信号量

#include <windows.h>
#include <stdio.h>            
#include "resource.h"    
            
HANDLE hSemaphore;                
HANDLE hThread[3];                
HWND hEditSet;                
HWND hEdit1;                
HWND hEdit2;                
HWND hEdit3;
                
DWORD WINAPI ThreadProc1(LPVOID lpParameter)                
{                
    TCHAR szBuffer[10];            
    DWORD dwTimmer=0;            
    WaitForSingleObject(hSemaphore, INFINITE);            
    while(dwTimmer<100)            
    {            
        Sleep(100);        
        memset(szBuffer,0,10);        
        GetWindowText(hEdit1,szBuffer,10);        
        sscanf( szBuffer, "%d", &dwTimmer );        
        dwTimmer++;        
        memset(szBuffer,0,10);        
        sprintf(szBuffer,"%d",dwTimmer);        
        SetWindowText(hEdit1,szBuffer);        
    }            
    ReleaseSemaphore(hSemaphore, 1, NULL);            
    return 0;            
}    
            
DWORD WINAPI ThreadProc2(LPVOID lpParameter)                
{                
    TCHAR szBuffer[10];            
    DWORD dwTimmer=0;            
    WaitForSingleObject(hSemaphore, INFINITE);            
    while(dwTimmer<100)            
    {            
        Sleep(100);        
        memset(szBuffer,0,10);        
        GetWindowText(hEdit2,szBuffer,10);        
        sscanf( szBuffer, "%d", &dwTimmer );        
        dwTimmer++;        
        memset(szBuffer,0,10);        
        sprintf(szBuffer,"%d",dwTimmer);        
        SetWindowText(hEdit2,szBuffer);        
    }            
    ReleaseSemaphore(hSemaphore, 1, NULL);            
    return 0;            
}    
            
DWORD WINAPI ThreadProc3(LPVOID lpParameter)                
{                
    TCHAR szBuffer[10];            
    DWORD dwTimmer=0;            
    WaitForSingleObject(hSemaphore, INFINITE);            
    while(dwTimmer<100)            
    {            
        Sleep(100);        
        memset(szBuffer,0,10);        
        GetWindowText(hEdit3,szBuffer,10);        
        sscanf( szBuffer, "%d", &dwTimmer );        
        dwTimmer++;        
        memset(szBuffer,0,10);        
        sprintf(szBuffer,"%d",dwTimmer);        
        SetWindowText(hEdit3,szBuffer);        
    }            
    ReleaseSemaphore(hSemaphore, 1, NULL);            
    return 0;            
}    
            
DWORD WINAPI ThreadBegin(LPVOID lpParameter)                
{                
    TCHAR szBuffer[10];            
    DWORD dwMoney=0;            
                            
    hSemaphore = CreateSemaphore(NULL,0,3,NULL);    //初始信号量为0,最大信号量为3        
                
    hThread[0] = ::CreateThread(NULL, 0, ThreadProc1,NULL, 0, NULL);            
    hThread[1] = ::CreateThread(NULL, 0, ThreadProc2,NULL, 0, NULL);            
    hThread[2] = ::CreateThread(NULL, 0, ThreadProc3,NULL, 0, NULL);            
                            
    while(dwMoney<1000)            
    {            
        memset(szBuffer,0,10);        
        GetWindowText(hEditSet,szBuffer,10);        
        sscanf( szBuffer, "%d", &dwMoney );        
        dwMoney++;        
        memset(szBuffer,0,10);        
        sprintf(szBuffer,"%d",dwMoney);        
        SetWindowText(hEditSet,szBuffer);        
    }            
    ReleaseSemaphore(hSemaphore, 2, NULL);        //释放2个信号量；可以使等待hSemaphore的2个线程开始运行；    
                
    ::WaitForMultipleObjects(3, hThread,TRUE,INFINITE);            //当3个线程运行完后会自动进入已通知状态，此时关闭信号量
    ::CloseHandle(hSemaphore);            
                
    return 0;            
}    
            
BOOL CALLBACK MainDlgProc(HWND hDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)                
{                
    BOOL bRet = FALSE;            
                
    switch(uMsg)            
    {            
    case WM_CLOSE:            
        {        
            EndDialog(hDlg,0);    
            break;    
        }        
    case WM_INITDIALOG:            
        {        
            hEditSet = GetDlgItem(hDlg,IDC_EDIT1);    
            hEdit1 = GetDlgItem(hDlg,IDC_EDIT2);    
            hEdit2 = GetDlgItem(hDlg,IDC_EDIT3);    
            hEdit3 = GetDlgItem(hDlg,IDC_EDIT4);    
                
            SetWindowText(hEditSet,"0");    
            SetWindowText(hEdit1,"0");    
            SetWindowText(hEdit2,"0");    
            SetWindowText(hEdit3,"0");    
                
            break;    
        }        
    case WM_COMMAND:            
                
        switch (LOWORD (wParam))        
        {        
        case IDC_BUTTON1:        
            {    
                CreateThread(NULL, 0, ThreadBegin,NULL, 0, NULL);
                
                return TRUE;
            }    
        }        
        break ;        
    }            
                
    return bRet;            
}                
int APIENTRY WinMain(HINSTANCE hInstance,                
                     HINSTANCE hPrevInstance,                
                     LPSTR     lpCmdLine,                
                     int       nCmdShow)                
{                            
    DialogBox(hInstance,MAKEINTRESOURCE(IDD_MAIN),NULL,MainDlgProc);            
    return 0;            
}