÅÁ¿£¬ µ±Ã»²úƷʱ×èÖ¹Ïû·ÑÕßÏû·Ñ
pthread_mutex_t mutex; // »¥³âÐźÅÁ¿£¬ Ò»´ÎÖ»ÓÐÒ»¸öÏ̷߳ÃÎÊ»º³å
int product_id = 0;   //Éú²úÕßid
int prochase_id = 0; //Ïû·ÑÕßid
/* ´òÓ¡»º³åÇé¿ö */
void print()
{
int i;
for(i = 0; i < M; i++)
   printf("%d ", buff[i]);
printf("\n");
}
/* Éú²úÕß·½·¨ */
void *product()
{
int id = ++product_id;
while(1)
{
   // ÓÃsleepµÄÊýÁ¿¿ÉÒÔµ÷½ÚÉú²úºÍÏû·ÑµÄËÙ¶È£¬±ãÓÚ¹Û²ì
   sleep(1);
   //sleep(1);
 
   sem_wait(&empty_sem);
   pthread_mutex_lock(&mutex);
 Õâ¶þ¾äÈç¹ûµßµ¹µÄ»°,¿ÉÄܳöÏÖÒ»ÖÖÒì³£Çé¿ö,
µ±½øÈëÁË»º³åÇøÎªÂúʱ,µßµ¹Ö®ºó»á¶Ô»º³åÇøÏȼÓËø,È»ºó,½ø³ÌÓÉÓÚ»º³åÇøÎªÂòû·¨Éú²ú²úÆ·,ÔÚÕâÀï±»×èÈû,¶øÏû·ÑÕßÓÖÎÞ·¨»ñµÃ»º³åÇøµÄËø½øÈ뻺³åÇø,Òò¶ø»á³öÏÖËÀËø
  
   in = in % M;
   printf("product%d in %d. like: \t", id, in);
 
   buff[in] = 1; 
   print(); 
   ++in;
 
   pthread_mutex_unlock(&mutex);
   sem_post(&full_sem); 
}
}
/* Ïû·ÑÕß·½·¨ */
void *prochase()
{
int id = ++prochase_id;
while(1)
{
   // ÓÃsleepµÄÊýÁ¿¿ÉÒÔµ÷½ÚÉú²úºÍÏû·ÑµÄËÙ¶È£¬±ãÓÚ¹Û²ì
   sleep(2);
  
   sem_wait(&full_sem);       //  Õâ¶þ¾äÈç¹ûµßµ¹µÄ»°,¿ÉÄܳöÏÖÒ»ÖÖÒì³£Çé¿ö,
µ±½øÈëÁË»º³åÇøÎª¿Õʱ,µßµ¹Ö®ºó»á¶Ô»º³åÇøÏȼÓËø,È»ºó,½ø³ÌÓÉÓÚ»º³åÇøÎª¿Õû·¢Ïû·Ñ²úÆ·,ÔÚÕâÀï±»×èÈû,¶øÉú²úÕßÓÖÎÞ·¨»ñµÃ»º³åÇøµÄËø½øÈ뻺³åÇø,Òò¶ø»á³öÏÖËÀËø
   pthread_mutex_lock(&mutex);


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