操作系统生产者消费者问题C语言

1、操作系统生产者消费者问题C语言操作系统概念第七版 中的实验项目：生产者消费者问题。本程序中，main()函数需要三个参数：主线程休眠时间；生产者线程数；消费者线程数。各线程的休眠等待时间是随机的。程序代码：#include<>#include<>#include<>#include<>#define BUFFER_SIZE 5typedef int buffer_item;struct vint i;buffer_item bufferBUFFER_SIZE+1;buffer_item front=0,rear=0;HANDLE mutex,em

2、pty,full;int insert_item(buffer_item item)/*insert item into bufferreturn 0 if successful,otherwise return -1 indicating an error condition*/if(rear+1)%(BUFFER_SIZE+1)=front)return 1;bufferrear=item;rear=(rear+1)%(BUFFER_SIZE+1);return 0;int remove_item(buffer_item *item)/*remove an object from buff

3、er placing it in item return 0 if successful,otherwise reutrn -1 indication an error condition */if(front = rear)return 1;*item=bufferfront;front=(front+1) % (BUFFER_SIZE+1);return 0;DWORD WINAPI producer(PVOID Param)int rand1;struct v data=*(struct v *)Param;srand(unsigned)time(0);while (1) Sleep(r

4、and()%101*10);WaitForSingleObject(empty,INFINITE);WaitForSingleObject(mutex,INFINITE);rand1 =rand();printf("producer has producerd %d By %dn",rand1,;if(insert_item(rand1)printf("insert data error!n");ReleaseMutex(mutex);ReleaseSemaphore(full,1,NULL);DWORD WINAPI consumer(PVOID Pa

5、ram)int rand1;struct v data=*(struct v *)Param;srand(unsigned)time(0);while (1)Sleep(rand()%101*10);WaitForSingleObject(full,INFINITE);WaitForSingleObject(mutex,INFINITE);if(remove_item(&rand1)printf("remove data error! n");elseprintf("consumer consumed %d By %d n",rand1,;Rel

6、easeMutex(mutex);ReleaseSemaphore(empty,1,NULL);int main(int argc,char *argv)/*Get command line arguments argv1)(the number of producer threads),argv2(the number of consumer threads),argv3(sleep time)*/*Initialize buffer*/int sleeptime,pnum,snum;int *ThreadIdP,*ThreadIdS,i;struct v *countp,*counts;H

7、ANDLE *ThreadHandleP,*ThreadHandleS;sleeptime=atoi(argv1);pnum=atoi(argv2);snum=atoi(argv3);/*srand(time(NULL);sleeptime=9000;pnum=3;snum=3;*/ThreadHandleP=(HANDLE * )malloc(pnum * sizeof(HANDLE);ThreadHandleS=(HANDLE * )malloc(snum * sizeof(HANDLE);ThreadIdP=(int * )malloc(pnum * sizeof(int);Thread

8、IdS=(int * )malloc(pnum * sizeof(int);mutex=CreateMutex(NULL,FALSE,NULL);empty=CreateSemaphore(NULL,BUFFER_SIZE,BUFFER_SIZE,NULL);full=CreateSemaphore(NULL,0,BUFFER_SIZE+1,NULL);/*Create producer thread(s)*/countp=(struct v *)malloc(pnum+1)*sizeof(struct v);counts=(struct v *)malloc(snum+1)*sizeof(s

9、truct v);for(i=0;i<pnum;i+)countpi+1.i=i+1;ThreadHandlePi=CreateThread(NULL,0,producer,&countpi+1,0,&ThreadIdPi);/*Create consumer thread(s)*/for(i=0;i<snum;i+)countsi+1.i=i+1;ThreadHandleSi=CreateThread(NULL,0,consumer,&countsi+1,0,&ThreadIdSi);/*Sleep*/Sleep(sleeptime);/*Exit

10、*/return 0;#include ""#include<>#include<>#include<>#include<>#define BUFFER_SIZE 5typedef int buffer_item;struct vint i;buffer_item bufferBUFFER_SIZE+1;buffer_item front=0,rear=0;HANDLE mutex,empty,full;int insert_item(buffer_item item)/*insert item into bufferretu

11、rn 0 if successful,otherwise return -1 indicating an error condition*/if(rear+1)%(BUFFER_SIZE+1)=front)return 1;bufferrear=item;rear=(rear+1)%(BUFFER_SIZE+1);return 0;int remove_item(buffer_item *item)/*remove an object from buffer placing it in item return 0 if successful,otherwise reutrn -1 indica

12、tion an error condition */if(front = rear)return 1;*item=bufferfront;front=(front+1) % (BUFFER_SIZE+1);return 0;DWORD WINAPI producer(PVOID Param)int rand1;struct v data=*(struct v *)Param;srand(unsigned)time(0);while (1) Sleep(rand()%101*10);WaitForSingleObject(empty,INFINITE);WaitForSingleObject(m

13、utex,INFINITE);rand1 =rand();printf("producer has producerd %d By %dn",rand1,;if(insert_item(rand1)printf("insert data error!n");ReleaseMutex(mutex);ReleaseSemaphore(full,1,NULL);DWORD WINAPI consumer(PVOID Param)int rand1;struct v data=*(struct v *)Param;srand(unsigned)time(0);w

14、hile (1)Sleep(rand()%101*10);WaitForSingleObject(full,INFINITE);WaitForSingleObject(mutex,INFINITE);if(remove_item(&rand1)printf("remove data error! n");elseprintf("consumer consumed %d By %d n",rand1,;ReleaseMutex(mutex);ReleaseSemaphore(empty,1,NULL);int main(int argc,char

15、*argv)/*Get command line arguments argv1)(the number of producer threads),argv2(the number of consumer threads),argv3(sleep time)*/*Initialize buffer*/int sleeptime,pnum,snum;DWORD *ThreadIdP,*ThreadIdS,i;struct v *countp,*counts;HANDLE *ThreadHandleP,*ThreadHandleS;/*sleeptime=atoi(argv1);pnum=atoi(argv2);snum=atoi(argv3);*/=i+1;ThreadHandlePi=CreateThread(NULL,0,producer,&