diff options
| author | Torvald Riegel <triegel@redhat.com> | 2016-06-14 15:12:00 +0200 |
|---|---|---|
| committer | Torvald Riegel <triegel@redhat.com> | 2016-06-24 23:04:40 +0300 |
| commit | 76a0b73e8102c5bfb5cb791e34992472f5d1d33e (patch) | |
| tree | 2fcd8ece66b944eed3ca046d79651c7a7573736f /nscd | |
| parent | 40244be3729149ff440caf18e445ec17b0d0b511 (diff) | |
| download | glibc-76a0b73e8102c5bfb5cb791e34992472f5d1d33e.tar.gz | |
Remove atomic_compare_and_exchange_bool_rel.
atomic_compare_and_exchange_bool_rel and
catomic_compare_and_exchange_bool_rel are removed and replaced with the
new C11-like atomic_compare_exchange_weak_release. The concurrent code
in nscd/cache.c has not been reviewed yet, so this patch does not add
detailed comments.
* nscd/cache.c (cache_add): Use new C11-like atomic operation instead
of atomic_compare_and_exchange_bool_rel.
* nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_full): Likewise.
* include/atomic.h (atomic_compare_and_exchange_bool_rel,
catomic_compare_and_exchange_bool_rel): Remove.
* sysdeps/aarch64/atomic-machine.h
(atomic_compare_and_exchange_bool_rel): Likewise.
* sysdeps/alpha/atomic-machine.h
(atomic_compare_and_exchange_bool_rel): Likewise.
* sysdeps/arm/atomic-machine.h
(atomic_compare_and_exchange_bool_rel): Likewise.
* sysdeps/mips/atomic-machine.h
(atomic_compare_and_exchange_bool_rel): Likewise.
* sysdeps/tile/atomic-machine.h
(atomic_compare_and_exchange_bool_rel): Likewise.
Diffstat (limited to 'nscd')
| -rw-r--r-- | nscd/cache.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/nscd/cache.c b/nscd/cache.c index 3021abd41e..daa0b2bfd1 100644 --- a/nscd/cache.c +++ b/nscd/cache.c @@ -178,12 +178,12 @@ cache_add (int type, const void *key, size_t len, struct datahead *packet, assert ((newp->packet & BLOCK_ALIGN_M1) == 0); /* Put the new entry in the first position. */ - do - newp->next = table->head->array[hash]; - while (atomic_compare_and_exchange_bool_rel (&table->head->array[hash], - (ref_t) ((char *) newp - - table->data), - (ref_t) newp->next)); + /* TODO Review concurrency. Use atomic_exchange_release. */ + newp->next = atomic_load_relaxed (&table->head->array[hash]); + while (!atomic_compare_exchange_weak_release (&table->head->array[hash], + (ref_t *) &newp->next, + (ref_t) ((char *) newp + - table->data))); /* Update the statistics. */ if (packet->notfound) |