82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
|
|
* synergy -- mouse and keyboard sharing utility
|
|
* Copyright (C) 2002 Chris Schoeneman, Nick Bolton, Sorin Sbarnea
|
|
*
|
|
* This package is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* found in the file COPYING that should have accompanied this file.
|
|
*
|
|
* This package is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef CMUTEX_H
|
|
#define CMUTEX_H
|
|
|
|
#include "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 CMutex {
|
|
public:
|
|
CMutex();
|
|
//! Equivalent to default c'tor
|
|
/*!
|
|
Copy c'tor doesn't copy anything. It just makes it possible to
|
|
copy objects that contain a mutex.
|
|
*/
|
|
CMutex(const CMutex&);
|
|
~CMutex();
|
|
|
|
//! @name manipulators
|
|
//@{
|
|
|
|
//! Does nothing
|
|
/*!
|
|
This does nothing. It just makes it possible to assign objects
|
|
that contain a mutex.
|
|
*/
|
|
CMutex& operator=(const CMutex&);
|
|
|
|
//@}
|
|
//! @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 CCondVarBase;
|
|
CArchMutex m_mutex;
|
|
};
|
|
|
|
#endif
|