mirror of https://gitee.com/bigwinds/arangodb
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief tasks used to handle asynchronous events
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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 "AsyncTask.h"
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#include "Basics/logging.h"
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#include "Scheduler/Scheduler.h"
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using namespace triagens::rest;
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// -----------------------------------------------------------------------------
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// constructors and destructors
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// -----------------------------------------------------------------------------
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AsyncTask::AsyncTask ()
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: Task("AsyncTask"),
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watcher(0) {
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}
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AsyncTask::~AsyncTask () {
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}
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// -----------------------------------------------------------------------------
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// public methods
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// -----------------------------------------------------------------------------
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void AsyncTask::signal () {
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_scheduler->sendAsync(watcher);
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}
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// -----------------------------------------------------------------------------
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// Task methods
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// -----------------------------------------------------------------------------
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bool AsyncTask::setup (Scheduler* scheduler,
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EventLoop loop) {
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this->_scheduler = scheduler;
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this->_loop = loop;
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watcher = scheduler->installAsyncEvent(loop, this);
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if (watcher == -1) {
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return false;
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}
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return true;
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}
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void AsyncTask::cleanup () {
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if (_scheduler == 0) {
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LOG_WARNING("In AsyncTask::cleanup the scheduler has disappeared -- invalid pointer");
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watcher = 0;
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return;
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}
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_scheduler->uninstallEvent(watcher);
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watcher = 0;
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}
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bool AsyncTask::handleEvent (EventToken token, EventType revents) {
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bool result = true;
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if (watcher == token && (revents & EVENT_ASYNC)) {
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result = handleAsync();
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}
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return result;
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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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