gazelle/0042-use-atomic-variales-to-count.patch

From 900685bd99e25f832c4aeac202dfb7d5f5075833 Mon Sep 17 00:00:00 2001
From: jiangheng <jiangheng12@huawei.com>
Date: Tue, 19 Apr 2022 20:01:34 +0800
Subject: [PATCH 03/18] use atomic variales to count

name_tick and pool_index are shared by mutiple threads.
atomic variables are required.
---
 src/lstack/core/lstack_lwip.c       | 9 +++++----
 src/lstack/core/lstack_thread_rpc.c | 3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/lstack/core/lstack_lwip.c b/src/lstack/core/lstack_lwip.c
index 887464d..4143f2f 100644
--- a/src/lstack/core/lstack_lwip.c
+++ b/src/lstack/core/lstack_lwip.c
@@ -11,6 +11,7 @@
 */
 
 #include <sys/types.h>
+#include <stdatomic.h>
 #include <lwip/sockets.h>
 #include <lwip/tcp.h>
 #include <lwipsock.h>
@@ -138,25 +139,25 @@ void gazelle_init_sock(int32_t fd)
 
     reset_sock_data(sock);
 
-    sock->recv_ring = create_ring("sock_recv", SOCK_RECV_RING_SIZE, 0, name_tick++);
+    sock->recv_ring = create_ring("sock_recv", SOCK_RECV_RING_SIZE, 0, atomic_fetch_add(&name_tick, 1));
     if (sock->recv_ring == NULL) {
         LSTACK_LOG(ERR, LSTACK, "sock_recv create failed. errno: %d.\n", rte_errno);
         return;
     }
 
-    sock->recv_wait_free = create_ring("wait_free", SOCK_RECV_RING_SIZE, 0, name_tick++);
+    sock->recv_wait_free = create_ring("wait_free", SOCK_RECV_RING_SIZE, 0, atomic_fecth_add(&name_tick, 1));
     if (sock->recv_wait_free == NULL) {
         LSTACK_LOG(ERR, LSTACK, "wait_free create failed. errno: %d.\n", rte_errno);
         return;
     }
 
-    sock->send_ring = create_ring("sock_send", SOCK_SEND_RING_SIZE, 0, name_tick++);
+    sock->send_ring = create_ring("sock_send", SOCK_SEND_RING_SIZE, 0, atomic_fecth_add(&name_tick, 1));
     if (sock->send_ring == NULL) {
         LSTACK_LOG(ERR, LSTACK, "sock_send create failed. errno: %d.\n", rte_errno);
         return;
     }
 
-    sock->send_idle_ring = create_ring("idle_send", SOCK_SEND_RING_SIZE, 0, name_tick++);
+    sock->send_idle_ring = create_ring("idle_send", SOCK_SEND_RING_SIZE, 0, atomic_fetch_add(&name_tick, 1));
     if (sock->send_idle_ring == NULL) {
         LSTACK_LOG(ERR, LSTACK, "idle_send create failed. errno: %d.\n", rte_errno);
         return;
diff --git a/src/lstack/core/lstack_thread_rpc.c b/src/lstack/core/lstack_thread_rpc.c
index 26725f7..312e192 100644
--- a/src/lstack/core/lstack_thread_rpc.c
+++ b/src/lstack/core/lstack_thread_rpc.c
@@ -10,6 +10,7 @@
 * See the Mulan PSL v2 for more details.
 */
 #include <sys/types.h>
+#include <stdatomic.h>
 #include <lwip/sockets.h>
 #include <lwipsock.h>
 #include <rte_mempool.h>
@@ -36,7 +37,7 @@ struct rpc_msg *rpc_msg_alloc(struct protocol_stack *stack, rpc_msg_func func)
 
     static uint16_t pool_index = 0;
     if (rpc_pool == NULL) {
-        rpc_pool = create_rpc_mempool("rpc_msg", pool_index++);
+        rpc_pool = create_rpc_mempool("rpc_msg", atomic_fetch_add(&pool_index, 1));
         if (rpc_pool == NULL) {
             return NULL;
         }
-- 
2.23.0