56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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* Copyright 2003-2016 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_EVENT_MASK_MONITOR_HXX
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#define MPD_EVENT_MASK_MONITOR_HXX
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#include "check.h"
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#include "DeferredMonitor.hxx"
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#include "util/BindMethod.hxx"
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#include <atomic>
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/**
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* Manage a bit mask of events that have occurred. Every time the
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* mask becomes non-zero, OnMask() is called in #EventLoop's thread.
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*
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* This class is thread-safe.
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*/
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class MaskMonitor final : DeferredMonitor {
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typedef BoundMethod<void(unsigned)> Callback;
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const Callback callback;
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std::atomic_uint pending_mask;
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public:
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MaskMonitor(EventLoop &_loop, Callback _callback)
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:DeferredMonitor(_loop), callback(_callback), pending_mask(0) {}
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using DeferredMonitor::GetEventLoop;
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using DeferredMonitor::Cancel;
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void OrMask(unsigned new_mask);
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protected:
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/* virtual methode from class DeferredMonitor */
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void RunDeferred() override;
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};
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#endif
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