每N秒做一些与Windows系统时钟同步的事情

看看从现在到下次你应该醒来的时间，然后在这段时间内睡觉。因此，与其设置一个重复的计时器，每n秒触发一次，不如在每次醒来时设置一个一次性的计时器，不管你现在和时间轴上的下一个点之间需要多长时间。

更新:我已经写了一个测试程序，看看一个重复的计时器是否会漂移。

程序在下一分钟开始时启动，然后每5秒唤醒一次:

#include <windows.h>
#include<stdio.h>
ULONGLONG convertTime(SYSTEMTIME st) {
    FILETIME ft;
    ULARGE_INTEGER tm;
    SystemTimeToFileTime(&st, &ft);
    tm.u.LowPart = ft.dwLowDateTime;
    tm.u.HighPart = ft.dwHighDateTime;
    return tm.QuadPart;
}
ULONGLONG getNextMinute() {
    SYSTEMTIME now;
    GetSystemTime(&now);
    ULONGLONG ONE_MINUTE = 60 * 10000000;
    ULONGLONG nowNumeric = convertTime(now);
    ULONGLONG desiredTime = ((ULONGLONG)(nowNumeric / ONE_MINUTE)) * ONE_MINUTE + ONE_MINUTE;
    return desiredTime;
}
int main(int argc, char* argv[]) {
    ULONGLONG startTimeForTimer = getNextMinute();
    HANDLE hTimer = NULL;
    hTimer = CreateWaitableTimer(NULL, FALSE, NULL);
    if (NULL == hTimer) {
        printf("CreateWaitableTimer failed (%d)n", GetLastError());
        return 1;
    }
    printf("Waiting for the next minute to start...n");
    // Set a timer to wait for 5 seconds.
    if (!SetWaitableTimer(hTimer, &startTimeForTimer, 5000, NULL, NULL, 0))
    {
        printf("SetWaitableTimer failed (%d)n", GetLastError());
        return 2;
    }
    // Wait for the timer.
    SYSTEMTIME beforeTime;
    SYSTEMTIME afterTime;
    GetSystemTime(&beforeTime);
    while (WaitForSingleObject(hTimer, INFINITE) == WAIT_OBJECT_0) {
        GetSystemTime(&afterTime);
        ULONGLONG elapsedTime = convertTime(afterTime) - convertTime(beforeTime);
        printf("Timer was signaled: elapsed=%I64u, seconds=%02d.%02dn", elapsedTime, afterTime.wSecond, afterTime.wMilliseconds);
        GetSystemTime(&beforeTime);
    }
    return 0;
}

下面是运行一段时间后的结果(删除了一些无趣的部分)。seconds=位是当前分钟后的秒数(小至千分之一秒):

Timer was signaled: elapsed=297650000, seconds=59.98
Timer was signaled: elapsed=50000000, seconds=04.986
Timer was signaled: elapsed=50000000, seconds=09.986
Timer was signaled: elapsed=50000000, seconds=14.986
Timer was signaled: elapsed=50000000, seconds=19.986
...
Timer was signaled: elapsed=50000000, seconds=09.986
Timer was signaled: elapsed=49990000, seconds=14.985
Timer was signaled: elapsed=50000000, seconds=19.985
...
Timer was signaled: elapsed=50000000, seconds=24.985
Timer was signaled: elapsed=49990000, seconds=29.984
...
