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asyncio doc: add an example to schedule a coroutine from a different thread

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Victor Stinner 2014-02-04 18:18:27 +01:00
parent d8b24d756a
commit 5cb84ed5b1
1 changed files with 8 additions and 5 deletions
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Doc/library/asyncio-dev.rst
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@ -13,12 +13,15 @@ Concurrency and multithreading
------------------------------ ------------------------------
An event loop runs in a thread and executes all callbacks and tasks in the same An event loop runs in a thread and executes all callbacks and tasks in the same
thread. If a callback should be scheduled from a different thread, the thread. While a task in running in the event loop, no other task is running in
:meth:`BaseEventLoop.call_soon_threadsafe` method should be used. the same thread. But when the task uses ``yield from``, the task is suspended
and the event loop executes the next task.
While a task in running in the event loop, no other task is running in the same To schedule a callback from a different thread, the
thread. But when the task uses ``yield from``, the task is suspended and the :meth:`BaseEventLoop.call_soon_threadsafe` method should be used. Example to
event loop executes the next task. schedule a coroutine from a different::
loop.call_soon_threadsafe(asyncio.async, coro_func())
To handle signals and to execute subprocesses, the event loop must be run in To handle signals and to execute subprocesses, the event loop must be run in
the main thread. the main thread.