Re: [Boost-users] [Timer] Using progress timers.

Subject: Re: [Boost-users] [Timer] Using progress timers.
From: Lars Viklund (zao_at_[hidden])
Date: 2011-09-21 10:38:27

On Wed, Sep 21, 2011 at 04:27:40PM +0200, Sebastian Pfützner wrote:
> On 21.09.2011 14:05, Lars Viklund wrote:
>> The man page for clock(3) on my system claims:
>> * The clock() function returns an approximation of processor time used
>> * by the program.
>>
>> That doesn't seem to refer to wall time
>
> Is this correct according to the C++ standard? I always interpreted the  
> differences between clock()-calls as wall time in conjunction with  
> CLOCKS_PER_SEC. This constant wouldn't make sense otherwise... (?)

CLOCKS_PER_SEC is just a conversion factor between ticks and seconds of
processor time.

C99 7.23.2.1/2 says:
The clock function determines the processor time used.

-- 
Lars Viklund | zao_at_[hidden]