Timer was signaled: elapsed=50000000, seconds=54.973
Timer was signaled: elapsed=50000000, seconds=59.973
Timer was signaled: elapsed=50000000, seconds=04.973
Timer was signaled: elapsed=49990000, seconds=09.972
Timer was signaled: elapsed=50000000, seconds=14.972
Timer was signaled: elapsed=50000000, seconds=19.972
Timer was signaled: elapsed=50000000, seconds=24.972
Timer was signaled: elapsed=50020000, seconds=29.974
Timer was signaled: elapsed=50020000, seconds=34.976
Timer was signaled: elapsed=50020000, seconds=39.978
Timer was signaled: elapsed=50020000, seconds=44.980
Timer was signaled: elapsed=50020000, seconds=49.982
Timer was signaled: elapsed=50020000, seconds=54.984
Timer was signaled: elapsed=50010000, seconds=59.985
Timer was signaled: elapsed=50020000, seconds=04.987
Timer was signaled: elapsed=50020000, seconds=09.989
Timer was signaled: elapsed=50020000, seconds=14.991
Timer was signaled: elapsed=50020000, seconds=19.993
Timer was signaled: elapsed=50020000, seconds=24.995
Timer was signaled: elapsed=50020000, seconds=29.997
Timer was signaled: elapsed=50020000, seconds=34.999
Timer was signaled: elapsed=50020000, seconds=40.01
Timer was signaled: elapsed=50020000, seconds=45.03
Timer was signaled: elapsed=50020000, seconds=50.05
Timer was signaled: elapsed=50020000, seconds=55.07
Timer was signaled: elapsed=50020000, seconds=00.09
Timer was signaled: elapsed=50010000, seconds=05.10
Timer was signaled: elapsed=50020000, seconds=10.12
Timer was signaled: elapsed=50020000, seconds=15.14
Timer was signaled: elapsed=50020000, seconds=20.16
Timer was signaled: elapsed=50020000, seconds=25.18
Timer was signaled: elapsed=50020000, seconds=30.20
Timer was signaled: elapsed=50020000, seconds=35.22
Timer was signaled: elapsed=50020000, seconds=40.24
Timer was signaled: elapsed=50020000, seconds=45.26
Timer was signaled: elapsed=50020000, seconds=50.28
Timer was signaled: elapsed=50020000, seconds=55.30
Timer was signaled: elapsed=50020000, seconds=00.32
Timer was signaled: elapsed=50010000, seconds=05.33
Timer was signaled: elapsed=50020000, seconds=10.35
Timer was signaled: elapsed=50020000, seconds=15.37
Timer was signaled: elapsed=50020000, seconds=20.39
Timer was signaled: elapsed=50020000, seconds=25.41
Timer was signaled: elapsed=50020000, seconds=30.43
Timer was signaled: elapsed=50020000, seconds=35.45
Timer was signaled: elapsed=50020000, seconds=40.47
Timer was signaled: elapsed=50020000, seconds=45.49
Timer was signaled: elapsed=50020000, seconds=50.51
Timer was signaled: elapsed=50020000, seconds=55.53
Timer was signaled: elapsed=50170000, seconds=00.70
Timer was signaled: elapsed=49870000, seconds=05.57
Timer was signaled: elapsed=50010000, seconds=10.58
Timer was signaled: elapsed=50020000, seconds=15.60
Timer was signaled: elapsed=50020000, seconds=20.62
Timer was signaled: elapsed=50020000, seconds=25.64
Timer was signaled: elapsed=50020000, seconds=30.66
Timer was signaled: elapsed=50020000, seconds=35.68
Timer was signaled: elapsed=50020000, seconds=40.70
Timer was signaled: elapsed=50020000, seconds=45.72
Timer was signaled: elapsed=50020000, seconds=50.74
Timer was signaled: elapsed=50020000, seconds=55.76
Timer was signaled: elapsed=50020000, seconds=00.78
Timer was signaled: elapsed=50020000, seconds=05.80
Timer was signaled: elapsed=50010000, seconds=10.81
Timer was signaled: elapsed=50020000, seconds=15.83
Timer was signaled: elapsed=50020000, seconds=20.85
Timer was signaled: elapsed=50020000, seconds=25.87
Timer was signaled: elapsed=50010000, seconds=30.88
Timer was signaled: elapsed=50010000, seconds=35.89
Timer was signaled: elapsed=50000000, seconds=40.89
Timer was signaled: elapsed=50010000, seconds=45.90
Timer was signaled: elapsed=50010000, seconds=50.91
Timer was signaled: elapsed=50000000, seconds=55.91
Timer was signaled: elapsed=50010000, seconds=00.92
Timer was signaled: elapsed=50010000, seconds=05.93
Timer was signaled: elapsed=50000000, seconds=10.93
Timer was signaled: elapsed=50010000, seconds=15.94
Timer was signaled: elapsed=50010000, seconds=20.95
Timer was signaled: elapsed=50000000, seconds=25.95
Timer was signaled: elapsed=50010000, seconds=30.96
Timer was signaled: elapsed=50010000, seconds=35.97
Timer was signaled: elapsed=50000000, seconds=40.97
Timer was signaled: elapsed=50010000, seconds=45.98
Timer was signaled: elapsed=50010000, seconds=50.99
Timer was signaled: elapsed=50000000, seconds=55.99
Timer was signaled: elapsed=50010000, seconds=00.100
Timer was signaled: elapsed=50010000, seconds=05.101
Timer was signaled: elapsed=50000000, seconds=10.101
Timer was signaled: elapsed=50010000, seconds=15.102
Timer was signaled: elapsed=50010000, seconds=20.103
Timer was signaled: elapsed=50010000, seconds=25.104
Timer was signaled: elapsed=50000000, seconds=30.104
Timer was signaled: elapsed=50010000, seconds=35.105
Timer was signaled: elapsed=50010000, seconds=40.106
Timer was signaled: elapsed=50000000, seconds=45.106
Timer was signaled: elapsed=50010000, seconds=50.107
Timer was signaled: elapsed=50010000, seconds=55.108
Timer was signaled: elapsed=50000000, seconds=00.108
Timer was signaled: elapsed=50010000, seconds=05.109
Timer was signaled: elapsed=50010000, seconds=10.110
Timer was signaled: elapsed=50000000, seconds=15.110
Timer was signaled: elapsed=50010000, seconds=20.111
Timer was signaled: elapsed=50010000, seconds=25.112
Timer was signaled: elapsed=50000000, seconds=30.112
Timer was signaled: elapsed=50010000, seconds=35.113
Timer was signaled: elapsed=50010000, seconds=40.114
Timer was signaled: elapsed=50000000, seconds=45.114
Timer was signaled: elapsed=50010000, seconds=50.115
Timer was signaled: elapsed=50010000, seconds=55.116
Timer was signaled: elapsed=50000000, seconds=00.116
Timer was signaled: elapsed=50010000, seconds=05.117
Timer was signaled: elapsed=50010000, seconds=10.118
Timer was signaled: elapsed=50000000, seconds=15.118
Timer was signaled: elapsed=50010000, seconds=20.119
Timer was signaled: elapsed=50010000, seconds=25.120
Timer was signaled: elapsed=50000000, seconds=30.120
Timer was signaled: elapsed=50010000, seconds=35.121
Timer was signaled: elapsed=50010000, seconds=40.122
Timer was signaled: elapsed=50000000, seconds=45.122
Timer was signaled: elapsed=50010000, seconds=50.123
Timer was signaled: elapsed=50010000, seconds=55.124
Timer was signaled: elapsed=50000000, seconds=00.124
Timer was signaled: elapsed=50010000, seconds=05.125
Timer was signaled: elapsed=50010000, seconds=10.126
Timer was signaled: elapsed=50000000, seconds=15.126
Timer was signaled: elapsed=50010000, seconds=20.127
Timer was signaled: elapsed=50010000, seconds=25.128
Timer was signaled: elapsed=50000000, seconds=30.128
Timer was signaled: elapsed=50000000, seconds=35.128
Timer was signaled: elapsed=50000000, seconds=40.128
Timer was signaled: elapsed=50010000, seconds=45.129
Timer was signaled: elapsed=50000000, seconds=50.129
Timer was signaled: elapsed=50000000, seconds=55.129
Timer was signaled: elapsed=50000000, seconds=00.129
Timer was signaled: elapsed=50000000, seconds=05.129
Timer was signaled: elapsed=50000000, seconds=10.129
Timer was signaled: elapsed=50010000, seconds=15.130
Timer was signaled: elapsed=50000000, seconds=20.130
Timer was signaled: elapsed=50000000, seconds=25.130
Timer was signaled: elapsed=50000000, seconds=30.130
Timer was signaled: elapsed=50000000, seconds=35.130
Timer was signaled: elapsed=50010000, seconds=40.131
Timer was signaled: elapsed=50000000, seconds=45.131
Timer was signaled: elapsed=50000000, seconds=50.131
Timer was signaled: elapsed=50000000, seconds=55.131
Timer was signaled: elapsed=50000000, seconds=00.131
Timer was signaled: elapsed=50010000, seconds=05.132
Timer was signaled: elapsed=50000000, seconds=10.132
Timer was signaled: elapsed=50000000, seconds=15.132
Timer was signaled: elapsed=50000000, seconds=20.132
Timer was signaled: elapsed=50000000, seconds=25.132
Timer was signaled: elapsed=50010000, seconds=30.133
Timer was signaled: elapsed=50000000, seconds=35.133
Timer was signaled: elapsed=50000000, seconds=40.133
Timer was signaled: elapsed=50000000, seconds=45.133
Timer was signaled: elapsed=50000000, seconds=50.133
Timer was signaled: elapsed=50010000, seconds=55.134
Timer was signaled: elapsed=50000000, seconds=00.134
Timer was signaled: elapsed=50000000, seconds=05.134
Timer was signaled: elapsed=50000000, seconds=10.134
Timer was signaled: elapsed=50000000, seconds=15.134
Timer was signaled: elapsed=50000000, seconds=20.134
Timer was signaled: elapsed=50010000, seconds=25.135
Timer was signaled: elapsed=50000000, seconds=30.135
Timer was signaled: elapsed=50000000, seconds=35.135
Timer was signaled: elapsed=50000000, seconds=40.135
Timer was signaled: elapsed=50000000, seconds=45.135
Timer was signaled: elapsed=50010000, seconds=50.136
Timer was signaled: elapsed=50000000, seconds=55.136
Timer was signaled: elapsed=50000000, seconds=00.136
Timer was signaled: elapsed=50000000, seconds=05.136
Timer was signaled: elapsed=50000000, seconds=10.136
Timer was signaled: elapsed=50010000, seconds=15.137
Timer was signaled: elapsed=50000000, seconds=20.137
Timer was signaled: elapsed=50000000, seconds=25.137
Timer was signaled: elapsed=50000000, seconds=30.137
Timer was signaled: elapsed=50000000, seconds=35.137
Timer was signaled: elapsed=50010000, seconds=40.138
Timer was signaled: elapsed=50000000, seconds=45.138
Timer was signaled: elapsed=50000000, seconds=50.138
Timer was signaled: elapsed=50000000, seconds=55.138
Timer was signaled: elapsed=50000000, seconds=00.138
Timer was signaled: elapsed=50010000, seconds=05.139
Timer was signaled: elapsed=50000000, seconds=10.139
Timer was signaled: elapsed=50000000, seconds=15.139
Timer was signaled: elapsed=50000000, seconds=20.139
Timer was signaled: elapsed=50000000, seconds=25.139
