mirror of https://gitee.com/bigwinds/arangodb
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 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
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGOD_SCHEDULER_SIGNAL_TASK_H
|
|
#define ARANGOD_SCHEDULER_SIGNAL_TASK_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
|
|
#include "Scheduler/Task.h"
|
|
|
|
#include "Basics/Mutex.h"
|
|
|
|
namespace arangodb {
|
|
namespace rest {
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @ingroup Scheduler
|
|
/// @brief task used to handle signals
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class SignalTask : virtual public Task {
|
|
public:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief maximal number of signals per task
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static size_t const MAX_SIGNALS = 10;
|
|
|
|
public:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructs a new task
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
SignalTask();
|
|
|
|
public:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief adds a signal which will be handled
|
|
///
|
|
/// Note that this method can be called on a signal task, which has already
|
|
/// been set up.
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool addSignal(int signal);
|
|
|
|
protected:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief called when the signal is received
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual bool handleSignal() = 0;
|
|
|
|
protected:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// destructor
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
~SignalTask();
|
|
|
|
protected:
|
|
bool setup(Scheduler*, EventLoop) override;
|
|
|
|
void cleanup() override;
|
|
|
|
bool handleEvent(EventToken, EventType) override;
|
|
|
|
bool needsMainEventLoop() const override;
|
|
|
|
protected:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief signal event
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
EventToken _watchers[MAX_SIGNALS];
|
|
|
|
private:
|
|
std::set<int> _signals;
|
|
Mutex _changeLock;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|