再问服务程序定时执行另一程序的问题。定时器如何生成？

[Shiyl]

如题，如何在控制台程序中生成定时器？如果用settimer的话好像有点问题，最后一个参数是回调函数，这个回调函数如何定义？还有没有其他生成定时器的方法，望告知。
谢谢！

[masterz]

user timer in workthread of console app
#include <windows.h>
#include <stdio.h>
#include <conio.h>
unsigned long WINAPI Thread(PVOID pvoid);
void main()
{
DWORD dwThreadId;
printf("use timer in workthread of console application<masterz>\n");
HANDLE hThread = CreateThread(
NULL, // no security attributes
0, // use default stack size
Thread, // thread function
0, // argument to thread function
0, // use default creation flags
&dwThreadId);
DWORD dwwait=WaitForSingleObject(hThread,1000*30);
switch(dwwait)
{
case WAIT_ABANDONED:
printf("main thread WaitForSingleObject return WAIT_ABANDONED\n");
break;
case WAIT_OBJECT_0:
printf("main thread WaitForSingleObject return WAIT_OBJECT_0\n");
break;
case WAIT_TIMEOUT:
printf("main thread WaitForSingleObject return WAIT_TIMEOUT\n");
break;
}
CloseHandle(hThread);
_getch();
}

unsigned long WINAPI Thread(PVOID pvoid)
{
MSG msg;
PeekMessage(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
UINT timerid=SetTimer(NULL,111,3000,NULL);
BOOL bRet;
int count =0;
while( (bRet = GetMessage( &msg, NULL, 0, 0 )) != 0)
{
if (bRet == -1)
{
// handle the error and possibly exit
}
else
if(msg.message==WM_TIMER)
{
count++;
printf("WM_TIMER in work thread count=%d\n",count);
if(count>4)
break;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
KillTimer(NULL,timerid);
printf("thread end here\n");
return 0;
}

[masterz]

you can also use multiple waitable timer
下面的代码在VC2003中执行，线程会等待10秒
#define _WIN32_WINNT 0x0500

#include <windows.h>
#include <conio.h>
#include <iomanip>
#include <iostream>
#include <process.h>
#include <sstream>
using namespace std;
typedef unsigned (__stdcall *PTHREAD_START) (void *);
#define chBEGINTHREADEX(psa, cbStack, pfnStartAddr, \
pvParam, fdwCreate, pdwThreadId) \
((HANDLE)_beginthreadex( \
(void *) (psa), \
(unsigned) (cbStack), \
(PTHREAD_START) (pfnStartAddr), \
(void *) (pvParam), \
(unsigned) (fdwCreate), \
(unsigned *) (pdwThreadId)))


DWORD WINAPI _ThreadProc(PVOID pvParam);
HANDLE TimeHandle;
void print_now(LPCTSTR msg)
{
std::stringstream ss;
SYSTEMTIME st;
GetLocalTime(&st);
ss<<msg<<" "<<st.wHour<<":"<<st.wMinute<<":"<<st.wSecond<<"."<<st.wMilliseconds<<endl;
cout<<ss.str();
}
int main()
{
SYSTEMTIME stm;
FILETIME ftLocal,ftUTC;
LARGE_INTEGER liUTC;
HANDLE ProcHandle;
DWORD ThreadID;

liUTC.QuadPart=-100000000;
TimeHandle = CreateWaitableTimer(NULL,TRUE,NULL);
print_now(__FUNCTION__);
cout<<"等待10秒....."<<endl;

cout<<"CreateWaitableTimer error code "<<GetLastError()<<std::endl;
SetWaitableTimer(TimeHandle,&liUTC,0,NULL,NULL,0);
cout<<"SetWaitableTimer error code "<<GetLastError()<<std::endl;

ProcHandle=chBEGINTHREADEX(NULL,0,_ThreadProc,NULL,0,&ThreadID);
//CloseHandle(TimeHandle); // this call will activate TimeHandle
CloseHandle(ProcHandle);
cout<<"sleep a minute"<<endl;
print_now(__FUNCTION__);
//Sleep(1*60*1000);
system("pause");

}
DWORD WINAPI _ThreadProc(PVOID pvParam)
{
print_now(__FUNCTION__);
DWORD dw_wait = WaitForSingleObject(TimeHandle,INFINITE);
cout<<__FUNCTION__<<" wait return "<<dw_wait<<endl;
cout<<"报时 "<<endl;
print_now(__FUNCTION__);
return 0;
}

[快乐鹦鹉]

定时器本来就是回调函数。MFC下的OnTimer（）其实就是一个回调函数。你将需要在OnTimer中要做的工作写成一个全局函数，然后将该函数作为定时器的最后一个回调函数参数即可。