http://blog.csdn.net/feng1790291543
linux多线程实现哲学家问题，根据哲学家吃饭、拿筷子、放下筷子……
首先，主线程使用Qt下的GUI的简单一个按钮控制就行了
maindesttop.cpp
#include "maindesttop.h"#include "ui_maindesttop.h"QMutex mutex01;QMutex mutex02;QMutex mutex03;QMutex mutex04;QMutex mutex05;int n1=1;int n2=1;int n3=1;int n4=1;int n5=1;QWaitCondition waitcondition001;QWaitCondition waitcondition002;QWaitCondition waitcondition003;QWaitCondition waitcondition004;QWaitCondition waitcondition005;MainDestTop::MainDestTop(QWidget *parent) : QWidget(parent), ui(new Ui::MainDestTop){ ui->setupUi(this);}MainDestTop::~MainDestTop(){ delete ui;}void MainDestTop::on_pushButtonStart_clicked(){ pro001=new Proferssor001; pro002=new Professor002; pro003=new Professor003; pro004=new Professor004; pro005=new Professor005; pro001->start(); pro002->start(); pro003->start(); pro004->start(); pro005->start(); return ;}void MainDestTop::StopThread(){ pro001->quit(); pro001->wait(); pro001->deleteLater(); delete pro001; pro001=NULL; pro002->quit(); pro002->wait(); pro002->deleteLater(); delete pro002; pro002=NULL; pro003->quit(); pro003->wait(); pro003->deleteLater(); delete pro003; pro003=NULL; pro004->quit(); pro004->wait(); pro004->deleteLater(); delete pro004; pro004=NULL; pro005- >quit(); pro005->wait(); pro005->deleteLater(); delete pro005; pro005=NULL;}
maindesttop.h
#ifndef MAINDESTTOP_H#define MAINDESTTOP_H#include <QtGui/QWidget>#include <QtCore>#include <QMutex>#include "proferssor001.h"#include "professor002.h"#include "professor003.h"#include "professor004.h"#include "professor005.h"namespace Ui{ class MainDestTop;}class MainDestTop : public QWidget{ Q_OBJECTpublic: MainDestTop(QWidget *parent = 0); ~MainDestTop(); void StopThread();private: Ui::MainDestTop *ui; Proferssor001 *pro001; Professor002 *pro002; Professor003 *pro003; Professor004 *pro004; Professor005 *pro005;private slots: void on_pushButtonStart_clicked();};#endif // MAINDESTTOP_H
其次，子线程源码如下：
#ifndef PROFERSSOR001_H#define PROFERSSOR001_H#include <QThread>#include <QtCore>class Proferssor001 : public QThread{public: Proferssor001(); void run();};#endif // PROFERSSOR001_H
第一个线程源码：
#include "proferssor001.h"/**************** proferssor001---->A proferssor002---->B proferssor003--->C proferssor004---->D proferssor005---->E 资源夺取: A--->1/5 B--->2/1 C--->3/2 D--->4/3 E--->5/4******************/extern QMutex mutex01;extern QMutex mutex02;extern QMutex mutex03;extern QMutex mutex04;extern QMutex mutex05;extern int n1;extern int n2;extern int n3;extern int n4;extern int n5;extern QWaitCondition waitcondition001;extern QWaitCondition waitcondition002;extern QWaitCondition waitcondition003;extern QWaitCondition waitcondition004;extern QWaitCondition waitcondition005;Proferssor001::Proferssor001(){}void Proferssor001::run(){ while(1) { mutex01.lock(); mutex05.lock(); while((n1+n5)<2) { mutex05.unlock(); qDebug()<<"proferssor001哲学家没左边筷子~"; mutex01.unlock(); qDebug()<<"proferssor001哲学家没右边筷子~"; qDebug()<<"proferssor001$$$$$$$$$$哲学家开始休息...."; waitcondition001.wait(&mutex01); waitcondition005.wait(&mutex05); continue ; } qDebug()<<"proferssor001$$$$$$$$$$哲学家开始吃饭~"; n1--; n5--; mutex05.unlock(); n5=(n5+1); qDebug()<<"proferssor001$$$$$$$$$$哲学家放下左边筷子~"; msleep(2); mutex01.unlock(); n1=(n1+1); qDebug()<<"proferssor001$$$$$$$$$$哲学家放下右边筷子~"; msleep(2); } return ;}
第二线程头文件：
#ifndef PROFESSOR002_H#define PROFESSOR002_H#include <QThread>#include <QtCore>class Professor002 : public QThread{public: Professor002(); void run();};#endif // PROFESSOR002_H
源程序：
#include "professor002.h"/**************** proferssor001---->A proferssor002---->B proferssor003--->C proferssor004---->D proferssor005---->E 资源夺取: A--->1/5 B--->2/1 C--->3/2 D--->4/3 E--->5/4******************/extern QMutex mutex01;extern QMutex mutex02;extern QMutex mutex03;extern QMutex mutex04;extern QMutex mutex05;extern int n1;extern int n2;extern int n3;extern int n4;extern int n5;extern QWaitCondition waitcondition001;extern QWaitCondition waitcondition002;extern QWaitCondition waitcondition003;extern QWaitCondition waitcondition004;extern QWaitCondition waitcondition005;Professor002::Professor002(){}void Professor002::run(){ while(1) { mutex02.lock(); mutex01.lock(); while((n1+n2)<2) { mutex01.unlock(); qDebug()<<"proferssor002哲学家没左边筷子~"; mutex02.unlock(); qDebug()<<"proferssor002哲学家没右边筷子~"; qDebug()<<"proferssor002&&&&&&&&&哲学家开始休息...."; waitcondition002.wait(&mutex02); waitcondition001.wait(&mutex01); continue ; } qDebug()<<"proferssor002&&&&&&&&&哲学家开始吃饭~"; n1--; n2--; mutex01.unlock(); n1=(n1+1); qDebug()<<"proferssor002&&&&&&&&&哲学家放下左边筷子~"; msleep(2); mutex02.unlock(); n2=(n2+1); qDebug()<<"proferssor002&&&&&&&&&哲学家放下右边筷子~"; msleep(2); } return ;}
