On 08/25/2015 07:27 PM, William Hermans wrote:
> /Then you're not getting to the printf...../
>
> /Ok, one possibility is that the system calls are taking lots of time./
> /Another possibility is that the wait time is giving you a problem./
>
> /If you understand the mechanism of a semaphore, then you can implement/
> /your own in code./
>
> /Not sure what's going on./
>
>
> Yeah, thats why I put the printf() there to begin with. A quick way to test
> where my code was "hanging". However, I did do some further testing, and
> found the stalling was actually std out flushing once every 5-10 seconds or
> so ( printf() no "\n" ) at least one the IPC server side.
When I use stdio like that, I disable stdio buffering with
setbuf(stdout, NULL);
Optionally, fprintf(stderr, ...); is unbuffered as well.
Regards,
Peter Hurley
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