PthreadKey.h

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//=============================================================================
//  PthreadKey template class.
//-----------------------------------------------------------------------------
//  POSIX Pthread class library
//  Copyright (C) 1997-1999  The University of Texas
//
//  This library is free software; you can redistribute it and/or modify it
//  under the terms of the GNU Library General Public License as published
//  by the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Library General Public License for more details.
//
//  The GNU Public License is available in the file LICENSE, or you
//  can write to the Free Software Foundation, Inc., 59 Temple Place -
//  Suite 330, Boston, MA 02111-1307, USA, or you can find it on the
//  World Wide Web at http://www.fsf.org.
//=============================================================================

#ifndef PthreadKey_h
#define PthreadKey_h
#pragma once

#include <cpn/common.h>
#include <cpn/threading/PthreadDefs.h>
#ifdef _POSIX_THREADS

#include <cpn/threading/PthreadErrorHandler.h>


template<class T>
class PthreadKey: public PthreadErrorHandler {
  public:
    PthreadKey(void (*destructor)(T) = 0)
        { TrapError(pthread_key_create(&theKey, (void(*)(void*))destructor)); }
   ~PthreadKey(void)
        { try { TrapError(pthread_key_delete(theKey)); } catch (...) { std::terminate(); } }

    operator pthread_key_t* (void)              { return &theKey; }
    operator const pthread_key_t* (void) const  { return &theKey; }

    T               Get(void) const
                    { return (T)pthread_getspecific(theKey); }

    PthreadKey<T>&  Set(T val)
                    {   TrapError(pthread_setspecific(theKey, (void*)val));
                        return *this;
                    }

  private:
    pthread_key_t   theKey;
};


#endif
#endif