Timer was signaled: elapsed=50000000, seconds=30.139
Timer was signaled: elapsed=50000000, seconds=35.139
Timer was signaled: elapsed=50000000, seconds=40.139
Timer was signaled: elapsed=50000000, seconds=45.139
Timer was signaled: elapsed=50000000, seconds=50.139
Timer was signaled: elapsed=50000000, seconds=55.139
Timer was signaled: elapsed=50010000, seconds=00.140
Timer was signaled: elapsed=50000000, seconds=05.140
Timer was signaled: elapsed=50000000, seconds=10.140
Timer was signaled: elapsed=50000000, seconds=15.140
Timer was signaled: elapsed=50000000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50000000, seconds=35.140
Timer was signaled: elapsed=50000000, seconds=40.140
Timer was signaled: elapsed=50000000, seconds=45.140
Timer was signaled: elapsed=50000000, seconds=50.140
Timer was signaled: elapsed=50000000, seconds=55.140
Timer was signaled: elapsed=50000000, seconds=00.140
Timer was signaled: elapsed=50000000, seconds=05.140
Timer was signaled: elapsed=50000000, seconds=10.140
Timer was signaled: elapsed=50000000, seconds=15.140
Timer was signaled: elapsed=50000000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50000000, seconds=35.140
Timer was signaled: elapsed=50000000, seconds=40.140
Timer was signaled: elapsed=50000000, seconds=45.140
Timer was signaled: elapsed=50000000, seconds=50.140
Timer was signaled: elapsed=50000000, seconds=55.140
Timer was signaled: elapsed=50000000, seconds=00.140
Timer was signaled: elapsed=50000000, seconds=05.140
Timer was signaled: elapsed=50000000, seconds=10.140
Timer was signaled: elapsed=50000000, seconds=15.140
Timer was signaled: elapsed=50000000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50010000, seconds=35.141
Timer was signaled: elapsed=50000000, seconds=40.141
Timer was signaled: elapsed=50000000, seconds=45.141
Timer was signaled: elapsed=50000000, seconds=50.141
Timer was signaled: elapsed=50000000, seconds=55.141
Timer was signaled: elapsed=50000000, seconds=00.141
Timer was signaled: elapsed=50000000, seconds=05.141
Timer was signaled: elapsed=50000000, seconds=10.141
Timer was signaled: elapsed=50000000, seconds=15.141
Timer was signaled: elapsed=50000000, seconds=20.141
Timer was signaled: elapsed=50000000, seconds=25.141
Timer was signaled: elapsed=50000000, seconds=30.141
Timer was signaled: elapsed=50000000, seconds=35.141
Timer was signaled: elapsed=50000000, seconds=40.141
Timer was signaled: elapsed=50000000, seconds=45.141
Timer was signaled: elapsed=50000000, seconds=50.141
Timer was signaled: elapsed=50000000, seconds=55.141
Timer was signaled: elapsed=50000000, seconds=00.141
Timer was signaled: elapsed=50000000, seconds=05.141
Timer was signaled: elapsed=50000000, seconds=10.141
Timer was signaled: elapsed=50000000, seconds=15.141
Timer was signaled: elapsed=50000000, seconds=20.141
Timer was signaled: elapsed=50000000, seconds=25.141
Timer was signaled: elapsed=50000000, seconds=30.141
Timer was signaled: elapsed=50000000, seconds=35.141
Timer was signaled: elapsed=50000000, seconds=40.141
Timer was signaled: elapsed=50000000, seconds=45.141
Timer was signaled: elapsed=50000000, seconds=50.141
Timer was signaled: elapsed=50000000, seconds=55.141
Timer was signaled: elapsed=50000000, seconds=00.141
Timer was signaled: elapsed=50000000, seconds=05.141
