send event from extension?

[Markus von Ehr]

Roger Upole schrieb:

> You could use win32event.CreateEvent and pass the handle into your
> extension,
> call SetEvent in the c code, and use win32event.WaitForSingleObject to wait
> for
> the signal.  Alternately, you could create a named event and call OpenEvent
> to
> get a handle instead of passing it around.
>     hth
>        Roger
> 
> "Markus von Ehr" <vonehr at ipm.fhg.de> wrote in message
> news:c957po$qrd$1 at news2.rz.uni-karlsruhe.de...
> 
>>Hi everybody,
>>
>>I'd like to create an event which I have to post/set
>>within an extension (new frame signal from a camera).
>>In python I would like to react on this event.
>>How could I create and post the event in c and
>>how could I receive it in a python event handler
>>routine done with the win32event module?
>>
>>Thanks for any answer,
>>
>>Markus

Hi Roger,

I don't know how to pass the handle. Is only the event.handle
important? And how to wait for the event?
Do I have to verify that the correct event fired my
WaitForSingleObject?
Can you help me?
I do the following in my python code:

import win32event
.
.
.
evt = win32event.CreateEvent(None, 0, 0, None)

# pass event to c-extension
cam_ext.SetEvent(evt.handle)


# and wait for the event
win32event.WaitForSingleObject(evt)


###########################################

// c-extension

int event;

PyObject *cam_ext_SetEvent(PyObject *pSelf, PyObject *pArgs)
{

     if (!PyArg_ParseTuple(pArgs, "i", &event))
		return NULL;

	Py_INCREF(Py_None);
	return Py_None;
}


// Set the event

::SetEvent(event);

Do you think it's correct? generally SetEvent needs an event object and
not only a number?

Thanks for hints,

Markus