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+#ifndef CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
+#define CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
+
+//==========================================================================
+//
+// sepmetaimpl.hxx
+//
+// Variable block memory pool with separate metadata class declarations
+//
+//==========================================================================
+//####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: 2001-06-28
+// Purpose: Define Sepmetaimpl class interface
+// Description: Inline class for constructing a variable block allocator
+// with separate metadata.
+// Usage: #include <cyg/memalloc/sepmetaimpl.hxx>
+//
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+
+#include <cyg/infra/cyg_type.h>
+#include <pkgconf/memalloc.h>
+#include <cyg/memalloc/common.hxx> // Common memory allocator infra
+
+class Cyg_Mempool_Sepmeta_Implementation {
+protected:
+ // these constructors are explicitly disallowed
+ Cyg_Mempool_Sepmeta_Implementation() {};
+// Cyg_Mempool_Sepmeta_Implementation( Cyg_Mempool_Sepmeta_Implementation &ref )
+// {};
+ Cyg_Mempool_Sepmeta_Implementation &
+ operator=( Cyg_Mempool_Sepmeta_Implementation &ref )
+ { return ref; };
+
+ struct memdq {
+ struct memdq *prev, *next; // prev/next alloced/free block
+ struct memdq *memprev, *memnext; // prev/next block in memory
+ cyg_uint8 *mem; // memory address associated with this block
+ };
+
+ struct memdq allocedhead; // list of alloced memory
+ struct memdq freehead; // list of free memory
+ struct memdq memhead; // initial block on free list
+ struct memdq memend; // dummy memdq indicating the end
+ // of memory, as if it were alloced
+ struct memdq *freemetahead; // unused memdq's
+ cyg_uint8 *obase;
+ cyg_int32 osize;
+ cyg_uint8 *metabase;
+ cyg_int32 metasize;
+ cyg_uint8 *bottom;
+ cyg_uint8 *top;
+ cyg_int32 alignment;
+ cyg_int32 freemem;
+
+ // round up addresses according to required alignment of pool
+ cyg_uint8 *
+ alignup( cyg_uint8 *addr );
+
+ cyg_uint8 *
+ aligndown( cyg_uint8 *addr );
+
+ // round up addresses according to required alignment of metadata
+ cyg_uint8 *
+ alignmetaup( cyg_uint8 *addr );
+
+ cyg_uint8 *
+ alignmetadown( cyg_uint8 *addr );
+
+ // return the alloced dq at mem
+ struct memdq *
+ find_alloced_dq( cyg_uint8 *mem );
+
+ // returns a free dq of at least size, or NULL if none
+ struct memdq *
+ find_free_dq( cyg_int32 size );
+
+ // returns the free dq following mem
+ struct memdq *
+ find_free_dq_slot( cyg_uint8 *mem );
+
+ void
+ insert_free_block( struct memdq *freedq );
+
+ static void
+ copy_data( cyg_uint8 *dst, cyg_uint8 *src, cyg_int32 nbytes );
+
+ void
+ check_free_memdq( struct memdq *dq );
+
+ void
+ check_alloced_memdq( struct memdq *dq );
+
+public:
+ // THIS is the public API of memory pools generally that can have the
+ // kernel oriented thread-safe package layer atop.
+
+ struct constructorargs {
+ cyg_int32 alignment;
+ cyg_uint8 *metabase;
+ cyg_uint32 metasize;
+ constructorargs(cyg_int32 align, cyg_uint8 *mbase, cyg_uint32 msize)
+ {
+ alignment = align; metabase = mbase; metasize = msize;
+ }
+ };
+
+ // Constructor: gives the base and size of the arena in which memory is
+ // to be carved out.
+ Cyg_Mempool_Sepmeta_Implementation(
+ cyg_uint8 * /* base */,
+ cyg_int32 /* size */,
+ CYG_ADDRWORD /* constructorargs */ );
+
+ // Destructor
+ ~Cyg_Mempool_Sepmeta_Implementation();
+
+ // get size bytes of memory
+ 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 */ );
+
+ // free size bytes of memory back to the pool
+ // returns true on success
+ cyg_bool
+ free( cyg_uint8 * /* ptr */,
+ cyg_int32 /* 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 */ );
+
+};
+
+#include <cyg/memalloc/sepmetaimpl.inl>
+
+// -------------------------------------------------------------------------
+#endif // ifndef CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
+// EOF sepmetaimpl.hxx