Feat : LWIP integration part3

Change-Id: I62998963da110827a410287eed90a22da7ae4222
Signed-off-by: satish.karunanithi <satish.fdio@gmail.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/stacks/lwip_stack/src/sbr/sbr_index_ring.h b/stacks/lwip_stack/src/sbr/sbr_index_ring.h
new file mode 100644
index 0000000..86e8345
--- /dev/null
+++ b/stacks/lwip_stack/src/sbr/sbr_index_ring.h
@@ -0,0 +1,61 @@
+/*
+*
+* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at:
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef _SBR_INDEX_RING_H_
+#define _SBR_INDEX_RING_H_
+
+#include "types.h"
+
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
+typedef struct
+{
+  union
+  {
+    struct
+    {
+      volatile u32 ver;
+      volatile u32 val;
+    };
+    u64 data;
+  };
+} sbr_index_node;
+
+typedef struct
+{
+  volatile u32 head;
+  i8 cache_space[124];
+  volatile u32 tail;
+  u32 num;
+  u32 mask;
+  sbr_index_node nodes[0];
+} sbr_index_ring;
+
+sbr_index_ring *sbr_create_index_ring (u32 num);
+int sbr_index_ring_enqueue (sbr_index_ring * ring, i32 val);
+int sbr_index_ring_dequeue (sbr_index_ring * ring, i32 * val);
+
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif
+
+#endif