Re: [Boost-users] [chrono][thread] Best way to wait?

Subject: Re: [Boost-users] [chrono][thread] Best way to wait?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-03-29 11:37:43

AMDG

On 03/29/2013 08:23 AM, Klaim - Joël Lamotte wrote:
> Hi,
> can someone clarify:
> 1. what is the difference between:
> 
>     const auto wait_time = boost::chrono::miliseconds( 8 );
>     boost::mutex mutex;
>     boost::unique_lock<boost::mutex> lock( mutex );
>     boost::condition_variable wait_condition;
>     wait_condition.wait_for( lock, wait_time );
> 
> and
> 
>     const auto wait_time = boost::chrono::miliseconds( 8 );
>     boost::this_thread::sleep_for( wait_time );
> 

A thread waiting on a condition variable (a) can
be explicitly notified and (b) may wake up before
the time has expired (spurious wakeups).  If you
just want to sleep for a fixed amount of time, then
sleep_for is the right tool.

> 2. are there other ways to wait? (I mean make the thread sleep, not looping
> until it's time)
> 

In Christ,
Steven Watanabe