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Should I exchange usleep by sleep_for

Tags:

c++

c++11

I am in the stage of upgrading some legacy C++ code to C++11 under Linux using gcc. When trying to set priorities I came up with the following question. Could there be any advantage in exchanging a call to usleep with a call to std::this_thread::sleep_for? In the code I am talking about the running thread is supposed to wait for a very short period. Therefore I don't need any advanced features like interrupting the sleep.

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Claas Bontus Avatar asked Oct 01 '15 12:10

Claas Bontus

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1 Answers

Yes. std::this_thread::sleep_for is specified by the C++11 standard, and is therefore a portable solution on any system with a C++11 compiler and standard library.

usleep is specified by POSIX.1-2001 (and declared obsolete!), which means it can only be (reliably) used on POSIX compliant systems.

POSIX.1-2008 removes the specification of usleep, in favour of nanosleep. For this reason alone, std::this_thread::sleep_for is a much better choice.

(See http://linux.die.net/man/3/usleep for details).

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Andrew Avatar answered Oct 05 '22 17:10

Andrew
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