windows上使用底层的sleep函数

最新推荐文章于 2025-03-09 10:52:08 发布

Cosmop01itan

最新推荐文章于 2025-03-09 10:52:08 发布

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分类专栏： C语言

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本文介绍了一种在Windows环境下使用NtDll.dll中的NtDelayExecution和ZwSetTimerResolution函数来实现精确延时的方法。通过GetProcAddress获取所需函数的地址，并展示了如何设置定时分辨率及延迟执行。

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void	nt_sleep(DWORD milliseconds)
{
	static NTSTATUS(__stdcall *NtDelayExecution)(BOOL Alertable, PLARGE_INTEGER DelayInterval) = (NTSTATUS(__stdcall*)(BOOL, PLARGE_INTEGER)) GetProcAddress(GetModuleHandleA(("ntdll.dll")), ("NtDelayExecution"));
	static NTSTATUS(__stdcall *ZwSetTimerResolution)(IN ULONG RequestedResolution, IN BOOLEAN Set, OUT PULONG ActualResolution) = (NTSTATUS(__stdcall*)(ULONG, BOOLEAN, PULONG)) GetProcAddress(GetModuleHandleA(("ntdll.dll")), ("ZwSetTimerResolution"));
	static bool once = true;
	printf("ZwSetTimerResolution %p\n",ZwSetTimerResolution);
    if (once && ZwSetTimerResolution!=NULL) {
        ULONG actualResolution;
        ZwSetTimerResolution(1, true, &actualResolution);
        once = false;
    }
	LARGE_INTEGER interval;
    interval.QuadPart = -1 * (int)(milliseconds * 10000);
	printf("NtDelayExecution %p\n",NtDelayExecution);
	if(NtDelayExecution!=NULL)
	{
		NtDelayExecution(false, &interval);
	}
    
}