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/svm/message_queue.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/svm/message_queue.c') diff --git a/src/svm/message_queue.c b/src/svm/message_queue.c index a73a56d8044..13d089a97cc 100644 --- a/src/svm/message_queue.c +++ b/src/svm/message_queue.c @@ -108,7 +108,7 @@ svm_msg_q_alloc_msg_w_ring (svm_msg_q_t * mq, u32 ring_index) msg.ring_index = ring - mq->rings; msg.elt_index = ring->tail; ring->tail = (ring->tail + 1) % ring->nitems; - __sync_fetch_and_add (&ring->cursize, 1); + clib_atomic_fetch_add (&ring->cursize, 1); return msg; } @@ -155,7 +155,7 @@ svm_msg_q_alloc_msg (svm_msg_q_t * mq, u32 nbytes) msg.ring_index = ring - mq->rings; msg.elt_index = ring->tail; ring->tail = (ring->tail + 1) % ring->nitems; - __sync_fetch_and_add (&ring->cursize, 1); + clib_atomic_fetch_add (&ring->cursize, 1); break; } return msg; @@ -185,7 +185,7 @@ svm_msg_q_free_msg (svm_msg_q_t * mq, svm_msg_q_msg_t * msg) /* for now, expect messages to be processed in order */ ASSERT (0); } - __sync_fetch_and_sub (&ring->cursize, 1); + clib_atomic_fetch_sub (&ring->cursize, 1); } static int -- cgit 1.2.3-korg