1、實(shí)驗(yàn)三：生產(chǎn)者與消費(fèi)者實(shí)驗(yàn)?zāi)康?. 學(xué)習(xí)和掌握操作系統(tǒng)中進(jìn)程之間的通信；2. 理解和掌握使用信號(hào)量機(jī)制來(lái)是想進(jìn)程之間的同步和互斥；3. 學(xué)習(xí)使用創(chuàng)建文件對(duì)象，并利用文件映射對(duì)象來(lái)實(shí)現(xiàn)數(shù)據(jù)通信。二、實(shí)驗(yàn)容10? 一個(gè)大小為6的緩沖區(qū)，初始為空，每個(gè)緩沖區(qū)能存放一個(gè)長(zhǎng)度若為 個(gè)字符的字符串。? 2個(gè)生產(chǎn)者-隨機(jī)等待一段時(shí)間，往緩沖區(qū)添加數(shù)據(jù)，-若緩沖區(qū)已滿，等待消費(fèi)者取走數(shù)據(jù)后再添加 -重復(fù)12次? 3個(gè)消費(fèi)者-隨機(jī)等待一段時(shí)間，從緩沖區(qū)讀取數(shù)據(jù)-若緩沖區(qū)為空，等待生產(chǎn)者添加數(shù)據(jù)后再讀取 -重復(fù)8次說明：?顯示每次添加和讀取數(shù)據(jù)的時(shí)間及緩沖區(qū)的狀態(tài)?生產(chǎn)者和消費(fèi)者用進(jìn)程模擬，緩沖區(qū)用共享存來(lái)實(shí)現(xiàn)三

2、、實(shí)驗(yàn)環(huán)境1. Windows下：Win dows8 ,Visual studio 20132. Linux 下:Linux Ubuntu 4，gcc四、程序設(shè)計(jì)與實(shí)現(xiàn)1. Win dows 下：A.主要函數(shù)說明：(1) PROCESSNF ORMATIONStartClo ne(i ntn Clo nelD) 功能：用來(lái)創(chuàng)建5個(gè)相同的進(jìn)程，前兩個(gè)為生產(chǎn)者，后 三兩個(gè)為消費(fèi)者，賦予其不同的ID值，返回進(jìn)程的信 息。（2）CreateSemaphore（）；功能：創(chuàng)建3個(gè)信號(hào)量：full ，empty，mutex。來(lái)互斥 的訪問緩沖區(qū)，實(shí)現(xiàn)通信。（3）CreateFileM appi ng （）

3、功能：在當(dāng)前運(yùn)行的進(jìn)程中創(chuàng)建文件映射對(duì)象，來(lái)模擬共享緩沖區(qū)MapViewOfFile （）功能：在此文件映射上創(chuàng)建視圖映射到當(dāng)前應(yīng)用程序的 地址空間B 程序流程圖開始初始化：創(chuàng)建的子進(jìn)程個(gè)數(shù)為 0nClo ne=0;申請(qǐng)緩沖區(qū)P(empty)P(mutex)0n Clo ne32n Clo ne6申請(qǐng)緩沖區(qū)把產(chǎn)品放入緩沖 區(qū)：將0置為1釋放緩沖區(qū):V(mutex)V(full)隨機(jī)等待Y12次放完了？nClone=?P(full)P(mutex)創(chuàng)建3個(gè)信號(hào)量：full ,empty,mutex1創(chuàng)建共享內(nèi)存1T等待子進(jìn)程執(zhí)行 完畢1It釋放緩沖區(qū)：V(mutex)V(empty)1隨機(jī)等待N

4、從緩沖區(qū)取產(chǎn) 品：將1置為0Y12次取完了？結(jié)束每個(gè)子進(jìn)程結(jié)束實(shí)驗(yàn)代碼如下：Win dows：/實(shí)驗(yàn)三.cpp :定義控制臺(tái)應(yīng)用程序的入口點(diǎn)創(chuàng)建5個(gè)相同nClon e+司的子進(jìn)程/#i nclude stdafx.h #i nclude #in elude #in elude static HANDLEMutexMappi ng=INVALID HANDLE VAL;UEint num=O;HANDLBpHa ndle10;struct bufint num;int read;int write;int buffer5;BOOIStartClo ne()int i;BOOlbCreateOK;

