sleepingtask.cpp

来自「很经典的书籍」· C++ 代码 · 共 44 行

//: C11:SleepingTask.cpp
// Calling sleep() to pause for awhile.
//{L} ZThread
#include <iostream>
#include "zthread/Thread.h"
#include "zthread/ThreadedExecutor.h"
using namespace ZThread;
using namespace std;

class SleepingTask : public Runnable {
  int countDown;
  int id;
public:
  SleepingTask(int ident = 0) : countDown(5), id(ident) {}
  ~SleepingTask() {
    cout << id << " completed" << endl;
  }
  friend ostream&
  operator<<(ostream& os, const SleepingTask& st) {
    return os << "#" << st.id << ": " << st.countDown;
  }
  void run() {
    while(true) {
      try {
        cout << *this << endl;
        if(--countDown == 0) return;
        Thread::sleep(100);
      } catch(Interrupted_Exception& e) {
        cerr << e.what() << endl;
      }
    }
  }
};

int main() {
  try {
    ThreadedExecutor executor;
    for(int i = 0; i < 5; i++)
      executor.execute(new SleepingTask(i));
  } catch(Synchronization_Exception& e) {
    cerr << e.what() << endl;
  }
} ///:~