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@@ -0,0 +1,175 @@
+#ifndef CYGONCE_MEMALLOC_DLMALLOCIMPL_HXX
+#define CYGONCE_MEMALLOC_DLMALLOCIMPL_HXX
+
+//==========================================================================
+//
+//      dlmallocimpl.hxx
+//
+//      Interface to the port of Doug Lea's malloc implementation
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####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 <cyg/memalloc/dlmalloc.hxx>
+//              
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/memalloc.h>
+
+// INCLUDES
+
+#include <stddef.h>                    // size_t, ptrdiff_t
+#include <cyg/infra/cyg_type.h>        // types
+
+#include <cyg/memalloc/common.hxx>     // Common memory allocator infra
+
+// As a special case, override CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE
+// if the malloc config says so
+#ifdef CYGIMP_MEMALLOC_MALLOC_DLMALLOC
+// forward declaration to prevent header dependency problems
+class Cyg_Mempool_dlmalloc;
+# include <pkgconf/heaps.hxx>
+# if (CYGMEM_HEAP_COUNT > 1) && \
+     !defined(CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE)
+#  define CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE 1
+# endif
+#endif
+
+// CONSTANTS
+
+// number of bins - but changing this alone will not change the number of
+// bins!
+#define CYGPRI_MEMALLOC_ALLOCATOR_DLMALLOC_NAV 128
+
+// TYPE DEFINITIONS
+
+
+class Cyg_Mempool_dlmalloc_Implementation
+{
+public:
+    /* cyg_dlmalloc_size_t is the word-size used for internal bookkeeping
+       of chunk sizes. On a 64-bit machine, you can reduce malloc
+       overhead, especially for very small chunks, by defining
+       cyg_dlmalloc_size_t to be a 32-bit type at the expense of not
+       being able to handle requests greater than 2^31. This limitation is
+       hardly ever a concern; you are encouraged to set this. However, the
+       default version is the same as size_t. */
+
+    typedef size_t Cyg_dlmalloc_size_t;
+    
+    typedef struct malloc_chunk
+    {
+        Cyg_dlmalloc_size_t prev_size; /* Size of previous chunk (if free). */
+        Cyg_dlmalloc_size_t size;      /* Size in bytes, including overhead. */
+        struct malloc_chunk* fd;   /* double links -- used only if free. */
+        struct malloc_chunk* bk;
+    };
+    
+protected:
+    /* The first value returned from sbrk */
+    cyg_uint8 *arenabase;
+
+    /* The total memory in the pool */
+    cyg_int32 arenasize;
+
+#ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE
+    struct Cyg_Mempool_dlmalloc_Implementation::malloc_chunk *
+    av_[ CYGPRI_MEMALLOC_ALLOCATOR_DLMALLOC_NAV * 2 + 2 ];
+#endif
+
+#ifdef CYGDBG_MEMALLOC_ALLOCATOR_DLMALLOC_DEBUG
+
+    void
+    do_check_chunk( struct malloc_chunk * );
+
+    void
+    do_check_free_chunk( struct malloc_chunk * );
+    
+    void
+    do_check_inuse_chunk( struct malloc_chunk * );
+
+    void
+    do_check_malloced_chunk( struct malloc_chunk *, Cyg_dlmalloc_size_t );
+#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_Implementation( cyg_uint8 *  /* base */,
+                                         cyg_int32    /* size */,
+                                         CYG_ADDRWORD /* argthru */ );
+
+    // Destructor
+    ~Cyg_Mempool_dlmalloc_Implementation() {}
+
+    // 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 */ );
+
+    // 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 */ );
+
+};
+
+#endif // ifndef CYGONCE_MEMALLOC_DLMALLOCIMPL_HXX
+// EOF dlmallocimpl.hxx