5、PROCESS_INFORMATpONTCHAzFilename MAX PATHGetModuleFileName(NULLszFilename, MAX PAT)HTCHARzCmdLine MAX_PATHfor ( i = 0; i 3; i+)spri ntf(szCmdL ine,%s con sumer %d ,szFile name,i);STARTUPINFO;ZeroMemory( reinterpret cast(&si), sizeof (si);si.cb=sizeof (si);bCreateOK二CreateProcess (szFile name,szCmdLi

6、 ne,NULLNULLFALSE,CREATE_DEFAULT_ERROR_MODENULLNULL&si,&pi);if (!bCreateOK)return false ;IpHa ndle num =pi.hProcess;nu m+;for ( i = 0; i 2; i+)spri ntf(szCmdL ine,%s productor %d ,szFile name,i);STARTUPINFO;ZeroMemo以 re in terpret_cast(&si), sizeof (si);si.cb= sizeof (si);bCreateOK二CreateProcess (sz

7、File name,szCmdLi ne,FALSECREATE_DEFAULT_ERROR_MODE&si,&pi);if (!bCreateOK)return falseIpHa ndle num =pi.hProcess;nu m+;return true ;void Parent()printf( Creati ng the child process and waited child process to quit.n );hMutexMapping二 CreateMutex (NULL true , mutex);HANDLEMapping二 CreateFileMapping (

8、NULLNULLPAGE_READWRITE0,sizeof (LONG map);if (hMapping!二 INVALID_HANDLE_VAL)JELPVOIDpData二MapViewOfFile(hMapp ing,FILE_MAP_ALL_ACCESS0)；if (pData!二 NULLZeroMemory(pData, sizeof (LONG;struct buf *pn Data= rein terpret castvstruct buf*(pData);pn Data-read=O;pn Data-write=0;pn Data-num=0;memset(pnData-

9、buffer,O,sizeof (pnData-buffer);Unm apViewOfFile(pData);CreateSemaphore( NULL3,3, EMPTY);CreateSemaphore( NULL0,3, FULL);BOOlbCreateOK二StartClo ne();if (!bCreateOK)/pri ntf(Create child process failed. n);elsepri ntf(Create child process success. n);ReleaseMutex(hMutexMappi ng);void Productor( int n

10、)int j;printf( Productor is runnin g.n);hMutexMapping= OpenMuteX MUTEX_ALL_ACCEST8e , mutex);HANDLEMapping=OpenFileMapping (FILE MAP ALL ACCESSNULL map);if (hMapping二二 INVALID HANDLE VAL)JEprin tf(error n );HANDLEemEmpty =Ope nSemaphoreSEMAPHORE_ALL_ACCEASSEEMPTY);HANDLEemFull =Ope nSemaphoreSEMAPHO

11、RE ALL ACCEASSEFULL);for ( int i = 0; i 6; i+)WaitForSi ngleObject(semEmpty,INFINITE);SY STEMTIMSt;GetSystemTime(&st);srand(unsigned )time(0);Sleep(ra nd()/6);WaitForSi ngleObject(hMutexMappi ng,INFINITE);LPVOIDpFile二MapViewOfFile(hMapp ing,FILE_MAP_ALL_ACCESS0);if (pFile!二 NULLstruct buf *pn Data=

12、rein terpret_cast (pFile);pn Data-bufferp nData-write=1;pn Data-write=(p nData-write+1)%3;pn Data-nu m+;printf(%02d:%02d:%02d生產(chǎn)者%d生產(chǎn)成功緩沖區(qū)中剩余 %個(gè) ,st.wHour,st.wMinute,st.wSecond,n,pnData-num);for (j = 0; j bufferj);printf(n);匸Unm apViewOfFile(pFile);pFile=NULLReleaseSemaphore(semFull, 1,NULL;ReleaseMu

13、tex(hMutexMappi ng);printf(生產(chǎn)者%d生產(chǎn)完畢n , n);void Consumer( int n)int j;printf(Con sumer is runnin g.n);hMutexMapping= OpenMuteX MUTEX ALL ACCESr8e , mutex);HANDLEMapping=OpenFileMapping (FILE MAP ALL ACCESSNULLmap);if (hMapping二二 INVALID_HANDLE_VAL)JEprintf( error n );HANDLEemEmpty =Ope nSemaphoreSEM

