patch 4.0

2022-10-24 10:34:53 +08:00
parent 4ad6e00ec3
commit 93a1074b0c
10533 changed files with 2588271 additions and 2299373 deletions
--- a/src/share/ob_delegate.h
+++ b/src/share/ob_delegate.h
@ -0,0 +1,55 @@
+/**
+ * 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.
+ */
+
+#ifndef OCEANBASE_SHARE_OB_DELEGATE_
+#define OCEANBASE_SHARE_OB_DELEGATE_
+#include <type_traits>
+
+// this one need put the define of delegate_obj before delegate of function.
+#define DELEGATE(delegate_obj, func_name)                       \
+  template <typename ...Args>                                   \
+  auto func_name(Args &&...args)                                \
+  ->decltype(delegate_obj.func_name(std::forward<Args>(args)...)) { \
+    return delegate_obj.func_name(std::forward<Args>(args)...); \
+  }
+
+#define DELEGATE_WITH_RET(delegate_obj, func_name, ret)         \
+  template <typename ...Args>                                   \
+    ret func_name(Args &&...args) {                             \
+    return delegate_obj.func_name(std::forward<Args>(args)...); \
+  }
+
+#define DELEGATE_PTR_WITH_RET(delegate_obj, func_name, ret)     \
+  template <typename ...Args>                                   \
+    ret func_name(Args &&...args) {                             \
+    return delegate_obj->func_name(std::forward<Args>(args)...); \
+  }
+
+#define DELEGATE_PTR_WITH_CHECK(delegate_obj, func_name)          \
+  template <typename ...Args>                                     \
+  int func_name(Args &&...args) {                                 \
+    int ret = OB_SUCCESS;                                         \
+    if (nullptr == delegate_obj) {                                \
+      ret = OB_NOT_INIT;                                          \
+    } else {                                                      \
+      ret = delegate_obj->func_name(std::forward<Args>(args)...); \
+    }                                                             \
+    return ret;                                                   \
+  }
+
+#define CONST_DELEGATE_WITH_RET(delegate_obj, func_name, ret) \
+  template <typename ...Args>                                   \
+  ret func_name(Args &&...args) const {                               \
+    return delegate_obj.func_name(std::forward<Args>(args)...); \
+  }
+
+#endif