Async – async handle

class uv.Async(loop=None, callback=None)

Async handles will wake-up the event loop from an other thread and run the given callback within the event loop’s thread. They are the only thread-safe handles.

Raises:

uv.UVError – error during the initialization of the handle

Parameters:

• loop (uv.Loop) – event loop which should be used for the handle
• callback ((uv.Async) -> None) – callback which should be called from within the event loop

callback

Callback which should be called from within the event loop.

callback(Async-Handle)

Readonly:False Type:(uv.Async) -> None

send(callback=None)

Wake-up the event loop and execute the callback afterwards. Multiple calls to this method are coalesced if they happen before the callback has been called. This means not every call will yield a execution of the callback.

Raises:

• uv.UVError – error while trying to wake-up event loop
• uv.HandleClosedError – handle has already been closed or is closing

Parameters:

callback ((uv.Async) -> None) – callback which should be called from within the event loop