From 2f6d7bb93c157b874efb79a2d1583a4c368bf89a Mon Sep 17 00:00:00 2001 From: Sirshak Das Date: Wed, 3 Oct 2018 22:53:51 +0000 Subject: 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 Signed-off-by: Sirshak Das Reviewed-by: Honnappa Nagarahalli Reviewed-by: Ola Liljedahl Reviewed-by: Steve Capper --- src/vnet/pg/output.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'src/vnet/pg') 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; } -- cgit 1.2.3-korg