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| author | Rich Felker <dalias@aerifal.cx> | 2014-08-25 20:16:26 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2014-08-25 20:16:26 -0400 |
| commit | 97a7512b6819014d15c679c8998caa0006d13c29 (patch) | |
| tree | 0203f9cb4abd79be05dba04696903ef51e2dbc44 /src/thread/pthread_mutex_timedlock.c | |
| parent | 2ff714c6138da8abb50fd532503fd8d68a18811a (diff) | |
| download | musl-97a7512b6819014d15c679c8998caa0006d13c29.tar.gz | |
spin before waiting on futex in mutex and rwlock lock operations
Diffstat (limited to 'src/thread/pthread_mutex_timedlock.c')
| -rw-r--r-- | src/thread/pthread_mutex_timedlock.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/thread/pthread_mutex_timedlock.c b/src/thread/pthread_mutex_timedlock.c index 2a959d25..116a8b7b 100644 --- a/src/thread/pthread_mutex_timedlock.c +++ b/src/thread/pthread_mutex_timedlock.c @@ -8,6 +8,12 @@ int pthread_mutex_timedlock(pthread_mutex_t *restrict m, const struct timespec * int r, t, priv = (m->_m_type & 128) ^ 128; + r = pthread_mutex_trylock(m); + if (r != EBUSY) return r; + + int spins = 100; + while (spins-- && m->_m_lock) a_spin(); + while ((r=pthread_mutex_trylock(m)) == EBUSY) { if (!(r=m->_m_lock) || ((r&0x40000000) && (m->_m_type&4))) continue; |