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#ifndef CYGONCE_MEMALLOC_MEMJOIN_HXX

#define CYGONCE_MEMALLOC_MEMJOIN_HXX

//==========================================================================

//

//      memjoin.hxx

//

//      Pseudo memory pool used to join together other memory pools

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos 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 General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    jlarmour

// Contributors:

// Date:         2000-06-12

// Purpose:      Define joined up memory pool class interface

// Description:  Inline class for constructing a pseudo allocator that contains

//               multiple other allocators. It caters solely to the requirements

//               of the malloc implementation.

// Usage:        #include 

//

//

//####DESCRIPTIONEND####

//

//==========================================================================

// CONFIGURATION

#include 

// INCLUDES

#include         // types

//#include          // assertion macros

#include      // Common memory allocator infra

// TYPE DEFINITIONS

template 

class Cyg_Mempool_Joined

{

protected:

    struct pooldesc {

        const cyg_uint8 *startaddr;

        const cyg_uint8 *endaddr;

        T *pool;

    };

    struct pooldesc *pools;

    cyg_uint8 poolcount;

    T *

    find_pool_for_ptr( const cyg_uint8 * /* ptr */ );

public:

    // Constructor

    Cyg_Mempool_Joined( cyg_uint8 /* num_heaps */, T * /* heaps */[] );

    // Destructor

    ~Cyg_Mempool_Joined();

    // get some memory, return NULL if none available

    cyg_uint8 *

    try_alloc( cyg_int32 /* size */ );

    // resize existing allocation, if oldsize is non-NULL, previous

    // allocation size is placed into it. If previous size not available,

    // it is set to 0. NB previous allocation size may have been rounded up.

    // Occasionally the allocation can be adjusted *backwards* as well as,

    // or instead of forwards, therefore the address of the resized

    // allocation is returned, or NULL if no resizing was possible.

    // Note that this differs from ::realloc() in that no attempt is

    // made to call malloc() if resizing is not possible - that is left

    // to higher layers. The data is copied from old to new though.

    // The effects of alloc_ptr==NULL or newsize==0 are undefined

    cyg_uint8 *

    resize_alloc( cyg_uint8 * /* alloc_ptr */, cyg_int32 /* newsize */,

                  cyg_int32 * /* oldsize */ =NULL );

    // free the memory back to the pool

    // returns true on success

    cyg_bool

    free( cyg_uint8 * /* ptr */, cyg_int32 /* size */ =0 );

    // Get memory pool status

    // flags is a bitmask of requested fields to fill in. The flags are

    // defined in common.hxx

    void

    get_status( cyg_mempool_status_flag_t /* flags */,

                Cyg_Mempool_Status & /* status */ );

};

#include 

#endif // ifndef CYGONCE_MEMALLOC_MEMJOIN_HXX

// EOF memjoin.hxx