BaseFab.cpp

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/*
** (c) 1996-2000 The Regents of the University of California (through
** E.O. Lawrence Berkeley National Laboratory), subject to approval by
** the U.S. Department of Energy.  Your use of this software is under
** license -- the license agreement is attached and included in the
** directory as license.txt or you may contact Berkeley Lab's Technology
** Transfer Department at TTD@lbl.gov.  NOTICE OF U.S. GOVERNMENT RIGHTS.
** The Software was developed under funding from the U.S. Government
** which consequently retains certain rights as follows: the
** U.S. Government has been granted for itself and others acting on its
** behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, and perform publicly
** and display publicly.  Beginning five (5) years after the date
** permission to assert copyright is obtained from the U.S. Department of
** Energy, and subject to any subsequent five (5) year renewals, the
** U.S. Government is granted for itself and others acting on its behalf
** a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, distribute copies to
** the public, perform publicly and display publicly, and to permit
** others to do so.
*/


#include <winstd.H>

#include <BaseFab.H>
#include <BArena.H>
#include <CArena.H>
#include <Thread.H>

int BoxLib::BF_init::m_cnt = 0;

static ThreadSpecificData<Arena>* arena = 0;

BoxLib::BF_init::BF_init ()
{
    if (m_cnt++ == 0)
        arena = new ThreadSpecificData<Arena>;
}

BoxLib::BF_init::~BF_init ()
{
    if (--m_cnt == 0)
        delete arena;
}

Arena*
BoxLib::ResetArena (Arena* newarena)
{
    BL_ASSERT(newarena != 0);

    Arena* oldarena = arena->get();

    BL_ASSERT(oldarena != 0);

    arena->set(newarena);

    return oldarena;
}

Arena*
BoxLib::The_Arena ()
{
    BL_ASSERT(arena != 0);

    Arena* a = arena->get();

    if (a == 0)
    {
        arena->set(a = new BArena);
    }

    return a;
}

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