74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_PLAN_CACHE_OB_ID_MANAGER_ALLOCATOR_
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#define OCEANBASE_SQL_PLAN_CACHE_OB_ID_MANAGER_ALLOCATOR_
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#include "lib/allocator/ob_malloc.h"
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#include "lib/allocator/ob_allocator.h"
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#include "lib/allocator/ob_small_allocator.h"
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#include "lib/alloc/alloc_struct.h"
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namespace oceanbase {
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namespace sql {
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// ObIdManagerAllocator is used for small-size memory allocation.
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// Use ObSmallAllocator for size less than object_size_, else use ObMalloc.
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// ALLOC_MAGIC is used to mark and check the memory allocated.
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class ObIdManagerAllocator : public common::ObIAllocator {
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public:
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ObIdManagerAllocator();
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~ObIdManagerAllocator();
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int init(const int64_t obj_size, const char* label, uint64_t tenant_id_);
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void* alloc(const int64_t sz) override
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{
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return alloc_(sz);
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}
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void* alloc(const int64_t size, const common::ObMemAttr& attr) override
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{
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UNUSED(attr);
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return alloc(size);
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}
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void free(void* ptr) override
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{
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free_(ptr);
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}
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void reset();
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private:
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void* alloc_(int64_t sz);
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void free_(void* ptr);
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private:
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const static int64_t ALLOC_MAGIC = 0x1A4420844B;
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const static int64_t SMALL_ALLOC_SYMBOL = 0x38;
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const static int64_t M_ALLOC_SYMBOL = 0x7;
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const static int EXTEND_SIZE = sizeof(int64_t) * 2;
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const static int64_t BLOCK_SIZE = 16 * 1024; // 16K
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common::ObSmallAllocator small_alloc_;
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common::ObMalloc m_alloc_;
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lib::ObMemAttr mem_attr_;
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int64_t object_size_;
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bool inited_;
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private:
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DISALLOW_COPY_AND_ASSIGN(ObIdManagerAllocator);
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};
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} // namespace sql
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} // namespace oceanbase
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#endif // OCEANBASE_SQL_PLAN_CACHE_OB_ID_MANAGER_ALLOCATOR_
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