14、APHORE ALL ACCESSSEEMPTY);HANDLEemFull =Ope nSemaphoreSEMAPHORE_ALL_ACCEASSEFULL);for ( int i = 0; i (pFile);pn Data-bufferp nData-read=O;pn Data-read=(p nData-read+1)%3;pnData-num-;printf(%02d:%02d:%02d消費(fèi)者%d消費(fèi)成功緩沖區(qū)中剩余 %個(gè) ,st.wHour,st.wMinute,st.wSecond,n,pnData-num);for (j = 0; j bufferj);printf(n)

15、;Unm apViewOfFile(pFile);pFile= NULLReleaseSemaphore(semEmpty,1, NULL；ReleaseMutex(hMutexMappi ng);printf( 消費(fèi)者%d消費(fèi)完畢n , n);匚int main( int argc , char * argv)if ( argc1 &strcmp(argv1, productor )=0)Productor(atoi(argv 2);else if ( argc 1 &strcmp(argv 1, consumer )=0)Consumer(atoi(argv 2);elsePare nt(

16、);WaitForMultipleObjects(num,lpHandle,true , INFINITE); return 0;Linux下代碼:/主進(jìn)程#in elude #i nclude #in elude head.hint mai n()創(chuàng)建信號(hào)量集合int id = semget(SEM_ALL_KEY, 3, IPC_CREAT|0660);/初始化信號(hào)量集合semctl(id, SEM_EMPTY, SETVAL, 3);semctl(id, SEM_FULL, SETVAL, 0);semctl(id, SEM_MUTEX, SETVAL, 1);int shmid = c

17、reateQueue();/ 創(chuàng)建共享主存if(shmid0)perror(create shm error.);exit(1);/生成生產(chǎn)者進(jìn)程if(fork()=0)execl(producer, produced, 0);if(fork()=0)execl(producer, produced, 0);/生成消費(fèi)者進(jìn)程if(fork()=0)execl(c on sumer, con sumerl, 0);if(fork()=0)execl(c on sumer, con sumer2, 0);if(fork()=0)execl(c on sumer, con sumer3, 0);/等

18、待子進(jìn)程int stat,i;for(i=0;i5;i+)wait(&stat);removeQueue(shmid);/ 釋放共享主存return 0;/*生產(chǎn)者*/#in clude head.hmain (i nt argc,char * argv)struct queue *buf,*out;int semd = semget(SEM_ALL_KEY,3, IPC_CREAT|0660);int i,j;buf = getQueue();/ 打開共享主存out = buf;for(i=0;ibuf+;/ 產(chǎn)品數(shù) +1(buf + buf-buf) -buf = 1; /放入產(chǎn)品后緩沖區(qū)

19、置1/獲取當(dāng)前時(shí)間struct timeval curtime;gettimeofday(&curtime,NULL);/輸出信息printf(No.%s put product %ld:%ld ,argv0,curtime.tv_sec,curtime.tv_usec);prin tf(Now the buffer is );for(j=1;jbuf);prin tf(n);v(semd, SEM_MUTEX); /V(MUTEX)v(semd, SEM_FULL); /V(FULL)，釋放一個(gè) FULL,即往里面寫了一個(gè)數(shù)據(jù)/隨機(jī)sleep 一會(huì)int ran=ran dom()%5;sl

20、eep(ra n);/*消費(fèi)者*/#in clude head.hmain (i nt argc,char * argv)struct queue *buf,*out;int semd = semget(SEM_ALL_KEY, 3, IPC_CREAT|0660);int i,j;buf = getQueue();打開共享主存out = buf;for(i=0;ibuf) -buf = 0; /取出產(chǎn)品后緩沖區(qū)置0buf-buf-; / 產(chǎn)品數(shù)-1/獲取當(dāng)前時(shí)間struct timeval curtime;gettimeofday(&curtime,NULL);/輸出信息printf(No.

21、%s get product %ld:%ld ,argv0,curtime.tv_sec,curtime.tv_usec);prin tf(Now the buffer is );for(j=1;jbuf);prin tf(n);v(semd, SEM_MUTEX);/V(MUTEX)v(sem_id, SEM_EMPTY);/V(EMPTY)/隨機(jī)等待一段時(shí)間int ran=ran dom()%5; sleep(ra n);Windows運(yùn)行截圖:reating nsutmertlie cliild process is running.and ualted clkild process t

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