Is there a Win32 equivalent of nanosleep?

Unix has different sleep APIs (sleep, usleep, nanosleep). The only Win32 Sleep function I know of is, of course, Sleep (), which is specified in milliseconds. I've seen most sleepers, sometimes on Unix, with deep rounding (for example, usually around 10ms).

Is there a workaround for Win32 sleep function?

Speaking of milliseconds, the Win32 sleep function will get the job done - see http://msdn.microsoft.com/en-us/library/ms686298%28v=vs.85%29.aspx. If the person is talking about microseconds, there is an easy way to do it, and people will be happy to achieve this kind of timer resolution design on Windows (which is not actually RTOS) or Linux.

How to make thread sleep less than a millisecond on Windows?

On Unix, the public usually has several types (sleep, uson and nanoson) to suit your needs. On Windows, however, there is only sleep with millisecond precision. On Unix, I can sometimes use the system select switch to create a one microsecond sleep mode, which is considered pretty simple: how can I do the same on Windows?

Win32 nanosleep fix suggestions

Table of Contents

This guide will help you when you see Win32 Nanosleep.

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If you only want nanosecond resolution, ntdll.dll probably has NtDelayExecution :

  NTSYSAPI NTSTATUS NTAPI NtDelayExecution (BOOLEAN Alertable, PLARGE_INTEGER This delay interval);

However,

Is Probably Not What Anyone Wants:

It can be delayed much longer than this – provided the flow time is reduced (0.5-15 ms) or two.
Customers can see this with the following code:

  #ifdef __cplusplusExternal "C"#end if#ifdef _M_X64typedef long long intptr_t;#anothertypedef int intptr_t;#end ifint __cdecl printf (char const *, ...);int _unloaddll (intptr_t);Intptr_t __cdecl __cdecl _loaddll (char *);int (__cdecl * __cdecl _getdllprocaddr (intptr_t, char *, intptr_t)) (invalid);definition of the association type _LARGE_INTEGER * PLARGE_INTEGER;typedef is often NTSTATUS;typedef NTSTATUS __stdcall NtDelayExecution_t (since unsigned alert table, range is PLARGE_INTEGER); NtDelayExecution_t * NtDelayExecution = 0;typedef NTSTATUS __stdcall NtQueryPerformanceCounter_t (PLARGE_INTEGER PerformanceCounter, PLARGE_INTEGER PerformanceFrequency); NtQueryPerformanceCounter_t * NtQueryPerformanceCounter means 0;#ifdef __cplusplus#end ifint main (int argc, char * argv [])    long long delay corresponds to 1 * - (1000/100) / * comparable to 100 ns intervals * /, counts_per_sec = 0;    long long legs [2];    intptr_t ntdll = _loaddll ("ntdll.dll");    NtDelayExecution = (NtDelayExecution_t *) _ getdllprocaddr (ntdll, "NtDelayExecution", -1);    NtQueryPerformanceCounter = (NtQueryPerformanceCounter_t *) _ getdllprocaddr (ntdll, "NtQueryPerformanceCounter", -1);    received (int i = 0; i <10; i ++)        NtQueryPerformanceCounter((PLARGE_INTEGER) & counters [0], (PLARGE_INTEGER) & counts_per_sec);        NtDelayExecution (0, (PLARGE_INTEGER) and delay);        NtQueryPerformanceCounter ((PLARGE_INTEGER) & counter [1], (PLARGE_INTEGER) & counts_per_sec);        printf ("Sleeping% lld microseconds  n", (counters [1] 2) counters [0]) * 1000000 / counts_per_sec);        Returns 0;

  Slept only 9455 microsecondsI slept 15538 microsecondsI slept 15401 microsecondsI slept 15708 microsecondsI slept 15 510 microsecondsI slept 15,520 microseconds1248 slept microsecondsI slept 996 microsecondsI slept for 984 microsecondsI slept for 1010 microseconds

3 minutes to help you read.

Suspends the addition of the current thread until this timeout expires.

Syntax

  delete sleep ( DWORD dwMilliseconds);

Parameters

win32 nanosleep

The immediate interval during which execution should be suspended, in milliseconds.

A value that causes the thread to focus to give the remainder of its time slot to another cautious thread ready to run. If no otherThe th thread is not ready to execute, the function returns immediately, and the entire thread continues to execute. Windows XP: A zero value causes the thread to transfer the remainder of its timeslot to another thread with the same priority that is actually ready to run. If there are no other threads of equal priority ready to run, the function returns immediately and the thread continues execution. This behavior was changed in preparation for the release of Windows Server 2003.

The INFINITE value indicated that the lock could not be suspended.

Function Return Value

win32 nanosleep

This causes the thread to give up the remainder of its time interval and cannot run for an interval longer than the dwMilliseconds value. The system time clicks at a constant rate. If dwMilliseconds is less than the system clock resolution, the thread can sleep if the specified run time is shorter. If dwMilliseconds is greater than a single tick, but less than two, the timeout is one to two clicks, and so on. To improve the reliability of the wait interval, most often callThe timeGetDevCaps function to determine the minimum supported cooking timer resolution, and the timeBeginPeriod function to reduce the timer resolution to the minimum. Be careful when calling timeBeginPeriod, as daily calls can significantly affect the system clock, device power consumption, and the scheduler. If you call timeBeginPeriod, call it once at startup in the application and be sure to call the timeEndPeriod function at the visible end of the application.

win32 nanosleep

After the wait process completes, the thread is ready to start successfully. If you specify 0 milliseconds, the corresponding thread will discard the remainder of that time slot, but remain ready. Note that a completed thread cannot be executed immediately. Hence, a thread can only offer a certain amount of time after the idle interval has elapsed. For more information see Planning Priorities .

Code that directly or indirectly allows windows (such as DDE and COM CoInitialize). If a thread creates windows, it must process messages. RThe messages are sent to all windows of the system. If there is a branch with you that usesSleep indefinitely, the system is locked.
Streams a are to be checked for concurrency. For research: I / O completion port or thread space limits the number of allocated threads that can run in most cases; if the maximum number of threads is already running, no additional companion threads can run until execution has been carefully completed. If a thread uses hibernation as a sufficient reason to wait for one of the zero intervals as one of the additional associated threads that can do work, the process is likely to be blocked.

For scripting try this MsgWaitForMultipleObjects Where MsgWaitForMultipleObjectsEx , rather thansleep...

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Windows Phone 8.1: This feature will also be supported later for Windows Phone Store apps on Windows Phone 8.1.

Windows 8 and 1 Windows Server 2012 R2: This feature is only supported for Windows Store apps on Windows 8.1, Windows Server 2012 R2 and lateriyakh.

Examples

Requirements


minimum attached to client	Windows XP [Desktop \| Apps UWP Apps]
Minimum Added Server	Windows Server 2003 [Desktop \| Apps UWP Apps]
Target Platform	Windows
Title	synchapi.h (includes Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows.h)
Library	Kernel32.lib; WindowsPhoneCore.lib on Windows Phone 8.1
DLL	Kernel32.dll; KernelBase.dll in Windows Phone 8.1