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alsa-plugins/0009-pulse-unify-stream-context-state-checks.patch

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Add a couple of more clean up patches for the pulse plugin
2009-08-04 22:15:24 +00:00
From 59ccd2aca941b4653803f5415b4985ab35de0c35 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <mznyfn@0pointer.de>
Date: Tue, 4 Aug 2009 23:55:05 +0200
Subject: [PATCH 09/11] pulse: unify stream/context state checks
Unify (and simplify) the paths that check for the validity of a
stream/context: always call into check_stream()/pulse_check_connection()
when applicable instead of rolling our own checks each time. Also check
for validity of mainloop before locking it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
pulse/ctl_pulse.c | 72 ++++++++++++++++++++++++++++++++----------
pulse/pcm_pulse.c | 90 +++++++++++++++++++++++-----------------------------
2 files changed, 95 insertions(+), 67 deletions(-)
diff --git a/pulse/ctl_pulse.c b/pulse/ctl_pulse.c
index 2caa29b..879f260 100644
--- a/pulse/ctl_pulse.c
+++ b/pulse/ctl_pulse.c
@@ -150,9 +150,13 @@ static int pulse_update_volume(snd_ctl_pulse_t * ctl)
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p)
return -EBADFD;
+ err = pulse_check_connection(ctl->p);
+ if (err < 0)
+ return err;
+
o = pa_context_get_sink_info_by_name(ctl->p->context, ctl->sink,
sink_info_cb, ctl);
if (o) {
@@ -182,17 +186,27 @@ static int pulse_update_volume(snd_ctl_pulse_t * ctl)
static int pulse_elem_count(snd_ctl_ext_t * ext)
{
snd_ctl_pulse_t *ctl = ext->private_data;
- int count = 0;
+ int count = 0, err;
assert(ctl);
+ if (!ctl->p || !ctl->p->mainloop)
+ return -EBADFD;
+
pa_threaded_mainloop_lock(ctl->p->mainloop);
+ err = pulse_check_connection(ctl->p);
+ if (err < 0) {
+ count = err;
+ goto finish;
+ }
+
if (ctl->source)
count += 2;
if (ctl->sink)
count += 2;
+finish:
pa_threaded_mainloop_unlock(ctl->p->mainloop);
return count;
@@ -202,16 +216,21 @@ static int pulse_elem_list(snd_ctl_ext_t * ext, unsigned int offset,
snd_ctl_elem_id_t * id)
{
snd_ctl_pulse_t *ctl = ext->private_data;
+ int err;
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
pa_threaded_mainloop_lock(ctl->p->mainloop);
+ err = pulse_check_connection(ctl->p);
+ if (err < 0)
+ goto finish;
+
if (ctl->source) {
if (offset == 0)
snd_ctl_elem_id_set_name(id, SOURCE_VOL_NAME);
@@ -220,14 +239,19 @@ static int pulse_elem_list(snd_ctl_ext_t * ext, unsigned int offset,
} else
offset += 2;
+ err = 0;
+
+finish:
pa_threaded_mainloop_unlock(ctl->p->mainloop);
- if (offset == 2)
- snd_ctl_elem_id_set_name(id, SINK_VOL_NAME);
- else if (offset == 3)
- snd_ctl_elem_id_set_name(id, SINK_MUTE_NAME);
+ if (err >= 0) {
+ if (offset == 2)
+ snd_ctl_elem_id_set_name(id, SINK_VOL_NAME);
+ else if (offset == 3)
+ snd_ctl_elem_id_set_name(id, SINK_MUTE_NAME);
+ }
- return 0;
+ return err;
}
static snd_ctl_ext_key_t pulse_find_elem(snd_ctl_ext_t * ext,
@@ -266,7 +290,7 @@ static int pulse_get_attribute(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(ctl->p->mainloop);
@@ -319,7 +343,7 @@ static int pulse_read_integer(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(ctl->p->mainloop);
@@ -371,7 +395,7 @@ static int pulse_write_integer(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(ctl->p->mainloop);
@@ -476,7 +500,7 @@ static void pulse_subscribe_events(snd_ctl_ext_t * ext, int subscribe)
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return;
pa_threaded_mainloop_lock(ctl->p->mainloop);
@@ -491,17 +515,23 @@ static int pulse_read_event(snd_ctl_ext_t * ext, snd_ctl_elem_id_t * id,
{
snd_ctl_pulse_t *ctl = ext->private_data;
int offset;
- int err = -EAGAIN;
+ int err;
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(ctl->p->mainloop);
- if (!ctl->updated || !ctl->subscribed)
+ err = pulse_check_connection(ctl->p);
+ if (err < 0)
+ goto finish;
+
+ if (!ctl->updated || !ctl->subscribed) {
+ err = -EAGAIN;
goto finish;
+ }
if (ctl->source)
offset = 2;
@@ -540,20 +570,28 @@ static int pulse_ctl_poll_revents(snd_ctl_ext_t * ext, struct pollfd *pfd,
unsigned short *revents)
{
snd_ctl_pulse_t *ctl = ext->private_data;
