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#ifndef CYGONCE_MEMALLOC_DLMALLOC_HXX

#define CYGONCE_MEMALLOC_DLMALLOC_HXX

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

//

//      dlmalloc.hxx

//

//      Interface to the port of Doug Lea's malloc implementation

//

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

//####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:         2000-06-18

// Purpose:      Define standard interface to Doug Lea's malloc implementation

// Description:  Doug Lea's malloc has been ported to eCos. This file provides

//               the interface between the implementation and the standard

//               memory allocator interface required by eCos

// Usage:        #include 

//

//

//####DESCRIPTIONEND####

//

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

// CONFIGURATION

#include 

#ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE

# include 

# ifdef CYGPKG_KERNEL

#  include 

# endif

#endif

// when used as an implementation for malloc, we need the following

// to let the system know the name of the class

#define CYGCLS_MEMALLOC_MALLOC_IMPL Cyg_Mempool_dlmalloc

// if the implementation is all that's required, don't output anything else

#ifndef __MALLOC_IMPL_WANTED

// INCLUDES

#include                       // size_t, ptrdiff_t

#include           // types

#ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE

# include     // kernel safe mempool template

#endif

#include  // dlmalloc implementation

#include        // Common memory allocator infra

#ifdef CYGFUN_KERNEL_THREADS_TIMER

# include           // cyg_tick_count

#endif

// TYPE DEFINITIONS

class Cyg_Mempool_dlmalloc

{

protected:

#ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE

    Cyg_Mempolt2 mypool;

#else

    Cyg_Mempool_dlmalloc_Implementation mypool;

#endif

public:

    // Constructor: gives the base and size of the arena in which memory is

    // to be carved out, note that management structures are taken from the

    // same arena.

    Cyg_Mempool_dlmalloc( cyg_uint8 *base, cyg_int32 size,

                          CYG_ADDRWORD argthru=0 )

        : mypool( base, size, argthru ) {}

    // Destructor

    ~Cyg_Mempool_dlmalloc() {}

    // get some memory; wait if none available

    // if we aren't configured to be thread-aware this is irrelevant

#ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE

    cyg_uint8 *

    alloc( cyg_int32 size ) { return mypool.alloc( size ); }

# ifdef CYGFUN_KERNEL_THREADS_TIMER

    // get some memory with a timeout

    cyg_uint8 *

    alloc( cyg_int32 size, cyg_tick_count delay_timeout ) {

        return mypool.alloc( size, delay_timeout );

    }

# endif

#endif

    // get some memory, return NULL if none available

    cyg_uint8 *

    try_alloc( cyg_int32 size ) { return mypool.try_alloc( 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 ) {

        return mypool.resize_alloc( alloc_ptr, newsize, oldsize);

    }

    // free the memory back to the pool

    // returns true on success

    cyg_bool

    free( cyg_uint8 *ptr, cyg_int32 size=0 ) { return mypool.free(ptr, size); }

    // 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 ) {

        // set to 0 - if there's anything really waiting, it will be set to

        // 1 later

        status.waiting = 0;

        mypool.get_status( flags, status );

    }

};

#endif // ifndef __MALLOC_IMPL_WANTED

#endif // ifndef CYGONCE_MEMALLOC_DLMALLOC_HXX

// EOF dlmalloc.hxx