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alsa-lib/src/pcm
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Joshua Frkuska 2dd78251ff pcm: direct: Protect from freeing semaphore when already in use 
In the case of dshare, dsnoop, and dmix when a device is opened twice
and fails the second time, the semaphore is completely discarded. This
creates dangling semaphore data.

This patch removes the possibility for the semaphore to be destroyed during
a typical open failure by first checking if the shared memory can be destroyed
or not. If the shared memory cannot be released it means both it and the
semaphore are still in use and therefore the semaphore is just released.

Signed-off-by: Joshua Frkuska <joshua_frkuska@mentor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-11-28 20:13:36 +01:00
..
scopes Change .so module name and installation patch (/usr/lib/alsa-lib/scopes) 2005-06-07 11:31:18 +00:00
interval.c Removed more asserts 2003-05-28 18:49:15 +00:00
interval.h Make local functions really local 2007-11-30 18:26:13 +01:00
interval_inline.h Added snd_interval_set_min_max()... 2003-02-17 10:21:24 +00:00
ladspa.h big ALSA LADSPA plugin rewrite for multiple channel LADSPA plugins 2005-12-13 14:08:58 +00:00
Makefile.am pcm: Remove home brew atomic operations 2016-07-11 15:25:30 +02:00
mask.c Updated GNU GPL license (address). 2001-12-30 09:22:54 +00:00
mask.h Enhanced bitmasks in PCM - added support for more formats by Takashi and me 2002-06-26 02:04:11 +00:00
mask_inline.h Removed more asserts 2003-05-28 18:49:15 +00:00
pcm.c pcm: Better understandable locking code 2016-09-02 10:13:48 +02:00
pcm_adpcm.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_alaw.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_asym.c Set PCM name properly in empty and asym plugins 2007-11-26 12:29:37 +01:00
pcm_copy.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_direct.c pcm: Fix shm initialization race-condition 2016-08-22 18:10:40 +02:00
pcm_direct.h pcm: dmix: Handle slave PCM xrun and unexpected states properly 2015-11-05 14:37:10 +01:00
pcm_dmix.c pcm: direct: Protect from freeing semaphore when already in use 2016-11-28 20:13:36 +01:00
pcm_dmix_generic.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_dmix_i386.c pcm_dmix: add support for S24_LE format 2010-03-02 14:01:32 +01:00
pcm_dmix_i386.h pcm dmix plugin: fix MIX_AREAS_24 routine for i386 & x86_64 platforms 2009-06-16 20:10:19 +02:00
pcm_dmix_x86_64.c Add missing remix_areas_* for x86-64 2008-01-14 17:24:14 +01:00
pcm_dmix_x86_64.h pcm dmix plugin: fix MIX_AREAS_24 routine for i386 & x86_64 platforms 2009-06-16 20:10:19 +02:00
pcm_dshare.c pcm: direct: Protect from freeing semaphore when already in use 2016-11-28 20:13:36 +01:00
pcm_dsnoop.c pcm: direct: Protect from freeing semaphore when already in use 2016-11-28 20:13:36 +01:00
pcm_empty.c Set PCM name properly in empty and asym plugins 2007-11-26 12:29:37 +01:00
pcm_ext_parm.h Make local functions really local 2007-11-30 18:26:13 +01:00
pcm_extplug.c pcm: ioplug,extplug: Fix logic errors in type checks 2015-09-08 20:57:47 +02:00
pcm_file.c pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
pcm_generic.c pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
pcm_generic.h PCM: Avoid busy loop in snd_pcm_write_areas() with rate plugin 2012-11-13 16:16:26 +01:00
pcm_hooks.c pcm: remove alloca() from _snd_pcm_hook_ctl_elems_install() 2016-07-14 16:33:48 +02:00
pcm_hw.c pcm: Better understandable locking code 2016-09-02 10:13:48 +02:00
pcm_iec958.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_ioplug.c pcm: fix return value of snd_pcm_ioplug_sw_params() 2016-07-13 16:37:01 +02:00
pcm_ladspa.c pcm: ladspa: Fix segfault due to a wrong channel reference 2015-10-02 11:55:36 +02:00
pcm_lfloat.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_linear.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_local.h pcm: Better understandable locking code 2016-09-02 10:13:48 +02:00
pcm_meter.c pcm: Remove superfluous rmb() from PCM meter plugin 2016-07-07 16:30:54 +02:00
pcm_misc.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_mmap.c pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
pcm_mmap_emul.c pcm: Implement timestamp type handling in all plugins 2014-07-14 18:12:34 +02:00
pcm_mulaw.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_multi.c coverity fixes 2016-01-12 16:26:58 +01:00
pcm_null.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_params.c pcm: Don't assert in _snd_pcm_hw_params_internal() 2015-06-01 13:46:40 +02:00
pcm_plug.c pcm_plug: Clear plugins on all error conditions 2016-10-20 07:05:12 +02:00
pcm_plugin.c pcm: Remove home brew atomic operations 2016-07-11 15:25:30 +02:00
pcm_plugin.h pcm: Remove home brew atomic operations 2016-07-11 15:25:30 +02:00
pcm_rate.c pcm: Remove home brew atomic operations 2016-07-11 15:25:30 +02:00
pcm_rate_linear.c Introduce bswap.h for portable definitions of byte swap macros. 2016-03-03 16:18:10 +01:00
pcm_route.c pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
pcm_share.c pcm: drop unused sys/shm.h inclusion 2015-11-05 14:37:10 +01:00
pcm_shm.c Remove unused hostname resolution in shm plugins and aserver 2015-01-28 16:23:06 +01:00
pcm_simple.c pcm: remove alloca() from snd_spcm_init_duplex() 2016-07-14 16:33:50 +02:00
pcm_softvol.c ctl: rename APIs to add an element set so that their names are appropriate 2016-07-17 10:01:25 +02:00
pcm_symbols.c Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz 2007-10-15 10:24:55 +02:00
plugin_ops.h pcm: route: Use get32 for multi-source route calculation 2014-07-22 14:06:12 +02:00