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conf: Check the availability of PTHREAD_MUTEX_RECURSIVE

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Check the availability of PTHREAD_MUTEX_RECURSIVE in configure script
and use it only when possible.  A fairly old version of glibc still
seems working, but just to be sure.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-05-16 16:02:59 +02:00
parent 3cf3fbebdd
commit e757a95fc9
3 changed files with 13 additions and 0 deletions
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2
src/pcm/pcm.c
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@ -2600,7 +2600,9 @@ int snd_pcm_new(snd_pcm_t **pcmp, snd_pcm_type_t type, const char *name,
INIT_LIST_HEAD(&pcm->async_handlers);
#ifdef THREAD_SAFE_API
pthread_mutexattr_init(&attr);
#ifdef HAVE_PTHREAD_MUTEX_RECURSIVE
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
#endif
pthread_mutex_init(&pcm->lock, &attr);
/* use locking as default;
* each plugin may suppress this in its open call