mirror of https://gitee.com/bigwinds/arangodb
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2017 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Daniel H. Larkin
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////////////////////////////////////////////////////////////////////////////////
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#include "Cache/ManagerTasks.h"
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#include "Basics/Common.h"
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#include "Cache/Cache.h"
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#include "Cache/Manager.h"
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#include "Cache/Metadata.h"
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using namespace arangodb::cache;
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FreeMemoryTask::FreeMemoryTask(Manager::TaskEnvironment environment,
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Manager* manager, std::shared_ptr<Cache> cache)
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: _environment(environment), _manager(manager), _cache(cache) {}
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FreeMemoryTask::~FreeMemoryTask() {}
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bool FreeMemoryTask::dispatch() {
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_manager->prepareTask(_environment);
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auto self = shared_from_this();
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return _manager->post([self, this](bool) -> void { run(); });
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}
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void FreeMemoryTask::run() {
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bool ran = _cache->freeMemory();
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if (ran) {
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_manager->_lock.writeLock();
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Metadata* metadata = _cache->metadata();
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metadata->writeLock();
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uint64_t reclaimed = metadata->hardUsageLimit - metadata->softUsageLimit;
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metadata->adjustLimits(metadata->softUsageLimit, metadata->softUsageLimit);
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metadata->toggleResizing();
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metadata->writeUnlock();
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_manager->_globalAllocation -= reclaimed;
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_manager->_lock.writeUnlock();
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}
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_manager->unprepareTask(_environment);
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}
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MigrateTask::MigrateTask(Manager::TaskEnvironment environment, Manager* manager,
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std::shared_ptr<Cache> cache, std::shared_ptr<Table> table)
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: _environment(environment), _manager(manager), _cache(cache), _table(table) {}
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MigrateTask::~MigrateTask() {}
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bool MigrateTask::dispatch() {
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_manager->prepareTask(_environment);
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auto self = shared_from_this();
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return _manager->post([self, this](bool) -> void { run(); });
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}
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void MigrateTask::run() {
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// do the actual migration
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bool ran = _cache->migrate(_table);
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if (!ran) {
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Metadata* metadata = _cache->metadata();
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metadata->writeLock();
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metadata->toggleMigrating();
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metadata->writeUnlock();
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_manager->reclaimTable(_table);
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}
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_manager->unprepareTask(_environment);
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}
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