問題描述

我在 Win32 C++ 控制臺(tái)程序中處理 CTRL+C 事件時(shí)遇到一些問題.

I have some problems with the handling of CTRL+C events, in a Win32 C++ console program.

基本上我的程序是這樣的:(基于另一個(gè)問題:Windows Ctrl-C - 清理命令行應(yīng)用程序中的本地堆棧對(duì)象)

Basically my program looks like this: (based on this other question: Windows Ctrl-C - Cleaning up local stack objects in command line app)

bool running;

int main() {

    running = true;
    SetConsoleCtrlHandler((PHANDLER_ROUTINE) consoleHandler, TRUE);

    while (running) {
       // do work
       ...
    }

    // do cleanup
    ...

    return 0;
}

bool consoleHandler(int signal) {

    if (signal == CTRL_C_EVENT) {

        running = false;
    }
    return true;
}

問題是根本沒有執(zhí)行清理代碼.

The problem is the cleanup code not being executed at all.

處理函數(shù)執(zhí)行后，進(jìn)程終止，但在主循環(huán)后不執(zhí)行代碼.怎么了?

After the execution of the handler function the process is terminated, but without execute the code after the main loop. What's wrong?

根據(jù)要求，這是一個(gè)類似于我的程序的最小測(cè)試用例:http://pastebin.com/6rLK6BU2

as requested, this is a minimal test case similar to my program: http://pastebin.com/6rLK6BU2

我的輸出中沒有test cleanup-instruction"字符串.

I don't get the "test cleanup-instruction" string in my output.

我不知道這是否重要，我正在使用 MinGW 進(jìn)行編譯.

I don't know if this is important, I'm compiling with MinGW.

EDIT 2: 測(cè)試用例程序的問題是 Sleep() 函數(shù)的使用.沒有它，程序會(huì)按預(yù)期工作.

EDIT 2: The problem with the test case program is the use of the Sleep() function. Without it the program works as expected.

在 Win32 中，函數(shù)處理程序在另一個(gè)線程中運(yùn)行，因此當(dāng)處理程序/線程結(jié)束其執(zhí)行時(shí)，主線程正在休眠.大概這就是進(jìn)程中斷的原因?

In Win32 the function handler runs in another thread, so when the handler/thread ends its execution the main thread is sleeping. Probably this is the cause of process interruption?

推薦答案

以下代碼對(duì)我有用:

#include <windows.h> 
#include <stdio.h> 

BOOL WINAPI consoleHandler(DWORD signal) {

    if (signal == CTRL_C_EVENT)
        printf("Ctrl-C handled
"); // do cleanup

    return TRUE;
}

int main()
{
    running = TRUE;
    if (!SetConsoleCtrlHandler(consoleHandler, TRUE)) {
        printf("
ERROR: Could not set control handler"); 
        return 1;
    }

    while (1) { /* do work */ }

    return 0;
}

這篇關(guān)于在 Win32 上處理 CTRL+C的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！