ce49d99c2f
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support. Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.
This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/*
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* Copyright 2003-2018 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_SOCKET_IDLE_MONITOR_HXX
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#define MPD_SOCKET_IDLE_MONITOR_HXX
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#include <boost/intrusive/list_hook.hpp>
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class EventLoop;
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/**
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* An event that runs when the EventLoop has become idle, before
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* waiting for more events.
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*
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* This class is not thread-safe, all methods must be called from the
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* thread that runs the #EventLoop, except where explicitly documented
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* as thread-safe.
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*/
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class IdleMonitor {
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friend class EventLoop;
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typedef boost::intrusive::list_member_hook<> ListHook;
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ListHook list_hook;
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EventLoop &loop;
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public:
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explicit IdleMonitor(EventLoop &_loop) noexcept
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:loop(_loop) {}
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~IdleMonitor() noexcept {
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#ifndef NDEBUG
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/* this check is redundant, it is only here to avoid
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the assertion in Cancel() */
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if (IsActive())
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#endif
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Cancel();
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}
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EventLoop &GetEventLoop() const noexcept {
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return loop;
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}
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bool IsActive() const noexcept {
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return list_hook.is_linked();
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}
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void Schedule() noexcept;
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void Cancel() noexcept;
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protected:
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virtual void OnIdle() noexcept = 0;
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private:
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void Run() noexcept;
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};
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#endif
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