70 lines
1.7 KiB
C++
70 lines
1.7 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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#include "ob_handle_list.h"
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namespace oceanbase
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{
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namespace common
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{
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void ObHandleList::init_handle(Handle& handle)
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{
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handle.reset();
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total_list_.add(&handle.total_list_);
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ATOMIC_AAF(&total_count_, 1);
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}
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void ObHandleList::destroy_handle(Handle& handle)
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{
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set_frozen(handle);
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total_list_.del(&handle.total_list_);
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ATOMIC_AAF(&total_count_, -1);
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}
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void ObHandleList::set_active(Handle& handle)
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{
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if (handle.set_active()) {
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active_list_.add(&handle.active_list_, handle);
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update_hazard();
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}
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handle.set_id(alloc_id());
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}
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void ObHandleList::set_frozen(Handle& handle)
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{
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if (handle.is_active()) {
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active_list_.del(&handle.active_list_);
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update_hazard();
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}
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handle.set_frozen();
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}
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void ObHandleList::update_hazard()
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{
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ATOMIC_STORE(&hazard_, calc_hazard());
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}
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int64_t ObHandleList::calc_hazard()
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{
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int64_t x = INT64_MAX;
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DLink* last = active_list_.tail_.prev_;
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if (&active_list_.head_ != last) {
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Handle* handle = CONTAINER_OF(last, Handle, active_list_);
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x = handle->get_clock();
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}
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COMMON_LOG(TRACE, "HandleList.calc_hazard", K(x));
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return x;
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}
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}; // end namespace common
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}; // end namespace oceanbase
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