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/vlib/threads.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'src/vlib/threads.h') diff --git a/src/vlib/threads.h b/src/vlib/threads.h index bb7c164c2e3..0e9cba52103 100644 --- a/src/vlib/threads.h +++ b/src/vlib/threads.h @@ -414,7 +414,7 @@ vlib_worker_thread_barrier_check (void) ed->thread_index = thread_index; } - clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, 1); + clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1); if (CLIB_DEBUG > 0) { vm = vlib_get_main (); @@ -424,7 +424,7 @@ vlib_worker_thread_barrier_check (void) ; if (CLIB_DEBUG > 0) vm->parked_at_barrier = 0; - clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, -1); + clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1); if (PREDICT_FALSE (*vlib_worker_threads->node_reforks_required)) { @@ -450,8 +450,8 @@ vlib_worker_thread_barrier_check (void) } vlib_worker_thread_node_refork (); - clib_smp_atomic_add (vlib_worker_threads->node_reforks_required, - -1); + clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required, + -1); while (*vlib_worker_threads->node_reforks_required) ; } @@ -519,7 +519,7 @@ vlib_get_frame_queue_elt (u32 frame_queue_index, u32 index) fq = fqm->vlib_frame_queues[index]; ASSERT (fq); - new_tail = __sync_add_and_fetch (&fq->tail, 1); + new_tail = clib_atomic_add_fetch (&fq->tail, 1); /* Wait until a ring slot is available */ while (new_tail >= fq->head_hint + fq->nelts) -- cgit 1.2.3-korg