upload android base code part6

android/system/libufdt/include/ufdt_node_pool.h

@@ -0,0 +1,36 @@
+#ifndef UFDT_NODE_POOL_H
+#define UFDT_NODE_POOL_H
+
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+struct ufdt_node_pool_block_header;
+
+struct ufdt_node_pool {
+  /* A single linked list contains all blocks.
+     Blocks with one or more unused entries are in front;
+     blocks without unused entry are in rear. */
+  struct ufdt_node_pool_block_header *first_block;
+  struct ufdt_node_pool_block_header **last_block_ptr;
+};
+
+void ufdt_node_pool_construct(struct ufdt_node_pool *pool);
+void ufdt_node_pool_destruct(struct ufdt_node_pool *pool);
+
+void *ufdt_node_pool_alloc(struct ufdt_node_pool *pool);
+void ufdt_node_pool_free(struct ufdt_node_pool *pool, void *node);
+
+#endif