79 lines
2 KiB
C++
79 lines
2 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2012 Synergy Si Ltd.
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file LICENSE that should have accompanied this file.
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*
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* This package 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "arch/IArchMultithread.h"
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//! Mutual exclusion
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/*!
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A non-recursive mutual exclusion object. Only one thread at a time can
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hold a lock on a mutex. Any thread that attempts to lock a locked mutex
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will block until the mutex is unlocked. At that time, if any threads are
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blocked, exactly one waiting thread will acquire the lock and continue
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running. A thread may not lock a mutex it already owns the lock on; if
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it tries it will deadlock itself.
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*/
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class Mutex {
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public:
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Mutex();
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//! Equivalent to default c'tor
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/*!
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Copy c'tor doesn't copy anything. It just makes it possible to
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copy objects that contain a mutex.
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*/
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Mutex(const Mutex&);
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~Mutex();
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//! @name manipulators
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//@{
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//! Does nothing
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/*!
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This does nothing. It just makes it possible to assign objects
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that contain a mutex.
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*/
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Mutex& operator=(const Mutex&);
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//@}
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//! @name accessors
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//@{
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//! Lock the mutex
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/*!
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Locks the mutex, which must not have been previously locked by the
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calling thread. This blocks if the mutex is already locked by another
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thread.
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(cancellation point)
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*/
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void lock() const;
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//! Unlock the mutex
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/*!
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Unlocks the mutex, which must have been previously locked by the
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calling thread.
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*/
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void unlock() const;
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//@}
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private:
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friend class CondVarBase;
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ArchMutex m_mutex;
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};
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