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1、生产者和消费者生产者和消费者#include#include#include#include#include/定义一些常量；/本程序允许的最大临界区数；#define MAX_BUFFER_NUM 10/秒到微秒的乘法因子；#define INTE_PER_SEC 1000/本程序允许的生产和消费线程的总数；#define MAX_THREAD_NUM 64/定义一个结构，记录在测试文件中指定的每一个线程的参数struct ThreadInfoint serial; /线程序列号char entity; /是 P 还是 Cdouble delay; /线程延迟int thread_reques
2、tMAX_THREAD_NUM; /线程请求队列int n_request; /请求个数;/全局变量的定义/临界区对象的声明,用于管理缓冲区的互斥访问；CRITICAL_SECTION PC_CriticalMAX_BUFFER_NUM; int Buffer_CriticalMAX_BUFFER_NUM; /缓冲区声明，用于存放产品；HANDLE h_ThreadMAX_THREAD_NUM; /用于存储每个线程句柄的数组；ThreadInfo Thread_InfoMAX_THREAD_NUM; /线程信息数组；HANDLE empty_semaphore; /一个信号量；HANDLE h
3、_mutex; /一个互斥量；DWORD n_Thread = 0; /实际的线程的数目；DWORD n_Buffer_or_Critical; /实际的缓冲区或者临界区的数目；HANDLE h_SemaphoreMAX_THREAD_NUM; /生产者允许消费者开始消费的信号量；/生产消费及辅助函数的声明void Produce(void *p);void Consume(void *p); bool IfInOtherRequest(int);int FindProducePositon();int FindBufferPosition(int);int main(void)/声明所需变量
4、；DWORD wait_for_all;ifstream inFile;/初始化缓冲区；for(int i=0;i n_Buffer_or_Critical;inFile.get();printf(“输入文件是:n“);/回显获得的缓冲区的数目信息；printf(“%d n“,(int) n_Buffer_or_Critical);/提取每个线程的信息到相应数据结构中；while(inFile)inFile Thread_Infon_Thread.serial;inFile Thread_Infon_Thread.entity;inFile Thread_Infon_Thread.delay;
5、char c;inFile.get(c);while(c!=ninFile.get(c); n_Thread+; /回显获得的线程信息，便于确认正确性； for(j=0;jserial;m_delay = (DWORD)(ThreadInfo*)(p)-delay *INTE_PER_SEC);Sleep(m_delay);/开始请求生产printf(“Producer %2d sends the produce require.n“,m_serial);/确认有空缓冲区可供生产，同时将空位置数 empty 减 1；用于生产者和消费者的同步；wait_for_semaphore = WaitF
6、orSingleObject(empty_semaphore,-1);/互斥访问下一个可用于生产的空临界区，实现写写互斥；wait_for_mutex = WaitForSingleObject(h_mutex,-1);int ProducePos = FindProducePosition();ReleaseMutex(h_mutex);/生产者在获得自己的空位置并做上标记后，以下的写操作在生产者之间可以并发；/核心生产步骤中，程序将生产者的 ID 作为产品编号放入，方便消费者识别;printf(“Producer %2d begin to produce at position %2d.n
7、“,m_serial,ProducePos);Buffer_CriticalProducePos = m_serial;printf(“Producer %2d finish producing :n “,m_serial);printf(“ position %2d :%3d n“ ,ProducePos,Buffer_CriticalProducePos);/使生产者写的缓冲区可以被多个消费者使用，实现读写同步；ReleaseSemaphore(h_Semaphorem_serial,n_Thread,NULL);/消费者进程void Consume(void * p)/局部变量声明；DW
8、ORD wait_for_semaphore,m_delay;int m_serial,m_requestNum; /消费者的序列号和请求的数目；int m_thread_requestMAX_THREAD_NUM;/本消费线程的请求队列；/提取本线程的信息到本地；m_serial = (ThreadInfo*)(p)-serial;m_delay = (DWORD)(ThreadInfo*)(p)-delay *INTE_PER_SEC);m_requestNum = (ThreadInfo *)(p)-n_request;for (int i = 0;ithread_requesti;Sl
9、eep(m_delay); /循环进行所需产品的消费for(i =0;ithread_requesti =-1;if(!IfInOtherRequest(m_thread_requesti)Buffer_CriticalBufferPos = -1;/标记缓冲区为空；printf(“Consumer%2d finish consuming %2d:n “,m_serial,m_thread_requesti);printf(“ position %2d :%3d n“ ,BufferPos,Buffer_CriticalBufferPos);ReleaseSemaphore(empty_semaphore,1,NULL); elseprintf(“Consumer %2d finish consuming product %2dn “,m_serial,m_thread_requesti);/离开临界区LeaveCriticalSection(
