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| author | Rich Felker <dalias@aerifal.cx> | 2011-08-07 18:31:06 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-08-07 18:31:06 -0400 |
| commit | 140778582487fb082716eec74324d7b16beb2daf (patch) | |
| tree | 27003268f6f6757d9a0b6f2b64185e8b8e241b2c | |
| parent | cdfb725ca3e20e14c64ca8695496e430b89b3b2c (diff) | |
| download | musl-140778582487fb082716eec74324d7b16beb2daf.tar.gz | |
condition variable signal/bcast need not wake unless there are waiters
| -rw-r--r-- | src/thread/pthread_cond_broadcast.c | 4 | ||||
| -rw-r--r-- | src/thread/pthread_cond_signal.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/src/thread/pthread_cond_broadcast.c b/src/thread/pthread_cond_broadcast.c index 1d378c0b..30f7f6df 100644 --- a/src/thread/pthread_cond_broadcast.c +++ b/src/thread/pthread_cond_broadcast.c @@ -2,7 +2,7 @@ int pthread_cond_broadcast(pthread_cond_t *c) { - c->_c_block = 0; - __wake(&c->_c_block, -1, 0); + if (a_swap(&c->_c_block, 0)) + __wake(&c->_c_block, -1, 0); return 0; } diff --git a/src/thread/pthread_cond_signal.c b/src/thread/pthread_cond_signal.c index 574f5c79..a0211287 100644 --- a/src/thread/pthread_cond_signal.c +++ b/src/thread/pthread_cond_signal.c @@ -2,7 +2,7 @@ int pthread_cond_signal(pthread_cond_t *c) { - c->_c_block = 0; - __wake(&c->_c_block, 1, 0); + if (a_swap(&c->_c_block, 0)); + __wake(&c->_c_block, 1, 0); return 0; } |