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Old 11-29-2010, 09:18 AM   #1
chatunman
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Registered: Nov 2010
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How can I put a process to sleep, and Wake it when something is written to its FIFO?


Hello everyone:

First post asking for help here. I will try to be as descriptive as I can.

I am working on a system with many processes that communicate to each other through FIFOs transferring data. Among them, there is a DBManager process that gets all the input coming from the other processes.

I need to make the system more responsive, by working on that DBManager.

This DBManager process is getting all the input information by regularly polling the FIFOs. The problem, is that I cannot just reduce the polling time to increase the responsiveness since it's running on an embedded system, and I would be wasting too much CPU time.

Is there a way that I could put that process to sleep, and somehow awake it when something is put on the FIFO without having to switch to a RTLinux kernel? I have been trying to find information about that all over the internet, and on these forums, but I can't seem to be able to find a mechanism that would help me in that.

Thanks in advance for all of your help.

Regards,

Chatunman.
 
Old 11-29-2010, 10:19 AM   #2
wje_lq
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In the name of the Flying Spaghetti Monster,

Have you tried select()?
Code:
man 2 select
 
Old 11-30-2010, 02:38 AM   #3
chatunman
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Thanks a million! It seems it can work! I will try to implement that, and I'll post back if it fits my needs.
 
  


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