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Re^6: AnyEvent: How to protect critical sections?

by saintmike (Vicar)
on May 17, 2011 at 21:25 UTC ( #905370=note: print w/ replies, xml ) Need Help??


in reply to Re^5: AnyEvent: How to protect critical sections?
in thread AnyEvent: How to protect critical sections?

This cannot work - if you expect ->lock() to block until the semaphore is released, how can it continue to execute the remaining code elsewhere?
The same way that $condvar->recv() blocks and lets code run elsewhere.

Only problem: $condvar->recv() cannot be called from within a callback, according to the AnyEvent docs:

"Note that doing a blocking wait in a callback is not supported by any event loop, that is, recursive invocation of a blocking "->recv" is not allowed,".


Comment on Re^6: AnyEvent: How to protect critical sections?
Re^7: AnyEvent: How to protect critical sections?
by Anonymous Monk on May 18, 2011 at 19:55 UTC
    Indeed, if you would need to do that, you need to use real threads (e.g. Coro) - the limitation of condvars is partially lifted under Coro.

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