/usr/include/SFML/System/Lock.hpp is in libsfml-dev 1.6+dfsg1-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_LOCK_HPP
#define SFML_LOCK_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/NonCopyable.hpp>
namespace sf
{
class Mutex;
////////////////////////////////////////////////////////////
/// Lock is an exception-safe automatic wrapper for
/// locking and unlocking mutexes
////////////////////////////////////////////////////////////
class SFML_API Lock : NonCopyable
{
public :
////////////////////////////////////////////////////////////
/// Construct the lock with a target mutex (lock it)
///
/// @param Mutex : Mutex to lock
///
////////////////////////////////////////////////////////////
Lock(Mutex& Mutex);
////////////////////////////////////////////////////////////
/// Destructor (unlocks the mutex)
///
////////////////////////////////////////////////////////////
~Lock();
private :
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
Mutex& myMutex; ///< Mutex to lock / unlock
};
} // namespace sf
#endif // SFML_LOCK_HPP
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