C Language Call library function to realize producer consumer problem

1#include <stdio.h>2#include <stdlib.h>3#include <semaphore.h>4#include <pthread.h>5#include <unistd.h>6 7 #defineNumof_producer 5//The Max Num of producer8 #defineNumof_consumer 10//The Max num of consumer9 #defineMaxnum 10//The Max num of productTenSem_t Empty_sem;//The goal of whether the num of product is null OneSem_t Full_sem;//The goal of whether the num of product is equal to Maxnum A  -pthread_mutex_t Mutex;//The goal of whether someone use the buff -  the intproducer_id =0; - intconsumer_id =0; - intNownumofproduce =0; - void*producer (void*ARG)//The thread of producer + { -     intid = producer_id++; +      while(1) A     { atSleep0.1); -Sem_wait (&full_sem);//When it comes to zero, it means that the NUM's product is equal to Maxnum -Pthread_mutex_lock (&mutex);//Lock the Buff -nownumofproduce++; -printf"producerthread%d product one,the num is:%d \ n", id%numof_producer,nownumofproduce); -Pthread_mutex_unlock (&Mutex); inSem_post (&empty_sem);//When it comes to ten, it means there is ten products can is used by consumer -     } to  +     return((void*)0); - } the  * void*consumer (void*Arg) $ {Panax Notoginseng     intid = consumer_id++; -      while(1) the     { +Sleep0.2); ASem_wait (&Empty_sem); thePthread_mutex_lock (&Mutex); +nownumofproduce--; -printf"Consumerthread%d use product one,the num is:%d \ n", id%numof_consumer,nownumofproduce); $Pthread_mutex_unlock (&Mutex); $Sem_post (&Full_sem); -     } -     return((void*)0); the } - Wuyi intMain () the { - pthread_t Con[numof_consumer]; Wu pthread_t Pro[numof_producer]; -  About     intTemp1 = Sem_init (&empty_sem,0,0); $     intTemp2 = Sem_init (&full_sem,0, maxnum); -     if(temp1&&temp2!=0) -     { -printf"sem init failed \ n"); AExit1); +     } the  -     intTemp3 = Pthread_mutex_init (&mutex,null); $  the     if(temp3!=0) the     { theprintf"Mutex init failed \ n"); theExit1); -     } in  the      for(intI=0; i<numof_producer;i++) the     { About         intTemp4 = Pthread_create (&pro[i],null,producer, (void*) &i); the         if(temp4!=0) the         { theprintf"thread Create failed!\n"); +Exit1); -         } the     }Bayi  the      for(intI=0; i<numof_consumer;i++) the     { -         intTEMP5 = Pthread_create (&con[i],null,consumer, (void*) &i); -         if(temp5!=0) the         { theprintf"thread Create failed!\n"); the         } theExit1); -     } the     //Destroy the thread the      for(intI=0; i<numof_consumer;i++) the     {94 Pthread_join (con[i],null); the     } the  the      for(intI=0; i<numof_producer;i++)98     { About Pthread_join (pro[i],null); -     }101 102     return 0;103}

Description: Unisted.h is used to call Sleep,pthread.h is the Linux system thread programming library, Semaphore.h is a function library using signal lights, as for those initialization method, wait method, post, etc. can be checked. If there are problems like sem_t not defined when compiling the program, you need to set up link links, find the Linux system installed in the Lib library libpthread.so import into it.

C Language Call library function to realize producer consumer problem