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| author | Rich Felker <dalias@aerifal.cx> | 2011-09-28 18:00:02 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-09-28 18:00:02 -0400 |
| commit | 95b147967216a057d51a1b970da777486be716e3 (patch) | |
| tree | 04d5c77747955dfffea28bb0db6a26759505f8eb /src/thread/pthread_barrier_destroy.c | |
| parent | 8f4a115e7d38c31ad8d8c7233eaff2db270aebd8 (diff) | |
| download | musl-95b147967216a057d51a1b970da777486be716e3.tar.gz | |
next step making barrier self-sync'd destruction safe
i think this works, but it can be simplified. (next step)
Diffstat (limited to 'src/thread/pthread_barrier_destroy.c')
| -rw-r--r-- | src/thread/pthread_barrier_destroy.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/thread/pthread_barrier_destroy.c b/src/thread/pthread_barrier_destroy.c index 3ebc2b39..e0da197a 100644 --- a/src/thread/pthread_barrier_destroy.c +++ b/src/thread/pthread_barrier_destroy.c @@ -5,8 +5,12 @@ void __vm_lock(int), __vm_unlock(void); int pthread_barrier_destroy(pthread_barrier_t *b) { if (b->_b_limit < 0) { - int seq = b->_b_seq; - if (seq & 1) __wait(&b->_b_seq, 0, seq, 0); + if (b->_b_lock) { + int v; + a_or(&b->_b_lock, INT_MIN); + while ((v = b->_b_lock) & INT_MAX) + __wait(&b->_b_lock, 0, v, 0); + } __vm_lock(-1); __vm_unlock(); } |