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/gre/gre.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/vnet/gre/gre.c') diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c index e82befe7918..070c78e8984 100644 --- a/src/vnet/gre/gre.c +++ b/src/vnet/gre/gre.c @@ -406,7 +406,7 @@ gre_interface_tx (vlib_main_t * vm, /* Encap GRE seq# and ERSPAN type II header */ vlib_buffer_advance (b0, -sizeof (erspan_t2_t)); erspan_t2_t *h0 = vlib_buffer_get_current (b0); - u32 seq_num = clib_smp_atomic_add (>0->gre_sn->seq_num, 1); + u32 seq_num = clib_atomic_fetch_add (>0->gre_sn->seq_num, 1); u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h0->seq_num = clib_host_to_net_u32 (seq_num); h0->t2_u64 = hdr; @@ -418,7 +418,7 @@ gre_interface_tx (vlib_main_t * vm, /* Encap GRE seq# and ERSPAN type II header */ vlib_buffer_advance (b1, -sizeof (erspan_t2_t)); erspan_t2_t *h1 = vlib_buffer_get_current (b1); - u32 seq_num = clib_smp_atomic_add (>1->gre_sn->seq_num, 1); + u32 seq_num = clib_atomic_fetch_add (>1->gre_sn->seq_num, 1); u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h1->seq_num = clib_host_to_net_u32 (seq_num); h1->t2_u64 = hdr; @@ -473,7 +473,7 @@ gre_interface_tx (vlib_main_t * vm, /* Encap GRE seq# and ERSPAN type II header */ vlib_buffer_advance (b0, -sizeof (erspan_t2_t)); erspan_t2_t *h0 = vlib_buffer_get_current (b0); - u32 seq_num = clib_smp_atomic_add (>0->gre_sn->seq_num, 1); + u32 seq_num = clib_atomic_fetch_add (>0->gre_sn->seq_num, 1); u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h0->seq_num = clib_host_to_net_u32 (seq_num); h0->t2_u64 = hdr; -- cgit 1.2.3-korg