ScopedFlag.h

Go to the documentation of this file.

/* Depends: A generic dependency tracker in C++
 * Copyright (c) 2004-2007, Ronald Landheer-Cieslak
 * All rights reserved
 * 
 * This is free software. You may distribute it and/or modify it and
 * distribute modified forms provided that the following terms are met:
 *
 * * Redistributions of the source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer;
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the distribution;
 * * None of the names of the authors of this software may be used to endorse
 *   or promote this software, derived software or any distribution of this 
 *   software or any distribution of which this software is part, without 
 *   prior written permission from the authors involved;
 * * Unless you have received a written statement from Ronald Landheer-Cieslak
 *   that says otherwise, the terms of the GNU General Public License, as 
 *   published by the Free Software Foundation, version 2 or (at your option)
 *   any later version, also apply.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _depends_details_scopedflag_h
#define _depends_details_scopedflag_h

namespace Depends
{
        namespace Details
        {
                template <class NodeType, typename FlagType = unsigned int>
                struct ScopedFlag
                {
                        ScopedFlag(NodeType * node, FlagType flag)
                                : node_(node),
                                  flag_(flag)
                        {
                                node->flags_ |= flag;
                        }

                        ~ScopedFlag()
                        {
                                node_->flags_ ^= flag_;
                                node_->flags_ &= ~flag_;
                        }

                        NodeType * node_;
                        FlagType flag_;
                };
        }
}

#endif

---