Calling ev_async_send() from multiple threads.

[Marc Lehmann]

On Mon, Jun 25, 2012 at 12:52:35AM +0200, Marek Denis <marek at octogan.net> wrote:
> different threads is a safe technique. However I am not really sure, 
> whrther those calls will trigger callback functions the exact number of 

They don't. It works like any other watcher, such as timers or I/O
watchers, it's only invoked as soon as possible.

> however I would like to be able to make a callback like:

The extra emptyness test of your queue ought to be way cheaper than the
atomic counter libev would have to implement.

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