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// Copyright (C) 2006 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#undef DLIB_AUTO_UNLOCK_EXTENSIOn_ABSTRACT_
#ifdef DLIB_AUTO_UNLOCK_EXTENSIOn_ABSTRACT_
#include "threads_kernel_abstract.h"
#include "rmutex_extension_abstract.h"
#include "read_write_mutex_extension_abstract.h"
namespace dlib
{
// ----------------------------------------------------------------------------------------
class auto_unlock
{
/*!
INITIAL VALUE
The mutex given in the constructor is associated with this object.
WHAT THIS OBJECT REPRESENTS
This object represents a mechanism for automatically unlocking
a mutex object. It is useful when you already have a locked mutex
and want to make sure it gets unlocked even if an exception is thrown
or you quit the function at a weird spot.
!*/
public:
explicit auto_unlock (
const mutex& m
);
/*!
ensures
- #*this is properly initialized
- does not modify m in any way
!*/
explicit auto_unlock (
const rmutex& m
);
/*!
ensures
- #*this is properly initialized
- does not modify m in any way
!*/
explicit auto_unlock (
const read_write_mutex& m
);
/*!
ensures
- #*this is properly initialized
- does not modify m in any way
!*/
~auto_unlock (
);
/*!
ensures
- all resources allocated by *this have been freed
- calls unlock() on the mutex associated with *this
!*/
private:
// restricted functions
auto_unlock(auto_unlock&); // copy constructor
auto_unlock& operator=(auto_unlock&); // assignment operator
};
// ----------------------------------------------------------------------------------------
class auto_unlock_readonly
{
/*!
INITIAL VALUE
The mutex given in the constructor is associated with this object.
WHAT THIS OBJECT REPRESENTS
This object represents a mechanism for automatically unlocking
a read_write_mutex object. It is useful when you already have a locked mutex
and want to make sure it gets unlocked even if an exception is thrown
or you quit the function at a weird spot. Note that the mutex
is unlocked by calling unlock_readonly() on it.
!*/
public:
explicit auto_unlock_readonly (
const read_write_mutex& m
);
/*!
ensures
- #*this is properly initialized
- does not modify m in any way
!*/
~auto_unlock_readonly (
);
/*!
ensures
- all resources allocated by *this have been freed
- calls unlock_readonly() on the mutex associated with *this
!*/
private:
// restricted functions
auto_unlock_readonly(auto_unlock_readonly&); // copy constructor
auto_unlock_readonly& operator=(auto_unlock_readonly&); // assignment operator
};
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_AUTO_UNLOCK_EXTENSIOn_ABSTRACT_
|