Timer was signaled: elapsed=50000000, seconds=10.141
Timer was signaled: elapsed=50000000, seconds=15.141
Timer was signaled: elapsed=50000000, seconds=20.141
Timer was signaled: elapsed=50000000, seconds=25.141
Timer was signaled: elapsed=50000000, seconds=30.141
Timer was signaled: elapsed=50000000, seconds=35.141
Timer was signaled: elapsed=50000000, seconds=40.141
Timer was signaled: elapsed=50000000, seconds=45.141
Timer was signaled: elapsed=50000000, seconds=50.141
Timer was signaled: elapsed=50000000, seconds=55.141
Timer was signaled: elapsed=50000000, seconds=00.141
Timer was signaled: elapsed=50000000, seconds=05.141
Timer was signaled: elapsed=50000000, seconds=10.141
Timer was signaled: elapsed=50000000, seconds=15.141
Timer was signaled: elapsed=49990000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50000000, seconds=35.140
Timer was signaled: elapsed=50000000, seconds=40.140
Timer was signaled: elapsed=50000000, seconds=45.140
Timer was signaled: elapsed=50000000, seconds=50.140
Timer was signaled: elapsed=50000000, seconds=55.140
Timer was signaled: elapsed=50000000, seconds=00.140
Timer was signaled: elapsed=50000000, seconds=05.140
Timer was signaled: elapsed=50000000, seconds=10.140
Timer was signaled: elapsed=50000000, seconds=15.140
Timer was signaled: elapsed=50000000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50000000, seconds=35.140
Timer was signaled: elapsed=50000000, seconds=40.140
Timer was signaled: elapsed=50000000, seconds=45.140
Timer was signaled: elapsed=50000000, seconds=50.140
Timer was signaled: elapsed=50000000, seconds=55.140
Timer was signaled: elapsed=50000000, seconds=00.140
Timer was signaled: elapsed=50000000, seconds=05.140
Timer was signaled: elapsed=50000000, seconds=10.140
Timer was signaled: elapsed=50000000, seconds=15.140
Timer was signaled: elapsed=50000000, seconds=20.140
Timer was signaled: elapsed=50000000, seconds=25.140
Timer was signaled: elapsed=50000000, seconds=30.140
Timer was signaled: elapsed=50000000, seconds=35.140
Timer was signaled: elapsed=50000000, seconds=40.140
Timer was signaled: elapsed=50000000, seconds=45.140
Timer was signaled: elapsed=50000000, seconds=50.140
Timer was signaled: elapsed=49990000, seconds=55.139
Timer was signaled: elapsed=50000000, seconds=00.139
Timer was signaled: elapsed=50000000, seconds=05.139
Timer was signaled: elapsed=50000000, seconds=10.139
Timer was signaled: elapsed=50000000, seconds=15.139
Timer was signaled: elapsed=50000000, seconds=20.139
Timer was signaled: elapsed=50000000, seconds=25.139
Timer was signaled: elapsed=50000000, seconds=30.139
Timer was signaled: elapsed=50000000, seconds=35.139
Timer was signaled: elapsed=50000000, seconds=40.139
Timer was signaled: elapsed=50000000, seconds=45.139
Timer was signaled: elapsed=50000000, seconds=50.139
Timer was signaled: elapsed=50000000, seconds=55.139
Timer was signaled: elapsed=50000000, seconds=00.139
Timer was signaled: elapsed=50000000, seconds=05.139
Timer was signaled: elapsed=50000000, seconds=10.139
Timer was signaled: elapsed=50000000, seconds=15.139
Timer was signaled: elapsed=50000000, seconds=20.139
Timer was signaled: elapsed=50000000, seconds=25.139
Timer was signaled: elapsed=49990000, seconds=30.138
