Question

大家好我正在研究一个Thread类和一个CountingThread类，它来自Thread类，包括使用库的同步计数器。但是在创建这个CountingThread类时，我遇到了“不允许不完整类型”的问题所以如果你在一个糟糕的结构中形成这个Thread抽象类或者说我做错了什么的话你会给我一些建议我会很高兴的。（仅供参考，我必须保留课程和方法，因为这是一项任务）

#ifndef _THREAD_H_
#define _THREAD_H_

#include <Windows.h>
#include <iosfwd>

class Thread{
private:
    HANDLE hThread;
    int idThread;

public:
    Thread(LPTHREAD_START_ROUTINE fnct){  // here I'm trying to get a function and create thread with it
        hThread = CreateThread(NULL, 0,fnct,NULL,0,(LPDWORD)&idThread);
    }

    virtual void main()=0;

    void suspend(){
        SuspendThread(hThread);
    }
    void resume(){
        ResumeThread(hThread);
    }
    void terminate(){
        TerminateThread(hThread,0);
    }

    static void sleep(int sec){
        Sleep(sec*1000);
    }

};


#endif

CountingThread.h

#ifndef _COUNTINGTHREAD_H_
#define _COUNTINGTHREAD_H_

#include "SynchronizedCounter.h"
#include "Thread.h"

class CountingThread :public Thread{
private:
    SynchronizedCounter counter;
public:
    CountingThread(counter.increment()){   // here I'm having the error "incomplete type on counter"
    }    // I want to create thread with the counter.increment function

};

#endif

SynchronizedCounter.h

#ifndef SYNCHRONIZEDCOUNTER_H_
#define SYNCHRONIZEDCOUNTER_H_

#include "Mutex.h"
#include <iosfwd>

class SynchronizedCounter{
private:
    int count;
public:
    SynchronizedCounter();
    SynchronizedCounter(int);
    void increment();
    int value();
    friend std::ostream &operator <<(std::ostream& output, const SynchronizedCounter& counter)
    {
        output << counter.count << endl;
        return output;
    }
};

#endif

和synchronizedCounter :: increment

void SynchronizedCounter::increment(){
    Mutex mut;
    mut.lock;
    count++;
    mut.unlock;
}

Answer 1

似乎是语法错误。你应该在这里定义一个参数：

所以它应该是：

class CountingThread :public Thread{
private:
    SynchronizedCounter counter;
public:
    CountingThread()
        {
        counter.increment())
         //... etc
        }    // I want to create thread with the counter.increment function
//...
};

无论如何，当counter.increment（）返回void时，你不能将它作为参数传递。

<windows.h> c ++线程和继承</windows.h>

1 个答案: