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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/devices/virtio
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/devices/virtio')
-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index c77cdb6a2ee..dab8fa5fb3b 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -122,7 +122,7 @@ vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
static_always_inline int
vhost_user_vring_try_lock (vhost_user_intf_t * vui, u32 qid)
{
- return __sync_lock_test_and_set (vui->vring_locks[qid], 1);
+ return clib_atomic_test_and_set (vui->vring_locks[qid]);
}
/**
@@ -141,7 +141,7 @@ vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid)
static_always_inline void
vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid)
{
- *vui->vring_locks[qid] = 0;
+ clib_atomic_release (vui->vring_locks[qid]);
}
static_always_inline void