[onert] Introduce checkpoint.h file

This commit introduces checkpoint.h file.
This header file contains Header and Footer structure.
It also has MAGIC_NUMBER and SCHEMA_VERSION for checkpoint format.

ONE-DCO-1.0-Signed-off-by: Jiyoung Yun <[email protected]>

runtime/onert/core/include/ir/train/Checkpoint.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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 __ONERT_IR_TRAIN_CHECKPOINT_H__
+#define __ONERT_IR_TRAIN_CHECKPOINT_H__
+
+namespace onert
+{
+namespace train
+{
+namespace checkpoint
+{
+
+struct __attribute__((packed)) Header
+{
+  uint16_t magic;
+  uint8_t schema;
+  uint8_t reserved;
+  uint32_t opt1_offset;
+  uint32_t opt2_offset;
+  uint32_t other_offset;
+  uint32_t length;
+};
+
+struct __attribute__((packed)) Footer
+{
+  uint32_t cur_step;
+  uint32_t cur_epoch;
+};
+
+constexpr uint16_t MAGIC_NUMBER = 429;
+constexpr uint8_t SCHEMA_VERSION = 1;
+
+} // namespace checkpoint
+} // namespace train
+} // namespace onert
+
+#endif // __ONERT_IR_TRAIN_CHECKPOINT_H__