生产者消费者问题c语言实现

 #include <stdio.h>
 #include <process.h>
 #include <Windows.h>
 //信号量与关键段
 CRITICAL_SECTION g_cs;
 HANDLE Empty,Full;

 const int BUFFER_SIZE=;//10个缓冲池
 const int numofp=;//生产者线程数
 const int numofc=;//消费者线程数
 const int numofpr=;//要生产的产品数
 int buffer[BUFFER_SIZE];
 int pf=,pe=;
 int count=;
 int count_c=;
 int mp=;

 //生产者
 unsigned int __stdcall Producer(PVOID p){

     while(true){
         //等待有空的缓冲区出现
         WaitForSingleObject(Empty, INFINITE);
         //互斥的访问缓冲区
         EnterCriticalSection(&g_cs);
         if(count>numofpr){
             LeaveCriticalSection(&g_cs);
             ReleaseSemaphore(Full,,NULL);
             break;
         }
         buffer[pe]=++mp;
         //printf("%d,",*((int *)p));
         printf("编号为%d的生产者从第%d个空缓冲池中写入数据%d\n",*((int *)p),pe,buffer[pe]);
         pe=(pe+)%BUFFER_SIZE;
         count++;
         LeaveCriticalSection(&g_cs);
         //通知消费者有新数据了
         ReleaseSemaphore(Full,,NULL);
     }
     return ;
 }
 //消费者
 unsigned int __stdcall Consumer(PVOID p){

     while(true){
             WaitForSingleObject(Full,INFINITE);
             EnterCriticalSection(&g_cs);
             if(count_c>numofpr){
                 LeaveCriticalSection(&g_cs);
                 ReleaseSemaphore(Empty,,NULL);
                 break;
             }
             //printf("%d,",*((int *)p));
             printf("    编号为%d的消费者从第%d个FULL缓冲区中取出数据%d\n",*((int *)p),pf,buffer[pf]);
             pf=(pf+)%BUFFER_SIZE;
             count_c++;
             LeaveCriticalSection(&g_cs);
             ReleaseSemaphore(Empty,,NULL);
         }
             return ;
 }

 int main(){
     printf("  生产者消费者问题:%d生产者-%d消费者-%d缓冲区-%d个产品\n\n",numofp,numofc,BUFFER_SIZE,numofpr);
     InitializeCriticalSection(&g_cs);//初始化一个临界区对象
     //初始化信号量,一个记录有产品的缓冲区个数,另一个记录空缓冲区个数.
     Empty=CreateSemaphore(NULL,,,NULL);
     Full=CreateSemaphore(NULL,,,NULL);
     const int THREADNUM=numofc+numofp;//线程数
     HANDLE hThread[THREADNUM];
     //生产者线程
     int a=,b=,c=,d=;
     hThread[]=(HANDLE)_beginthreadex(
         NULL,//安全属性，NULL为默认安全属性
         ,//指定线程堆栈的大小,一般为0
         Producer,//指定线程函数的地址
         &a,//传递给线程的参数的指针
         ,//线程初始状态，0:立即运行
         NULL);//用于记录线程ID的地址

     hThread[]=(HANDLE)_beginthreadex(NULL,,Producer,&b,,NULL);

     hThread[]=(HANDLE)_beginthreadex(NULL,,Consumer,&c,,NULL);

     hThread[]=(HANDLE)_beginthreadex(NULL,,Consumer,&d,,NULL);
     WaitForMultipleObjects(THREADNUM, hThread, TRUE, INFINITE);
     for (int i = ; i < THREADNUM; i++)
         CloseHandle(hThread[i]);

     //销毁信号量和关键段
     CloseHandle(Empty);
     CloseHandle(Full);
     DeleteCriticalSection(&g_cs);
     system("pause");

     return ;
 }