mirror of https://gitee.com/bigwinds/arangodb
135 lines
4.4 KiB
C++
135 lines
4.4 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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#ifndef ARANGOD_SCHEDULER_SCHEDULER_LIBEV_H
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#define ARANGOD_SCHEDULER_SCHEDULER_LIBEV_H 1
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#include "Basics/Common.h"
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#include "Scheduler/Scheduler.h"
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#include "Basics/Mutex.h"
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namespace arangodb {
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namespace rest {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief input-output scheduler using libev
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////////////////////////////////////////////////////////////////////////////////
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class SchedulerLibev : public Scheduler {
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private:
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SchedulerLibev(SchedulerLibev const&);
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SchedulerLibev& operator=(SchedulerLibev const&);
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief returns the available backends
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//////////////////////////////////////////////////////////////////////////////
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static int availableBackends();
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//////////////////////////////////////////////////////////////////////////////
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/// @brief switch the libev allocator
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//////////////////////////////////////////////////////////////////////////////
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static void switchAllocator();
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief creates a scheduler
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//////////////////////////////////////////////////////////////////////////////
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explicit SchedulerLibev(size_t nrThreads = 1, int backend = BACKEND_AUTO);
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//////////////////////////////////////////////////////////////////////////////
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/// @brief deletes a scheduler
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//////////////////////////////////////////////////////////////////////////////
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~SchedulerLibev();
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public:
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void eventLoop(EventLoop) override;
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void wakeupLoop(EventLoop) override;
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EventToken installSocketEvent(EventLoop, EventType, Task*,
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TRI_socket_t) override;
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void startSocketEvents(EventToken) override;
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void stopSocketEvents(EventToken) override;
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EventToken installTimerEvent(EventLoop, Task*, double timeout) override;
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void clearTimer(EventToken) override;
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void rearmTimer(EventToken, double timeout) override;
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EventToken installPeriodicEvent(EventLoop, Task*, double offset,
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double interval) override;
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void rearmPeriodic(EventToken, double offset, double timeout) override;
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EventToken installSignalEvent(EventLoop, Task*, int signal) override;
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void uninstallEvent(EventToken) override;
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void signalTask(std::unique_ptr<TaskData>&) override;
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private:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief looks up an event lookup
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//////////////////////////////////////////////////////////////////////////////
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void* lookupLoop(EventLoop);
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private:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief backend to use
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//////////////////////////////////////////////////////////////////////////////
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int _backend;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief event loops
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//////////////////////////////////////////////////////////////////////////////
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void* _loops;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief event wakers
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//////////////////////////////////////////////////////////////////////////////
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void* _wakers;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief whether or not the allocator was switched
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//////////////////////////////////////////////////////////////////////////////
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static bool SwitchedAllocator;
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};
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}
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}
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#endif
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