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authorSirshak Das <sirshak.das@arm.com>2018-10-03 22:53:51 +0000
committerDamjan Marion <dmarion@me.com>2018-10-19 07:10:47 +0000
commit2f6d7bb93c157b874efb79a2d1583a4c368bf89a (patch)
tree05dc2867c598cbb8d711f074b4b0eb62dd464f41 /src/vppinfra/lock.h
parentbf3443b0f852f5a4c551d12f926defbd047f2161 (diff)
vppinfra: add atomic macros for __sync builtins
This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com> Reviewed-by: Steve Capper <steve.capper@arm.com>
Diffstat (limited to 'src/vppinfra/lock.h')
-rw-r--r--src/vppinfra/lock.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/vppinfra/lock.h b/src/vppinfra/lock.h
index dd79c40b7f2..4645378360d 100644
--- a/src/vppinfra/lock.h
+++ b/src/vppinfra/lock.h
@@ -73,7 +73,7 @@ clib_spinlock_free (clib_spinlock_t * p)
static_always_inline void
clib_spinlock_lock (clib_spinlock_t * p)
{
- while (__sync_lock_test_and_set (&(*p)->lock, 1))
+ while (clib_atomic_test_and_set (&(*p)->lock))
CLIB_PAUSE ();
CLIB_LOCK_DBG (p);
}
@@ -138,13 +138,13 @@ clib_rwlock_free (clib_rwlock_t * p)
always_inline void
clib_rwlock_reader_lock (clib_rwlock_t * p)
{
- while (__sync_lock_test_and_set (&(*p)->n_readers_lock, 1))
+ while (clib_atomic_test_and_set (&(*p)->n_readers_lock))
CLIB_PAUSE ();
(*p)->n_readers += 1;
if ((*p)->n_readers == 1)
{
- while (__sync_lock_test_and_set (&(*p)->writer_lock, 1))
+ while (clib_atomic_test_and_set (&(*p)->writer_lock))
CLIB_PAUSE ();
}
CLIB_MEMORY_BARRIER ();
@@ -159,7 +159,7 @@ clib_rwlock_reader_unlock (clib_rwlock_t * p)
ASSERT ((*p)->n_readers > 0);
CLIB_LOCK_DBG_CLEAR (p);
- while (__sync_lock_test_and_set (&(*p)->n_readers_lock, 1))
+ while (clib_atomic_test_and_set (&(*p)->n_readers_lock))
CLIB_PAUSE ();
(*p)->n_readers -= 1;
@@ -176,7 +176,7 @@ clib_rwlock_reader_unlock (clib_rwlock_t * p)
always_inline void
clib_rwlock_writer_lock (clib_rwlock_t * p)
{
- while (__sync_lock_test_and_set (&(*p)->writer_lock, 1))
+ while (clib_atomic_test_and_set (&(*p)->writer_lock))
CLIB_PAUSE ();
CLIB_LOCK_DBG (p);
}