[alsa-devel] [PATCH] alsa-python: add register_poll to alsaseq

[Takashi Iwai]

At Wed, 12 May 2010 03:51:34 +0200,
Hector Martin wrote:
> 
> Attached patch adds register_poll to the sequencer bindings to support
> nonblocking sequencer access with the select module.
> 
> I sent this last month but it looks like it was overlooked. Resending.

Thanks, applied now.


Takashi

> 
> -- 
> Hector Martin (hector at marcansoft.com)
> Public Key: http://www.marcansoft.com/marcan.asc
> 
> 
> [2 0001-Add-register_poll-for-alsaseq.patch <text/plain (7bit)>]
> >From f801ff2f940b24c3ee3f27271ec4b249a2c67fb8 Mon Sep 17 00:00:00 2001
> From: Hector Martin <hector at marcansoft.com>
> Date: Wed, 21 Apr 2010 05:54:49 +0200
> Subject: [PATCH] Add register_poll for alsaseq
> 
> Signed-off-by: Hector Martin <hector at marcansoft.com>
> ---
>  pyalsa/alsaseq.c |   51 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 51 insertions(+), 0 deletions(-)
> 
> diff --git a/pyalsa/alsaseq.c b/pyalsa/alsaseq.c
> index de131a4..bbf6b2e 100644
> --- a/pyalsa/alsaseq.c
> +++ b/pyalsa/alsaseq.c
> @@ -3236,6 +3236,53 @@ Sequencer_stop_queue(SequencerObject *self,
>    Py_RETURN_NONE;
>  }
>  
> +PyDoc_STRVAR(Sequencer_registerpoll__doc__,
> +"register_poll(pollObj, input=False, output=False) -- Register poll file descriptors.");
> +
> +static PyObject *
> +Sequencer_registerpoll(SequencerObject *self, PyObject *args, PyObject *kwds)
> +{
> +    PyObject *pollObj, *reg, *t;
> +    struct pollfd *pfd;
> +    int i, count;
> +    int input = 0;
> +    int output = 0;
> +    int mode = POLLIN|POLLOUT;
> +
> +    static char * kwlist[] = { "pollObj", "input", "output", NULL };
> +
> +    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|ii", kwlist, &pollObj, &input, &output))
> +        return NULL;
> +
> +    if (input && !output)
> +        mode = POLLIN;
> +    else if (!input && output)
> +        mode = POLLOUT;
> +
> +    count = snd_seq_poll_descriptors_count(self->handle, mode);
> +    if (count <= 0)
> +        Py_RETURN_NONE;
> +    pfd = alloca(sizeof(struct pollfd) * count);
> +    count = snd_seq_poll_descriptors(self->handle, pfd, count, mode);
> +    if (count <= 0)
> +        Py_RETURN_NONE;
> +
> +    reg = PyObject_GetAttr(pollObj, PyString_InternFromString("register"));
> +
> +    for (i = 0; i < count; i++) {
> +        t = PyTuple_New(2);
> +        if (t) {
> +            PyTuple_SET_ITEM(t, 0, PyInt_FromLong(pfd[i].fd));
> +            PyTuple_SET_ITEM(t, 1, PyInt_FromLong(pfd[i].events));
> +            Py_XDECREF(PyObject_CallObject(reg, t));
> +            Py_DECREF(t);
> +        }
> +    }
> +
> +    Py_XDECREF(reg);
> +
> +    Py_RETURN_NONE;
> +}
>  
>  
>  
> @@ -3309,6 +3356,10 @@ static PyMethodDef Sequencer_methods[] = {
>     (PyCFunction) Sequencer_stop_queue,
>     METH_VARARGS | METH_KEYWORDS,
>     Sequencer_stop_queue__doc__},
> +  {"register_poll",
> +   (PyCFunction) Sequencer_registerpoll,
> +   METH_VARARGS | METH_KEYWORDS,
> +   Sequencer_registerpoll__doc__},
>    {NULL}
>  };
>  
> -- 
> 1.6.4.4
> 
> [3  <text/plain; us-ascii (7bit)>]
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