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@@ -0,0 +1,331 @@
+#ifndef CYGONCE_MEMALLOC_MEMJOIN_INL
+#define CYGONCE_MEMALLOC_MEMJOIN_INL
+
+//==========================================================================
+//
+//      memjoin.inl
+//
+//      Pseudo memory pool used to join together other memory pools
+//
+//==========================================================================
+//####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:         2000-06-12
+// Purpose:      Implement 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 <cyg/memalloc/memjoin.hxx>
+//              
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/memalloc.h>
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>        // types
+#include <cyg/infra/cyg_ass.h>         // assertion macros
+#include <cyg/infra/cyg_trac.h>        // tracing macros
+#include <cyg/memalloc/memjoin.hxx>    // header for this file just in case
+
+
+// FUNCTIONS
+
+
+// -------------------------------------------------------------------------
+// find_pool_for_ptr returns the pool that ptr came from
+
+template <class T>
+inline T *
+Cyg_Mempool_Joined<T>::find_pool_for_ptr( const cyg_uint8 *ptr )
+{
+    cyg_uint8 i;
+
+    for ( i=0; i < poolcount; i++ ) {
+        if ( ptr >= pools[i].startaddr &&
+             ptr < pools[i].endaddr ) {
+            return pools[i].pool;
+        } // if
+    } // for
+    return NULL;
+} // Cyg_Mempool_Joined<T>::find_pool_for_ptr()
+
+
+// -------------------------------------------------------------------------
+// Constructor
+template <class T>
+inline
+Cyg_Mempool_Joined<T>::Cyg_Mempool_Joined( cyg_uint8 num_heaps, T *heaps[] )
+{
+    Cyg_Mempool_Status stat;
+    cyg_uint8 i;
+
+    CYG_REPORT_FUNCTION();
+    CYG_REPORT_FUNCARG2( "num_heaps=%u, heaps=%08x", (int)num_heaps, heaps );
+
+    CYG_CHECK_DATA_PTRC( heaps );
+
+    poolcount = num_heaps;
+
+    // allocate internal structures - this should work because we should be
+    // the first allocation for this pool; and if there isn't enough space
+    // for these teeny bits, what hope is there!
+    for (i=0; i<num_heaps; i++) {
+        pools = (struct pooldesc *)
+            heaps[i]->try_alloc( num_heaps * sizeof(struct pooldesc) );
+        if ( NULL != pools )
+            break;
+    } // for
+
+    CYG_ASSERT( pools != NULL,
+                "Couldn't allocate internal structures from any pools!");
+
+    // now set up internal structures
+    for (i=0; i<num_heaps; i++) {
+        pools[i].pool = heaps[i];
+        heaps[i]->get_status( CYG_MEMPOOL_STAT_ARENABASE|
+                              CYG_MEMPOOL_STAT_ARENASIZE,
+                              stat );
+
+        CYG_ASSERT( stat.arenabase != (const cyg_uint8 *)-1,
+                    "pool returns valid pool base" );
+        CYG_CHECK_DATA_PTR( stat.arenabase, "Bad arena location" );
+        CYG_ASSERT( stat.arenasize > 0, "pool returns valid pool size" );
+        
+        pools[i].startaddr = stat.arenabase;
+        pools[i].endaddr = stat.arenabase + stat.arenasize;
+    } // for
+
+    CYG_REPORT_RETURN();
+} // Cyg_Mempool_Joined<T>::Cyg_Mempool_Joined()
+
+
+
+// -------------------------------------------------------------------------
+// Destructor
+template <class T>
+inline
+Cyg_Mempool_Joined<T>::~Cyg_Mempool_Joined()
+{
+    CYG_REPORT_FUNCTION();
+    CYG_REPORT_FUNCARGVOID();
+    CYG_ASSERT( free( (cyg_uint8 *)pools, poolcount * sizeof(struct pooldesc) ),
+                "free failed!");
+    CYG_REPORT_RETURN();
+} // Cyg_Mempool_Joined<T>::~Cyg_Mempool_Joined()
+
+
+
+// -------------------------------------------------------------------------
+// get some memory, return NULL if none available
+template <class T>
+inline cyg_uint8 *
+Cyg_Mempool_Joined<T>::try_alloc( cyg_int32 size )
+{
+    cyg_uint8 i;
+    cyg_uint8 *ptr=NULL;
+
+    CYG_REPORT_FUNCTYPE( "returning memory at addr %08x" );
+    CYG_REPORT_FUNCARG1DV( size );
+
+    for (i=0; i<poolcount; i++) {
+        ptr = pools[i].pool->try_alloc( size );
+        if ( NULL != ptr )
+            break;
+    }
+
+    CYG_REPORT_RETVAL( ptr );
+    return ptr;
+} // Cyg_Mempool_Joined<T>::try_alloc()
+
+
+// -------------------------------------------------------------------------
+// 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
+template <class T>
+inline cyg_uint8 *
+Cyg_Mempool_Joined<T>::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
+                                     cyg_int32 *oldsize=NULL )
+{
+    T *pool;
+    cyg_bool ret;
+    
+    CYG_REPORT_FUNCTYPE( "success=" );
+    CYG_REPORT_FUNCARG3( "alloc_ptr=%08x, newsize=%d, &oldsize=%08x",
+                        alloc_ptr, newsize, oldsize );
+    CYG_CHECK_DATA_PTRC( alloc_ptr );
+    if (NULL != oldsize )
