70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/**
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* Copyright (c) 2023 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_ls_switch_checker.h"
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#include "lib/ob_errno.h"
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#include "ob_ls.h"
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#include "share/ob_errno.h"
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namespace oceanbase
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{
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namespace storage
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{
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int ObLSSwitchChecker::check_online(ObLS *ls)
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{
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int ret = OB_SUCCESS;
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ls_ = ls;
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if (OB_ISNULL(ls)) {
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ret = OB_BAD_NULL_ERROR;
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} else {
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record_switch_epoch_ = ATOMIC_LOAD(&(ls_->switch_epoch_));
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if (!(record_switch_epoch_ & 1)) {
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ret = OB_LS_OFFLINE;
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}
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}
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return ret;
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}
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int ObLSSwitchChecker::check_ls_switch_state(ObLS *ls, bool &is_online)
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{
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int ret = OB_SUCCESS;
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ls_ = ls;
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if (OB_ISNULL(ls)) {
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ret = OB_BAD_NULL_ERROR;
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} else {
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record_switch_epoch_ = ATOMIC_LOAD(&(ls_->switch_epoch_));
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if (!(record_switch_epoch_ & 1)) {
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is_online = false;
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} else {
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is_online = true;
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}
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}
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return ret;
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}
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int ObLSSwitchChecker::double_check_epoch(bool &is_online) const
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{
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int ret = OB_SUCCESS;
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int64_t switch_state = 0;
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if (OB_ISNULL(ls_)) {
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ret = OB_NOT_INIT;
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} else if (FALSE_IT(switch_state = ATOMIC_LOAD(&(ls_->switch_epoch_)))) {
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} else if (OB_UNLIKELY(record_switch_epoch_ != switch_state)) {
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ret = OB_VERSION_NOT_MATCH;
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is_online = (switch_state & 1) ? false : true;
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}
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return ret;
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}
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}
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} |