Windows

Question

我尝试使用CreateTimerQueueTimer()来控制C中串行端口的轮询。我对Windows API几乎没有经验，因此我开始使用here中的基本示例。由于某些原因，即使包含WAITORTIMERCALLBACK和windows.h并且识别了所有API调用（winbase.h等），也无法识别（未声明）CreateTimerQueue()。

相关代码如下

头：

//serial.h

....

#ifdef _WIN32
#include <windows.h>
#include <winbase.h>
#endif

....

和源文件：

//serial.c

VOID CALLBACK port_polling_win(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    //stuff will happen here
}

int create_polling_thread(serial_port *comport)
{
#ifdef _WIN32
    HANDLE gDoneEvent;
    HANDLE hTimer = NULL;
    HANDLE hTimerQueue = NULL;
    int arg = 123;

    // Use an event object to track the TimerRoutine execution
    gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    if (NULL == gDoneEvent)
    {
        printf("CreateEvent failed (%d)\n", GetLastError());
        return 1;
    }

    // Create the timer queue.
    hTimerQueue = CreateTimerQueue();
    if (NULL == hTimerQueue)
    {
        printf("CreateTimerQueue failed (%d)\n", GetLastError());
        return 2;
    }

    // Set a timer to call the timer routine in TIMER_RESOLUTION_MS miliseconds
    if (!CreateTimerQueueTimer(&hTimer, hTimerQueue, (WAITORTIMERCALLBACK) port_polling_win, &arg, TIMER_RESOLUTION_MS, 0, 0))
    {
        printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
        return 3;
    }
#else
    ....
#endif
return 0;
}

我尝试将port_polling_win()声明为VOID WAITORTIMERCALLBACK，WAITORTIMERCALLBACK和void WAITORTIMERCALLBACK，因此CreateTimerQueueTimer()中的演员阵容不是必要的，但无济于事。 WAITORTIMERCALLBACK在任何地方都无法识别。

仅供参考，我在64位Win7上使用MinGW GCC进行构建。

编辑：如果有的话，孤立的例子也不起作用：

/*
 * main.c
 */

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

HANDLE gDoneEvent;

VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    if (lpParam == NULL)
    {
        printf("TimerRoutine lpParam is NULL\n");
    }
    else
    {
        // lpParam points to the argument; in this case it is an int

        printf("Timer routine called. Parameter is %d.\n",
                *(int*)lpParam);
        if(TimerOrWaitFired)
        {
            printf("The wait timed out.\n");
        }
        else
        {
            printf("The wait event was signaled.\n");
        }
    }

    SetEvent(gDoneEvent);
}

int main()
{
    HANDLE hTimer = NULL;
    HANDLE hTimerQueue = NULL;
    int arg = 123;

    // Use an event object to track the TimerRoutine execution
    gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    if (NULL == gDoneEvent)
    {
        printf("CreateEvent failed (%d)\n", GetLastError());
        return 1;
    }

    // Create the timer queue.
    hTimerQueue = CreateTimerQueue();
    if (NULL == hTimerQueue)
    {
        printf("CreateTimerQueue failed (%d)\n", GetLastError());
        return 2;
    }

    // Set a timer to call the timer routine in 10 seconds.
    if (!CreateTimerQueueTimer( &hTimer, hTimerQueue,
            (WAITORTIMERCALLBACK)TimerRoutine, &arg , 10000, 0, 0))
    {
        printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
        return 3;
    }

    // TODO: Do other useful work here

    printf("Call timer routine in 10 seconds...\n");

    // Wait for the timer-queue thread to complete using an event
    // object. The thread will signal the event at that time.

    if (WaitForSingleObject(gDoneEvent, INFINITE) != WAIT_OBJECT_0)
        printf("WaitForSingleObject failed (%d)\n", GetLastError());

    CloseHandle(gDoneEvent);

    // Delete all timers in the timer queue.
    if (!DeleteTimerQueue(hTimerQueue))
        printf("DeleteTimerQueue failed (%d)\n", GetLastError());

    return 0;
}

EDIT2： 我发现WAITORTIMERCALLBACK winbase.h中的_WIN32_WINNT >= 0X0500是#define _WIN32_WINNT 0x0500的{​​{1}}。在所有#include之后添加char hex[] = "0123456789abcdef"; void printHex(unsigned char byte) { printf("%c%c", hex[byte>>4], hex[byte&0xf]); } 到我的孤立示例的序言中并没有改变一件事。