Is there a C++ equivalent of WaitforSingleObject?

Question

I need to rewrite some code that uses the windows WaitforSingleObject function.

myEvent = CreateEvent( NULL, FALSE, FALSE, szName );
WaitForSingleObject( myEvent, nMilliseconds );

I need to wait for an event or for a timeout to happen. Is there an equivalent to this in straight C++??

I am using STL C++11 and not any other libraries such as boost.

Please clarify the question. Depends on what library you use. stl? boost? The C++ language has no integrated OS features, if that is what you are asking. — StarShine, Sep 26 '14 at 09:51
@AntonSavin I have looked at your example and ran it but I cant see how I can wait for the mutex OR a timeout at the same time — Harry Boy, Sep 26 '14 at 09:57
@HarryBoy http://en.cppreference.com/w/cpp/thread/condition_variable/wait_until — Marco A., Sep 26 '14 at 09:58
@HarryBoy Given the name `nMilliseconds` in the sample code, you probably want [`wait_for`](http://en.cppreference.com/w/cpp/thread/condition_variable/wait_for) instead of `wait_until`. — Casey, Sep 26 '14 at 13:30
Here is the exactly solution you are looking for: https://github.com/moya-lang/Event/blob/master/Event.h The code is C++11 and fully mimics WINAPI Event Objects — no one special, Mar 09 '19 at 12:05

score 6 · Answer 1 · answered Sep 26 '14 at 09:57

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You can't use C++11 thread routines with win32 threads (unless you heavily mess up with mingw thread implementations, something I would not recommend) and there's no standard C++ equivalent to an OS-specific API call.

You can, however use C++11 threads and use condition variables (cfr. waiting) to accomplish the same thing that WaitForSingleObject does, i.e.

Wait for an object to be in a signaled state
Wait until a timeout elapses

Edit: specifically you would need wait_until

answered Sep 26 '14 at 09:57

Marco A.

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The equivalent of the API call would be `wait_for`, not `wait_until`. – D Drmmr Sep 26 '14 at 11:15
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Can Visual Studio's `` be safely mixed with winapi threads? – Siyuan Ren Sep 26 '14 at 11:16
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"mess up with mingw thread" - this is not just a mingw thing. VS also implements the `` library and equally, mixing Win32 and C++ threads can cause adverse issues - they are not automatically compatible. IIRC, VS uses the ConcRT to implement the C++ threading components. – Niall Sep 26 '14 at 11:21
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Some mingw builds do use windows thread model, can't remember which ones but it might be pretty common anyway – Marco A. Sep 26 '14 at 11:22

no one special · Answer 2 · 2019-03-12T08:50:43.330

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Yes, you can use C++11 Only. Here is an example (too long to be pasted here): https://github.com/moya-lang/Event/blob/master/Event.h. The code fully mimics WINAPI Event Objects so this is something you are asking for.

edited Mar 12 '19 at 08:50

answered Mar 09 '19 at 12:06

no one special

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Is there a C++ equivalent of WaitforSingleObject?

2 Answers2