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>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/vnet/session-apps/echo_client.c b/src/vnet/session-apps/echo_client.c
index 1ece0196dde..c3d838d49cc 100644
--- a/src/vnet/session-apps/echo_client.c
+++ b/src/vnet/session-apps/echo_client.c
@@ -263,8 +263,8 @@ echo_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 	{
 	  stream_session_t *s;
 
-	  __sync_fetch_and_add (&ecm->tx_total, sp->bytes_sent);
-	  __sync_fetch_and_add (&ecm->rx_total, sp->bytes_received);
+	  clib_atomic_fetch_add (&ecm->tx_total, sp->bytes_sent);
+	  clib_atomic_fetch_add (&ecm->rx_total, sp->bytes_received);
 	  s = session_get_from_handle_if_valid (sp->vpp_session_handle);
 
 	  if (s)
@@ -276,7 +276,7 @@ echo_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 
 	      vec_delete (connections_this_batch, 1, i);
 	      i--;
-	      __sync_fetch_and_add (&ecm->ready_connections, -1);
+	      clib_atomic_fetch_add (&ecm->ready_connections, -1);
 	    }
 	  else
 	    {
@@ -408,7 +408,7 @@ echo_clients_session_connected_callback (u32 app_index, u32 api_context,
     }
 
   vec_add1 (ecm->connection_index_by_thread[thread_index], session_index);
-  __sync_fetch_and_add (&ecm->ready_connections, 1);
+  clib_atomic_fetch_add (&ecm->ready_connections, 1);
   if (ecm->ready_connections == ecm->expected_connections)
     {
       ecm->run_test = ECHO_CLIENTS_RUNNING;