Timer was signaled: elapsed=50000000, seconds=35.138
Timer was signaled: elapsed=50000000, seconds=40.138
Timer was signaled: elapsed=50000000, seconds=45.138
Timer was signaled: elapsed=50000000, seconds=50.138
Timer was signaled: elapsed=50000000, seconds=55.138
Timer was signaled: elapsed=50000000, seconds=00.138
Timer was signaled: elapsed=50000000, seconds=05.138
Timer was signaled: elapsed=50000000, seconds=10.138
Timer was signaled: elapsed=50000000, seconds=15.138
Timer was signaled: elapsed=50000000, seconds=20.138
Timer was signaled: elapsed=50000000, seconds=25.138
Timer was signaled: elapsed=50000000, seconds=30.138
Timer was signaled: elapsed=50000000, seconds=35.138
Timer was signaled: elapsed=50000000, seconds=40.138
Timer was signaled: elapsed=50000000, seconds=45.138
Timer was signaled: elapsed=49990000, seconds=50.137
Timer was signaled: elapsed=50000000, seconds=55.137
Timer was signaled: elapsed=50000000, seconds=00.137
Timer was signaled: elapsed=50000000, seconds=05.137
Timer was signaled: elapsed=50000000, seconds=10.137
Timer was signaled: elapsed=50000000, seconds=15.137
Timer was signaled: elapsed=50000000, seconds=20.137
Timer was signaled: elapsed=50000000, seconds=25.137
Timer was signaled: elapsed=50000000, seconds=30.137
Timer was signaled: elapsed=50000000, seconds=35.137
Timer was signaled: elapsed=50000000, seconds=40.137
Timer was signaled: elapsed=50000000, seconds=45.137
Timer was signaled: elapsed=50000000, seconds=50.137
Timer was signaled: elapsed=50000000, seconds=55.137
Timer was signaled: elapsed=50000000, seconds=00.137
Timer was signaled: elapsed=49990000, seconds=05.136
Timer was signaled: elapsed=50000000, seconds=10.136
Timer was signaled: elapsed=50000000, seconds=15.136
Timer was signaled: elapsed=50000000, seconds=20.136
Timer was signaled: elapsed=50000000, seconds=25.136
Timer was signaled: elapsed=50000000, seconds=30.136
Timer was signaled: elapsed=50000000, seconds=35.136
Timer was signaled: elapsed=50000000, seconds=40.136
Timer was signaled: elapsed=50000000, seconds=45.136
Timer was signaled: elapsed=50000000, seconds=50.136
Timer was signaled: elapsed=50000000, seconds=55.136
Timer was signaled: elapsed=50000000, seconds=00.136
Timer was signaled: elapsed=50000000, seconds=05.136
Timer was signaled: elapsed=50000000, seconds=10.136
Timer was signaled: elapsed=50000000, seconds=15.136
Timer was signaled: elapsed=50000000, seconds=20.136
Timer was signaled: elapsed=49990000, seconds=25.135
Timer was signaled: elapsed=50000000, seconds=30.135
Timer was signaled: elapsed=50000000, seconds=35.135
Timer was signaled: elapsed=50000000, seconds=40.135
Timer was signaled: elapsed=50000000, seconds=45.135
Timer was signaled: elapsed=50000000, seconds=50.135
Timer was signaled: elapsed=50000000, seconds=55.135
Timer was signaled: elapsed=50000000, seconds=00.135
Timer was signaled: elapsed=50000000, seconds=05.135
Timer was signaled: elapsed=50000000, seconds=10.135
Timer was signaled: elapsed=50000000, seconds=15.135
Timer was signaled: elapsed=50000000, seconds=20.135
Timer was signaled: elapsed=50000000, seconds=25.135
Timer was signaled: elapsed=50000000, seconds=30.135
Timer was signaled: elapsed=50000000, seconds=35.135
Timer was signaled: elapsed=50000000, seconds=40.135
