mirror of https://gitee.com/bigwinds/arangodb
144 lines
3.8 KiB
C++
144 lines
3.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief tasks used to handle signals
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Dr. Frank Celler
|
|
/// @author Achim Brandt
|
|
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
|
|
/// @author Copyright 2008-2013, triAGENS GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "SignalTask.h"
|
|
|
|
#include "Basics/MutexLocker.h"
|
|
#include "Basics/logging.h"
|
|
|
|
#include "Scheduler/Scheduler.h"
|
|
|
|
using namespace triagens::basics;
|
|
using namespace triagens::rest;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
SignalTask::SignalTask ()
|
|
: Task("SignalTask") {
|
|
for (size_t i = 0; i < MAX_SIGNALS; ++i) {
|
|
watcher[i] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
SignalTask::~SignalTask () {
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// public methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool SignalTask::addSignal (int signal) {
|
|
MUTEX_LOCKER(changeLock);
|
|
|
|
if (signals.size() >= MAX_SIGNALS) {
|
|
LOG_ERROR("maximal number of signals reached");
|
|
return false;
|
|
}
|
|
else {
|
|
if (_scheduler != 0) {
|
|
_scheduler->unregisterTask(this);
|
|
}
|
|
|
|
signals.insert(signal);
|
|
|
|
if (_scheduler != 0) {
|
|
_scheduler->registerTask(this);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Task methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool SignalTask::setup (Scheduler* scheduler, EventLoop loop) {
|
|
this->_scheduler = scheduler;
|
|
this->_loop = loop;
|
|
|
|
size_t pos = 0;
|
|
|
|
for (std::set<int>::iterator i = signals.begin(); i != signals.end() && pos < MAX_SIGNALS; ++i, ++pos) {
|
|
watcher[pos] = scheduler->installSignalEvent(loop, this, *i);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
void SignalTask::cleanup () {
|
|
if (_scheduler == 0) {
|
|
LOG_WARNING("In SignalTask::cleanup the scheduler has disappeared -- invalid pointer");
|
|
}
|
|
for (size_t pos = 0; pos < signals.size() && pos < MAX_SIGNALS; ++pos) {
|
|
if (_scheduler != 0) {
|
|
_scheduler->uninstallEvent(watcher[pos]);
|
|
}
|
|
watcher[pos] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
bool SignalTask::handleEvent (EventToken token, EventType revents) {
|
|
bool result = true;
|
|
|
|
if (revents & EVENT_SIGNAL) {
|
|
for (size_t pos = 0; pos < signals.size() && pos < MAX_SIGNALS; ++pos) {
|
|
if (token == watcher[pos]) {
|
|
result = handleSignal();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
bool SignalTask::needsMainEventLoop () const {
|
|
return true;
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- END-OF-FILE
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
|
|
// End:
|