线程三，头文件：
#ifndef PROFESSOR003_H#define PROFESSOR003_H#include <QThread>#include <QtCore>class Professor003 : public QThread{public: Professor003(); void run();};#endif // PROFESSOR003_H
源文件：
#include "professor003.h"/**************** proferssor001---->A proferssor002---->B proferssor003--->C proferssor004---->D proferssor005---->E 资源夺取: A--->1/5 B--->2/1 C--->3/2 D--->4/3 E--->5/4******************/extern QMutex mutex01;extern QMutex mutex02;extern QMutex mutex03;extern QMutex mutex04;extern QMutex mutex05;extern int n1;extern int n2;extern int n3;extern int n4;extern int n5;extern QWaitCondition waitcondition001;extern QWaitCondition waitcondition002;extern QWaitCondition waitcondition003;extern QWaitCondition waitcondition004;extern QWaitCondition waitcondition005;Professor003::Professor003(){}void Professor003::run(){ while(1) { mutex03.lock(); mutex02.lock(); while((n2+n3)<2) { mutex02.unlock(); qDebug()<<"proferssor003哲学家没左边筷子~"; mutex03.unlock(); qDebug()<<"proferssor003哲学家没右边筷子~"; qDebug()<<"proferssor003******哲学家开始休息...."; waitcondition003.wait(&mutex03); waitcondition002.wait(&mutex02); continue ; } qDebug()<<"proferssor003******哲学家开始吃饭~"; n2--; n3--; mutex02.unlock(); n2=(n2+1); qDebug()<<"proferssor003******哲学家放下左边筷子~"; msleep(2); mutex03.unlock(); n3=(n3+1); qDebug()<<"proferssor003******哲学家放下右边筷子~"; msleep(2); } return ;}
线程4头文件：
#ifndef PROFESSOR004_H#define PROFESSOR004_H#include <QThread>#include <QtCore>class Professor004 : public QThread{public: Professor004(); void run();};#endif // PROFESSOR004_H
源文件：
#include "professor004.h"/**************** proferssor001---->A proferssor002---->B proferssor003--->C proferssor004---->D proferssor005---->E 资源夺取: A--->1/5 B--->2/1 C--->3/2 D--->4/3 E--->5/4******************/extern QMutex mutex01;extern QMutex mutex02;extern QMutex mutex03;extern QMutex mutex04;extern QMutex mutex05;extern int n1;extern int n2;extern int n3;extern int n4;extern int n5;extern QWaitCondition waitcondition001;extern QWaitCondition waitcondition002;extern QWaitCondition waitcondition003;extern QWaitCondition waitcondition004;extern QWaitCondition waitcondition005;Professor004::Professor004(){}void Professor004::run(){ while(1) { mutex04.lock(); mutex03.lock(); while((n4+n3)<2) { mutex03.unlock(); qDebug()<<"proferssor004哲学家没左边筷子~"; mutex04.unlock(); qDebug()<<"proferssor004哲学家没右边筷子~"; qDebug()<<"proferssor004----哲学家开始休息...."; waitcondition004.wait(&mutex04); waitcondition003.wait(&mutex03); continue ; } qDebug()<<"proferssor004----哲学家开始吃饭~"; n3--; n4--; mutex03.unlock(); n3=(n3+1); qDebug()<<"proferssor004----哲学家放下左边筷子~"; msleep(2); mutex04.unlock(); n4=(n4+1); qDebug()<<"proferssor004----哲学家放下右边筷子~"; msleep(2); } return ;}
线程5头文件：
#ifndef PROFESSOR005_H#define PROFESSOR005_H#include <QThread>#include <QtCore>class Professor005 : public QThread{public: Professor005(); void run();};#endif // PROFESSOR005_H
源文件：
#include "professor005.h"/**************** proferssor001---->A proferssor002---->B proferssor003--->C proferssor004---->D proferssor005---->E 资源夺取: A--->1/5 B--->2/1 C--->3/2 D--->4/3 E--->5/4******************/extern QMutex mutex01;extern QMutex mutex02;extern QMutex mutex03;extern QMutex mutex04;extern QMutex mutex05;extern int n1;extern int n2;extern int n3;extern int n4;extern int n5;extern QWaitCondition waitcondition001;extern QWaitCondition waitcondition002;extern QWaitCondition waitcondition003;extern QWaitCondition waitcondition004;extern QWaitCondition waitcondition005;Professor005::Professor005(){}void Professor005::run(){ while(1) { mutex05.lock(); mutex04.lock(); while((n4+n5)<2) { mutex04.unlock(); qDebug()<<"proferssor005哲学家没左边筷子~"; mutex05.unlock(); qDebug()<<"proferssor005哲学家没右边筷子~"; qDebug()<<"proferssor005====哲学家开始休息...."; waitcondition005.wait(&mutex05); waitcondition004.wait(&mutex04); continue ; } qDebug()<<"proferssor005====哲学家开始吃饭~"; n4--; n5--; mutex04.unlock(); n4=(n4+1); qDebug()<<"proferssor005====哲学家放下左边筷子~"; msleep(2); mutex05.unlock(); n5=(n5+1); qDebug()<<"proferssor005====哲学家放下右边筷子~"; msleep(2); } return ;}
运行结果：
资源免费下载：http://download.csdn.net/detail/feng1790291543/7324039
“但行好事，莫问前程”，往往成功的几率反而更大些;
