«

Im devoloping a simulator for a driver. Every time the simulator
recieves a frame, it must answer with another. One of these frames,
forces to use a few variables during 3 seconds. How I should create a 3
seconds timer? During this time , the simulator and the driver continue
receiving and sending data of course.

Thanks for your support.

If your C++ program will run on Unix/Linux, you can use setitimer in
<sys/time.h>
It can be consulted with "man setitimer" on the command line.

Jaime ha escrito:

> If your C++ program will run on Unix/Linux, you can use setitimer in
> <sys/time.h>
> It can be consulted with "man setitimer" on the command line.

Im developing under windows, but thanks for your help.

"solarin" <> wrote in message
news: oups.com...
>
> Jaime ha escrito:
>
>> If your C++ program will run on Unix/Linux, you can use setitimer in
>> <sys/time.h>
>> It can be consulted with "man setitimer" on the command line.
>
> Im developing under windows, but thanks for your help.
>

You'll need to ask in a Windows newsgroup then. Timers are not part of the
C++ language itself, but are supplied by the operating system (and sometimes
wrapped by compiler or third-party vendors, I suppose).

-Howard

Hi,

One solution is to use mutlithreading. Lookup beginthreadex, mutexes
WaitForSingleObject etc.

Another solution. When reading from file descriptors sockets you can
use(/abuse) 'select'. The last parameter of select is a timeout value i,e.

Set the timeout to 3 seconds.
If anything is received on the descriptors check the time (you can do
precision timing with the multimedia functions of windows) So you know how
long the next wait should be
Handle the incoming messages
Do an select of the remaining 3 seconds (you can check the return value of
select to know if it returned because of timer expiry)

If return because of 3 second elapse do your '3 second thing'

Ad infinitum

--


Regards, Ron AF Greve

http://moonlit.xs4all.nl

"solarin" <> wrote in message
news: oups.com...
> Im devoloping a simulator for a driver. Every time the simulator
> recieves a frame, it must answer with another. One of these frames,
> forces to use a few variables during 3 seconds. How I should create a 3
> seconds timer? During this time , the simulator and the driver continue
> receiving and sending data of course.
>
> Thanks for your support.
>

Moonlit wrote:

> Hi,

Please don't top-post. Your replies belong following or interspersed
with properly trimmed quotes. See the majority of other posts in the
newsgroup, or the group FAQ list:
<http://www.parashift.com/c++-faq-lite/how-to-post.html>



Brian (synchronicity -- Laura Nyro's "Timer" is playing)

solarin wrote:
> Im devoloping a simulator for a driver. Every time the simulator
> recieves a frame, it must answer with another. One of these frames,
> forces to use a few variables during 3 seconds. How I should create a
> 3 seconds timer? During this time , the simulator and the driver
> continue receiving and sending data of course.

There are some timer classes in Boost:
http://www.boost.org/libs/timer/index.html
I never tried them though.

Boris