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deps/easy/src/util/easy_array.c

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include "util/easy_array.h"
+
+easy_array_t* easy_array_create(int object_size)
+{
+  easy_pool_t* pool;
+  easy_array_t* array;
+
+  if ((pool = easy_pool_create(0)) == NULL)
+    return NULL;
+
+  if ((array = (easy_array_t*)easy_pool_alloc(pool, sizeof(easy_array_t))) == NULL)
+    return NULL;
+
+  easy_list_init(&array->list);
+  array->count = 0;
+  array->pool = pool;
+  array->object_size = easy_max(object_size, (int)sizeof(easy_list_t));
+
+  return array;
+}
+
+void easy_array_destroy(easy_array_t* array)
+{
+  easy_pool_destroy(array->pool);
+}
+
+void* easy_array_alloc(easy_array_t* array)
+{
+  if (easy_list_empty(&array->list) == 0) {
+    array->count--;
+    char* ptr = (char*)array->list.prev;
+    easy_list_del((easy_list_t*)ptr);
+    return ptr;
+  }
+
+  return easy_pool_alloc(array->pool, array->object_size);
+}
+
+void easy_array_free(easy_array_t* array, void* ptr)
+{
+  array->count++;
+  easy_list_add_tail((easy_list_t*)ptr, &array->list);
+}