mirror of https://gitee.com/bigwinds/arangodb
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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 Dr. Frank Celler
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/// @author Achim Brandt
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////////////////////////////////////////////////////////////////////////////////
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#include "ConditionLocker.h"
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#include "Basics/ConditionVariable.h"
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#include "Basics/debugging.h"
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#ifdef ARANGODB_SHOW_LOCK_TIME
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#include "Logger/Logger.h"
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#endif
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using namespace arangodb::basics;
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/// @brief locks the condition variable
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///
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/// The constructors locks the condition variable, the destructors unlocks
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/// the condition variable
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#ifdef ARANGODB_SHOW_LOCK_TIME
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ConditionLocker::ConditionLocker(ConditionVariable* conditionVariable,
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char const* file, int line)
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: _conditionVariable(conditionVariable),
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_isLocked(true),
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_file(file),
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_line(line),
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_time(0.0) {
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double t = TRI_microtime();
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_conditionVariable->lock();
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_time = TRI_microtime() - t;
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}
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#else
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ConditionLocker::ConditionLocker(ConditionVariable* conditionVariable)
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: _conditionVariable(conditionVariable), _isLocked(true) {
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_conditionVariable->lock();
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}
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#endif
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/// @brief unlocks the condition variable
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ConditionLocker::~ConditionLocker() {
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if (_isLocked) {
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unlock();
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}
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#ifdef ARANGODB_SHOW_LOCK_TIME
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if (_time > TRI_SHOW_LOCK_THRESHOLD) {
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LOG_TOPIC("89086", WARN, arangodb::Logger::FIXME)
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<< "ConditionLocker " << _file << ":" << _line << " took " << _time << " s";
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}
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#endif
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}
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/// @brief waits for an event to occur
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void ConditionLocker::wait() { _conditionVariable->wait(); }
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/// @brief waits for an event to occur, with a timeout in microseconds
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/// returns true when the condition was signaled, false on timeout
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bool ConditionLocker::wait(uint64_t delay) {
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return _conditionVariable->wait(delay);
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}
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/// @brief waits for an event to occur, with a timeout
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/// returns true when the condition was signaled, false on timeout
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bool ConditionLocker::wait(std::chrono::microseconds timeout) {
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return _conditionVariable->wait(timeout.count());
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}
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/// @brief broadcasts an event
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void ConditionLocker::broadcast() { _conditionVariable->broadcast(); }
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/// @brief signals an event
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void ConditionLocker::signal() { _conditionVariable->signal(); }
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/// @brief unlocks the variable (handle with care, no exception allowed)
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void ConditionLocker::unlock() {
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if (_isLocked) {
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_conditionVariable->unlock();
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_isLocked = false;
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}
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}
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/// @brief relock the variable after unlock
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void ConditionLocker::lock() {
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TRI_ASSERT(!_isLocked);
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_conditionVariable->lock();
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_isLocked = true;
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}
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