list5-7.cpp

来自「这是c++编程方面的名著的例子代码」· C++ 代码 · 共 39 行

// Listing 5-7
// This program demonstrates the
// use of a global variable Count updated by
// two threads

#include <iostream.h>
#include <process.h>
#include <stddef.h>
#define INCL_DOSPROCESS
#include <os2.h>


int Count = 0;

void threadA(void *X)
{

    Count += 2;
    cout << Count << endl;
}

void threadB(void *X)
{
   Count += 4;
   cout << Count << endl;
}


void main(void)
{
    unsigned long ThreadA;
    unsigned long ThreadB;
    ThreadA = _beginthread(threadA,4096,NULL);
    ThreadB = _beginthread(threadB,4096,NULL);
    DosWaitThread(&ThreadA,DCWW_WAIT);
    DosWaitThread(&ThreadB,DCWW_WAIT);
}