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

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@marcansoft.com) Public Key: http://www.marcansoft.com/marcan.asc

[2 0001-Add-register_poll-for-alsaseq.patch <text/plain (7bit)>]

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From f801ff2f940b24c3ee3f27271ec4b249a2c67fb8 Mon Sep 17 00:00:00 2001

From: Hector Martin hector@marcansoft.com Date: Wed, 21 Apr 2010 05:54:49 +0200 Subject: [PATCH] Add register_poll for alsaseq

Signed-off-by: Hector Martin hector@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

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