Re: [Boost-users] boost posix time

From: j.c. (jolix_at_[hidden])
Date: 2008-03-04 18:29:27

On Mar 4, 2008, at 2:47 PM, Aljaz wrote:

> Hello
>
> I'm developing server and client applications and I need ping-pong  
> mechanism
> to get ping time betwen them (time needed for data to arrive)..
>
> I've been thinking the best way would be to send
> Code:
> boost::posix_time::microsec_clock::universal_time()from server to  
> client,
> which would then just reply with its own universal_time() ..
>
>
> The first problem is I dont know how to store universal_time() as an
> int/long.. I know I can store it as a string but this would take  
> extra cpu
> to parse the data each time (with boost posix library)..
>
> All the data I send is serialized - maybe I could just serialize the
> Code:
> boost::posix_time::ptimeobject and send over?
>
>
> The next thing is what if server's time zone is gmt+1 and client's  
> gmt+3?
> Will that affect the the time if I do the subtraction to get the  
> ping time?
> If so, what can I do about it?

The remote client may have an incorrect clock. To get a ping time  
simply, store the time sent into an array, when a reply from this host  
comes back find it in the array and do the math.

using namespace boost::posix_time::microsec_clock;
universal_time m_time_sent;
universal_time m_time_received;
time_duration m_ping_time;

ping_time = time_received  - time_sent;

>
>
> Maybe anyone has better solution in mind?
>
> Thanks a lot for help
>
>
>
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