69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
/*
|
|
* Deskflow -- mouse and keyboard sharing utility
|
|
* SPDX-FileCopyrightText: (C) 2012 - 2016 Synergy App Ltd
|
|
* SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
|
|
* SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "arch/IArchMultithread.h"
|
|
|
|
//! Mutual exclusion
|
|
/*!
|
|
A non-recursive mutual exclusion object. Only one thread at a time can
|
|
hold a lock on a mutex. Any thread that attempts to lock a locked mutex
|
|
will block until the mutex is unlocked. At that time, if any threads are
|
|
blocked, exactly one waiting thread will acquire the lock and continue
|
|
running. A thread may not lock a mutex it already owns the lock on; if
|
|
it tries it will deadlock itself.
|
|
*/
|
|
class Mutex
|
|
{
|
|
public:
|
|
Mutex();
|
|
//! Equivalent to default c'tor
|
|
/*!
|
|
Copy c'tor doesn't copy anything. It just makes it possible to
|
|
copy objects that contain a mutex.
|
|
*/
|
|
Mutex(const Mutex &);
|
|
~Mutex();
|
|
|
|
//! @name manipulators
|
|
//@{
|
|
|
|
//! Does nothing
|
|
/*!
|
|
This does nothing. It just makes it possible to assign objects
|
|
that contain a mutex.
|
|
*/
|
|
Mutex &operator=(const Mutex &);
|
|
|
|
//@}
|
|
//! @name accessors
|
|
//@{
|
|
|
|
//! Lock the mutex
|
|
/*!
|
|
Locks the mutex, which must not have been previously locked by the
|
|
calling thread. This blocks if the mutex is already locked by another
|
|
thread.
|
|
|
|
(cancellation point)
|
|
*/
|
|
void lock() const;
|
|
|
|
//! Unlock the mutex
|
|
/*!
|
|
Unlocks the mutex, which must have been previously locked by the
|
|
calling thread.
|
|
*/
|
|
void unlock() const;
|
|
|
|
//@}
|
|
|
|
private:
|
|
friend class CondVarBase;
|
|
ArchMutex m_mutex;
|
|
};
|