mirror of https://gitee.com/bigwinds/arangodb
144 lines
4.9 KiB
C++
144 lines
4.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Condition Locker
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 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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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2008-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "ConditionLocker.h"
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#ifdef TRI_SHOW_LOCK_TIME
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#include "Basics/logging.h"
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#endif
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using namespace triagens::basics;
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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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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////////////////////////////////////////////////////////////////////////////////
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#ifdef TRI_SHOW_LOCK_TIME
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ConditionLocker::ConditionLocker (ConditionVariable* conditionVariable, char const* file, int line)
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: _conditionVariable(conditionVariable), _file(file), _line(line), _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) {
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_conditionVariable->lock();
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}
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#endif
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////////////////////////////////////////////////////////////////////////////////
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/// @brief unlocks the condition variable
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////////////////////////////////////////////////////////////////////////////////
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ConditionLocker::~ConditionLocker () {
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_conditionVariable->unlock();
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#ifdef TRI_SHOW_LOCK_TIME
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if (_time > TRI_SHOW_LOCK_THRESHOLD) {
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LOG_WARNING("ConditionLocker %s:%d took %f s", _file, _line, _time);
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}
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#endif
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief waits for an event to occur
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////////////////////////////////////////////////////////////////////////////////
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void ConditionLocker::wait () {
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_conditionVariable->wait();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief waits for an event to occur, with a timeout in microseconds
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////////////////////////////////////////////////////////////////////////////////
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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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////////////////////////////////////////////////////////////////////////////////
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/// @brief broadcasts an event
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////////////////////////////////////////////////////////////////////////////////
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void ConditionLocker::broadcast () {
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_conditionVariable->broadcast();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief signals an event
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////////////////////////////////////////////////////////////////////////////////
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void ConditionLocker::signal () {
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_conditionVariable->signal();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief unlocks the variable (handle with care, no exception allowed)
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////////////////////////////////////////////////////////////////////////////////
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void ConditionLocker::unlock () {
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_conditionVariable->unlock();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief relock the variable after unlock
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////////////////////////////////////////////////////////////////////////////////
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void ConditionLocker::lock () {
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_conditionVariable->lock();
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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