Timer was signaled: elapsed=49990000, seconds=45.134
Timer was signaled: elapsed=50000000, seconds=50.134
Timer was signaled: elapsed=50000000, seconds=55.134
Timer was signaled: elapsed=50000000, seconds=00.134
Timer was signaled: elapsed=50000000, seconds=05.134
Timer was signaled: elapsed=50000000, seconds=10.134
Timer was signaled: elapsed=50000000, seconds=15.134
Timer was signaled: elapsed=50000000, seconds=20.134
Timer was signaled: elapsed=50000000, seconds=25.134
Timer was signaled: elapsed=50000000, seconds=30.134
Timer was signaled: elapsed=50000000, seconds=35.134
Timer was signaled: elapsed=50000000, seconds=40.134
Timer was signaled: elapsed=50000000, seconds=45.134
Timer was signaled: elapsed=50000000, seconds=50.134
Timer was signaled: elapsed=50000000, seconds=55.134
Timer was signaled: elapsed=49990000, seconds=00.133
Timer was signaled: elapsed=50000000, seconds=05.133
Timer was signaled: elapsed=50000000, seconds=10.133
Timer was signaled: elapsed=50000000, seconds=15.133
Timer was signaled: elapsed=50000000, seconds=20.133
Timer was signaled: elapsed=50000000, seconds=25.133
Timer was signaled: elapsed=50000000, seconds=30.133
Timer was signaled: elapsed=50000000, seconds=35.133
Timer was signaled: elapsed=50000000, seconds=40.133
Timer was signaled: elapsed=50000000, seconds=45.133
Timer was signaled: elapsed=50000000, seconds=50.133
Timer was signaled: elapsed=50000000, seconds=55.133
Timer was signaled: elapsed=50000000, seconds=00.133
Timer was signaled: elapsed=50000000, seconds=05.133
Timer was signaled: elapsed=50000000, seconds=10.133
Timer was signaled: elapsed=50000000, seconds=15.133
Timer was signaled: elapsed=49990000, seconds=20.132
Timer was signaled: elapsed=50000000, seconds=25.132
Timer was signaled: elapsed=50000000, seconds=30.132
Timer was signaled: elapsed=50000000, seconds=35.132
Timer was signaled: elapsed=50000000, seconds=40.132
Timer was signaled: elapsed=50000000, seconds=45.132
Timer was signaled: elapsed=50000000, seconds=50.132
Timer was signaled: elapsed=50000000, seconds=55.132
Timer was signaled: elapsed=50000000, seconds=00.132
Timer was signaled: elapsed=50000000, seconds=05.132
Timer was signaled: elapsed=50000000, seconds=10.132
Timer was signaled: elapsed=50000000, seconds=15.132
Timer was signaled: elapsed=50000000, seconds=20.132
Timer was signaled: elapsed=50000000, seconds=25.132
Timer was signaled: elapsed=50000000, seconds=30.132
Timer was signaled: elapsed=49990000, seconds=35.131
Timer was signaled: elapsed=50000000, seconds=40.131
Timer was signaled: elapsed=50000000, seconds=45.131
Timer was signaled: elapsed=50000000, seconds=50.131
Timer was signaled: elapsed=50000000, seconds=55.131
Timer was signaled: elapsed=50000000, seconds=00.131

总结:实际上我不知道如何理解这些结果。它看起来就像Windows正试图主动纠正计时器中的任何漂移，以便每次唤醒都在"适当"的时间发生。如果是这种情况，那么这(为您想要的间隔设置单个计时器)绝对是实现您想要的目标的最简单方法。

CreateWaitableTimer和SetWaitableTimer让你等待(WaitForSingleObject，或完成端口，或任何等待)而不是睡眠。

另外，你可以给它一个精确的绝对时间，或者一个相对时间，任何你想要的。如果你想要精确到凌晨1点后的N秒，给它一个绝对时间1AM+N秒。

另外，如果你指定的话，它甚至可以在两者之间进入休眠状态。

SetWaitableTimer函数允许您指定特定的绝对时间和周期。

Hans和Adam似乎关心的是使用一次性计时器时由于处理时间的漂移(即，如果您因计时器而唤醒，并设置新计时器为"在N秒"，实际间隔为N秒+唤醒延迟+创建新计时器的时间)。通过使用周期计时器，就不会有这个问题。或者您可以使用一次性计时器，并以绝对方式指定下一个到期时间，这也将防止漂移。

总共需要CreateWaitableTimer, SetWaitableTimer和一个等待函数，如WaitForMultipleObjectsEx。