CriticalSectionBlock.H

Go to the documentation of this file.

// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
// 
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// Contributor Henner Zeller <H.Zeller@acm.org>

#ifndef __CRITICALSECTIONBLOCK_H
#define __CRITICALSECTIONBLOCK_H

#include <critsec.h>

class CriticalSectionBlock {
private:
        critsec_t *_critsec;
        char   _checkonceHackCounter;

public:
        CriticalSectionBlock (critsec_t *critsec) 
                : _critsec(critsec),
                  _checkonceHackCounter(1)
        { 
                enter_critical_section(_critsec);
        }
        
        inline bool checkonce() { return _checkonceHackCounter-- > 0; }

        ~CriticalSectionBlock () {
                leave_critical_section(_critsec);
        }
};

#define synchronized(cs) for(CriticalSectionBlock __currentlocked(cs);__currentlocked.checkonce();/* */)

/* 
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

#endif /* __CRITICALSECTIONBLOCK_H */

---