c++ - WINAPI exception when calling SetConsoleHandler when closing program

Question

I wrote a program that uses multiple threads to obtain some data, and then stores it in an array. Then when I close the console program, an event will be triggered, and then I will write the data in the array to a file in this event. .
But when I run this program for less than 10 minutes, writing files is normal. When I close the program for more than 20 minutes, it will only output some files and then the program will close itself.

The following is the code involving these places:
This is the call to SetConsoleCtrlHandler in the main function

int main(char*argv[], int argc)
{
    //当你关闭的时候做一些处理工作
    SetConsoleCtrlHandler(ConsoleHandler, TRUE);//接受控制台消息，做一些清理工作 
    
    //其他工作
}

This is the specific function implementation

BOOL WINAPI ConsoleHandler(DWORD msgType)
{
    Print("I'm closing\n");
    if (msgType == CTRL_C_EVENT ||msgType == CTRL_CLOSE_EVENT)
    {
        if (g_hTDF)
        {
    
        WriteResult(str);//这里就是我把数组中的内容写入文件的程序

        Print("console Close complete!\n");
        system("pause");
        return TRUE;
    }
 
    return TRUE;
}

Has anyone encountered this problem?
Is this related to the buffer or something? Because intuitively, it may be that more data is received as time goes by.

Answer 1

CTRL_CLOSE_EVENT has a timeout mechanism, so no matter how long it takes to write data, the program will shut down after 5 seconds.
You can use CTRL_C_EVENT instead.