+        CYG_CHECK_DATA_PTRC( oldsize );
+
+    pool = find_pool_for_ptr( alloc_ptr );
+    CYG_ASSERT( NULL != pool, "Couldn't find pool for pointer!" );
+
+    ret = pool->resize_alloc( alloc_ptr, newsize, oldsize );
+
+    CYG_REPORT_RETVAL( ret );
+    return ret;    
+} // Cyg_Mempool_Joined<T>::resize_alloc()
+
+
+// -------------------------------------------------------------------------
+// free the memory back to the pool
+// returns true on success
+template <class T>
+inline cyg_bool
+Cyg_Mempool_Joined<T>::free( cyg_uint8 *ptr, cyg_int32 size )
+{
+    T *pool;
+    cyg_bool ret;
+
+    CYG_REPORT_FUNCTYPE("success=");
+    CYG_REPORT_FUNCARG2( "ptr=%08x, size=%d", ptr, size );
+    CYG_CHECK_DATA_PTRC( ptr );
+
+    pool = find_pool_for_ptr( ptr );
+    CYG_ASSERT( NULL != pool, "Couldn't find pool for pointer!" );
+
+    ret = pool->free( ptr, size );
+
+    CYG_REPORT_RETVAL( ret );
+    return ret;    
+} // Cyg_Mempool_Joined<T>::free()
+
+
+// -------------------------------------------------------------------------
+// Get memory pool status
+// flags is a bitmask of requested fields to fill in. The flags are
+// defined in common.hxx
+template <class T>
+inline void
+Cyg_Mempool_Joined<T>::get_status( cyg_mempool_status_flag_t flags,
+                                Cyg_Mempool_Status &status )
+{
+    cyg_uint8 i;
+    Cyg_Mempool_Status tmpstat;
+
+    status.arenasize      = status.freeblocks = 0;
+    status.totalallocated = status.totalfree  = 0;
+    status.maxfree        = status.origsize   = 0;
+
+    for ( i=0; i<poolcount; i++ ) {
+        if ( status.arenasize >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_ARENASIZE) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_ARENASIZE,
+                                           tmpstat );
+                if ( tmpstat.arenasize > 0)
+                    status.arenasize += tmpstat.arenasize;
+                else
+                    status.arenasize = -1;
+            } // if
+        } // if
+
+        if ( status.freeblocks >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_FREEBLOCKS) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_FREEBLOCKS,
+                                           tmpstat );
+                if ( tmpstat.freeblocks > 0 )
+                    status.freeblocks += tmpstat.freeblocks;
+                else
+                    status.freeblocks = -1;
+            } // if
+        } // if
+
+        if ( status.totalallocated >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_TOTALALLOCATED) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_TOTALALLOCATED,
+                                           tmpstat );
+                if ( tmpstat.totalallocated > 0 )
+                    status.totalallocated += tmpstat.totalallocated;
+                else
+                    status.totalallocated = -1;
+            } // if
+        } // if
+
+        if ( status.totalfree >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_TOTALFREE) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_TOTALFREE,
+                                           tmpstat );
+                if ( tmpstat.totalfree > 0 )
+                    status.totalfree += tmpstat.totalfree;
+                else
+                    status.totalfree = -1;
+            } // if
+        } // if
+
+        if ( status.maxfree >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_MAXFREE) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_MAXFREE, tmpstat );
+                if ( tmpstat.maxfree < 0 )
+                    status.maxfree = -1;
+                else if ( tmpstat.maxfree > status.maxfree )
+                    status.maxfree = tmpstat.maxfree;
+            } // if
+        } // if
+
+        if ( status.origsize >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_ORIGSIZE) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_ORIGSIZE, tmpstat );
+                if ( tmpstat.origsize > 0 )
+                    status.origsize += tmpstat.origsize;
+                else
+                    status.origsize = -1;
+            } // if
+        } // if
+
+        if ( status.maxoverhead >= 0 ) {
+            if ( 0 != (flags & CYG_MEMPOOL_STAT_MAXOVERHEAD) ) {
+                pools[i].pool->get_status( CYG_MEMPOOL_STAT_MAXOVERHEAD,
+                                           tmpstat );
+                if ( tmpstat.maxoverhead < 0 )
+                    status.maxoverhead = -1;
+                else if ( tmpstat.maxoverhead > status.maxoverhead )
+                    status.maxoverhead = tmpstat.maxoverhead;
+            } // if
+        } // if
+    } // for
+} // Cyg_Mempool_Joined<T>::get_status()
+
+
+// -------------------------------------------------------------------------
+
+#endif // ifndef CYGONCE_MEMALLOC_MEMJOIN_INL
+// EOF memjoin.inl