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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/vnet/pg
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/vnet/pg')
-rw-r--r--src/vnet/pg/output.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/vnet/pg/output.c b/src/vnet/pg/output.c
index ab57deefd24..016e5b370e5 100644
--- a/src/vnet/pg/output.c
+++ b/src/vnet/pg/output.c
@@ -54,7 +54,7 @@ pg_output (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
pg_interface_t *pif = pool_elt_at_index (pg->interfaces, rd->dev_instance);
if (PREDICT_FALSE (pif->lockp != 0))
- while (__sync_lock_test_and_set (pif->lockp, 1))
+ while (clib_atomic_test_and_set (pif->lockp))
;
while (n_left > 0)
@@ -82,7 +82,8 @@ pg_output (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
vlib_buffer_free (vm, vlib_frame_args (frame), n_buffers);
if (PREDICT_FALSE (pif->lockp != 0))
- *pif->lockp = 0;
+ clib_atomic_release (pif->lockp);
+
return n_buffers;
}