/usr/include/dcmtk/ofstd/ofglobal.h is in libdcmtk-dev 3.6.2-3build3.
This file is owned by root:root, with mode 0o644.
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*
* Copyright (C) 1997-2010, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: ofstd
*
* Author: Marco Eichelberg
*
* Purpose: OFGlobal is a template class intended for the declaration
* of global objects, access to which is protected by a Mutex
* for multi-thread applications.
* class T must have copy constructor and assignment operator.
*
*
*/
#ifndef OFGLOBAL_H
#define OFGLOBAL_H
#include "dcmtk/config/osconfig.h"
#include "dcmtk/ofstd/ofthread.h" /* for class OFBool */
/** Template class which allows to declare global objects that are
* protected by a Mutex if used in multi-thread applications.
* Must be compiled with -DWITH_THREADS for multi-thread-operation.
* Template class T must have copy constructor and assignment operator.
*/
template <class T> class OFGlobal
{
public:
/** constructor.
* @param arg value to which this object is initialised
*/
OFGlobal(const T &arg)
: val(arg)
#ifdef WITH_THREADS
, theMutex()
#endif
{
}
/** destructor.
*/
virtual ~OFGlobal() { }
/** assigns new value to this object. If compiled for multi-thread operation,
* access to the value of the object is protected by a Mutex.
* @param arg new value
*/
void set(const T& arg)
{
#ifdef WITH_THREADS
theMutex.lock();
#endif
val = arg;
#ifdef WITH_THREADS
theMutex.unlock();
#endif
}
/** gets the value of this object. If compiled for multi-thread operation,
* access to the value of the object is protected by a Mutex.
* @param arg return value is assigned to this parameter.
*/
void xget(T& arg)
{
#ifdef WITH_THREADS
theMutex.lock();
#endif
arg = val;
#ifdef WITH_THREADS
theMutex.unlock();
#endif
}
/** returns the value of this object. If compiled for multi-thread operation,
* access to the value of the object is protected by a Mutex. The result
* is returned by value, not by reference.
* @return value of this object.
*/
T get()
{
#ifdef WITH_THREADS
theMutex.lock();
#endif
T result(val);
#ifdef WITH_THREADS
theMutex.unlock();
#endif
return result;
}
private:
/** value of this object
*/
T val;
#ifdef WITH_THREADS
/** if compiled for multi-thread operation, the Mutex protecting
* access to the value of this object.
*/
OFMutex theMutex;
#endif
/** unimplemented private default constructor */
OFGlobal();
/** unimplemented private copy constructor */
OFGlobal(const OFGlobal<T>& arg);
/** unimplemented private assignment operator */
const OFGlobal<T>& operator=(const OFGlobal<T>& arg);
};
#endif
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