[Boost-users] Does io_service::post() block while io_service is busy?

Subject: [Boost-users] Does io_service::post() block while io_service is busy?
From: Andreas Wehrmann (a.wehrmann_at_[hidden])
Date: 2012-04-12 10:01:34

I have a question about the behaviour of asio::io_service when it comes 
to executing previously posted work while trying to post even more work.

I have two threads, one of which is the worker thread that runs 
io_service::run() and the other one that runs with a high priority and 
uses io_service::post() to relay processing of incoming requests via 
network to the worker thread (this has to be fast).

The question is:
When the worker thread is currently executing work (of which there may 
be a lot) which the high priority thread previously posted to it,
is the io_service locked?; so that calls to io_service::post() block 
until the io_service is done?

I came to this question because I saw that in ::post() there is a lock 
involved protecting access to the operations queue.

Regards,

Andreas

-- 
Dipl.-Ing. (FH) Andreas Wehrmann
Software Development
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