- int err = 0;
+ int err;
assert(ctl);
- if (!ctl->p || !ctl->p->mainloop || !ctl->p->context)
+ if (!ctl->p || !ctl->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(ctl->p->mainloop);
+ err = pulse_check_connection(ctl->p);
+ if (err < 0)
+ goto finish;
+
if (ctl->updated)
*revents = POLLIN;
else
*revents = 0;
+ err = 0;
+
+finish:
+
pa_threaded_mainloop_unlock(ctl->p->mainloop);
return err;
diff --git a/pulse/pcm_pulse.c b/pulse/pcm_pulse.c
index a625f55..98983f8 100644
--- a/pulse/pcm_pulse.c
+++ b/pulse/pcm_pulse.c
@@ -135,11 +135,15 @@ static int update_active(snd_pcm_pulse_t *pcm) {
if (!pcm->p)
return -EBADFD;
- ret = check_active(pcm);
+ ret = check_stream(pcm);
if (ret < 0)
- return ret;
+ goto finish;
+
+ ret = check_active(pcm);
- if (ret > 0)
+finish:
+
+ if (ret != 0) /* On error signal the caller, too */
pulse_poll_activate(pcm->p);
else
pulse_poll_deactivate(pcm->p);
@@ -199,12 +203,12 @@ static int pulse_start(snd_pcm_ioplug_t * io)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- err = pulse_check_connection(pcm->p);
+ err = check_stream(pcm);
if (err < 0)
goto finish;
@@ -244,12 +248,12 @@ static int pulse_stop(snd_pcm_ioplug_t * io)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- err = pulse_check_connection(pcm->p);
+ err = check_stream(pcm);
if (err < 0)
goto finish;
@@ -291,12 +295,12 @@ static int pulse_drain(snd_pcm_ioplug_t * io)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- err = pulse_check_connection(pcm->p);
+ err = check_stream(pcm);
if (err < 0)
goto finish;
@@ -328,7 +332,7 @@ static snd_pcm_sframes_t pulse_pointer(snd_pcm_ioplug_t * io)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
if (io->state == SND_PCM_STATE_XRUN)
@@ -339,12 +343,7 @@ static snd_pcm_sframes_t pulse_pointer(snd_pcm_ioplug_t * io)
pa_threaded_mainloop_lock(pcm->p->mainloop);
- if (!pcm->stream) {
- ret = -EBADFD;
- goto finish;
- }
-
- ret = pulse_check_connection(pcm->p);
+ ret = check_stream(pcm);
if (ret < 0)
goto finish;
@@ -379,18 +378,13 @@ static int pulse_delay(snd_pcm_ioplug_t * io, snd_pcm_sframes_t * delayp)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- if (!pcm->stream) {
- err = -EBADFD;
- goto finish;
- }
-
for (;;) {
- err = pulse_check_connection(pcm->p);
+ err = check_stream(pcm);
if (err < 0)
goto finish;
@@ -433,17 +427,12 @@ static snd_pcm_sframes_t pulse_write(snd_pcm_ioplug_t * io,
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- if (!pcm->stream) {
- ret = -EBADFD;
- goto finish;
- }
-
- ret = pulse_check_connection(pcm->p);
+ ret = check_stream(pcm);
if (ret < 0)
goto finish;
@@ -493,17 +482,12 @@ static snd_pcm_sframes_t pulse_read(snd_pcm_ioplug_t * io,
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- if (!pcm->stream) {
- ret = -EBADFD;
- goto finish;
- }
-
- ret = pulse_check_connection(pcm->p);
+ ret = check_stream(pcm);
if (ret < 0)
goto finish;
@@ -624,13 +608,16 @@ static int pulse_pcm_poll_revents(snd_pcm_ioplug_t * io,
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- err = check_active(pcm);
+ err = check_stream(pcm);
+ if (err < 0)
+ goto finish;
+ err = check_active(pcm);
if (err < 0)
goto finish;
@@ -655,7 +642,7 @@ static int pulse_prepare(snd_pcm_ioplug_t * io)
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
@@ -757,7 +744,7 @@ static int pulse_hw_params(snd_pcm_ioplug_t * io,
assert(pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
@@ -856,23 +843,26 @@ static int pulse_pause(snd_pcm_ioplug_t * io, int enable)
{
snd_pcm_pulse_t *pcm = io->private_data;
int err = 0;
+ pa_operation *o;
assert (pcm);
- if (!pcm->p)
+ if (!pcm->p || !pcm->p->mainloop)
return -EBADFD;
pa_threaded_mainloop_lock(pcm->p->mainloop);
- if (pcm->stream) {
- pa_operation *o;
- o = pa_stream_cork(pcm->stream, enable, NULL, NULL);
- if (o)
- pa_operation_unref(o);
- else
- err = -EIO;
- }
+ err = check_stream(pcm);
+ if (err < 0)
+ goto finish;
+
+ o = pa_stream_cork(pcm->stream, enable, NULL, NULL);
+ if (o)
+ pa_operation_unref(o);
+ else
+ err = -EIO;
+finish:
pa_threaded_mainloop_unlock(pcm->p->mainloop);
return err;
--
1.6.4
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