/usr/include/gnelib/Mutex.h is in libgnelib-dev 0.75+svn20091130-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | #ifndef MUTEX_H_INCLUDED_C51DB1E6
#define MUTEX_H_INCLUDED_C51DB1E6
/* GNE - Game Networking Engine, a portable multithreaded networking library.
* Copyright (C) 2001-2006 Jason Winnebeck
* Project website: http://www.gillius.org/gne/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
namespace GNE {
/**
* @ingroup threading
*
* The mutex class models a simple mutex to provide mutual exclusion to a
* resource shared by threads.
*
* This version of a mutex is recursive. This means that if a thread already
* owns the mutex, then a second lock will not deadlock. You need to unlock
* the mutex the same number of times it was locked to unlock it.
*/
class Mutex {
public:
/**
* Initializes this mutex.
*/
Mutex();
virtual ~Mutex();
/**
* Acquire the lock on a mutex, blocking if necessary.
* <ol><li>If the mutex is unlocked, lock it, and proceed.</li>
* <li>If the mutex is locked, wait for it to become unlocked, then go
* to step 1.</li></ol>
*/
void acquire();
/**
* Releases a locked mutex.
*/
void release();
private:
#ifdef _DEBUG
void markAcquired();
void markReleased();
#endif
private:
//These are used by Thread::currentThread to lock and unlock mapsync,
//because currentThread is used for debugging in the main methods.
friend class Thread;
void vanillaAcquire();
void vanillaRelease();
struct MutexData;
MutexData* data;
friend class ConditionVariable;
};
}
#endif /* MUTEX_H_INCLUDED_C51DB1E6 */
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