Mercurial > ecos

annotate packages/services/memalloc/common/current/include/sepmetaimpl.hxx @ 208:e0c0827131d1 ecos

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 3902ef905c9c
children d2c90368aeef
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
176
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
1 #ifndef CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
2 #define CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
3
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
4 //==========================================================================
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
5 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
6 // sepmetaimpl.hxx
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
7 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
8 // Variable block memory pool with separate metadata class declarations
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
9 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
10 //==========================================================================
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
11 //####ECOSGPLCOPYRIGHTBEGIN####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
12 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
13 // This file is part of eCos, the Embedded Configurable Operating System.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
15 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
16 // eCos is free software; you can redistribute it and/or modify it under
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
17 // the terms of the GNU General Public License as published by the Free
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
18 // Software Foundation; either version 2 or (at your option) any later version.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
19 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
23 // for more details.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
24 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
25 // You should have received a copy of the GNU General Public License along
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
26 // with eCos; if not, write to the Free Software Foundation, Inc.,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
28 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
29 // As a special exception, if other files instantiate templates or use macros
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
30 // or inline functions from this file, or you compile this file and link it
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
31 // with other works to produce a work based on this file, this file does not
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
32 // by itself cause the resulting work to be covered by the GNU General Public
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
33 // License. However the source code for this file must still be made available
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
34 // in accordance with section (3) of the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
35 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
36 // This exception does not invalidate any other reasons why a work based on
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
37 // this file might be covered by the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
38 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
40 // at http://sources.redhat.com/ecos/ecos-license
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
41 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 176
diff changeset
42 //####ECOSGPLCOPYRIGHTEND####
176
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
43 //==========================================================================
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
44 //#####DESCRIPTIONBEGIN####
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
45 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
46 // Author(s): jlarmour
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
47 // Contributors:
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
48 // Date: 2001-06-28
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
49 // Purpose: Define Sepmetaimpl class interface
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
50 // Description: Inline class for constructing a variable block allocator
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
51 // with separate metadata.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
52 // Usage: #include <cyg/memalloc/sepmetaimpl.hxx>
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
53 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
54 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
55 //####DESCRIPTIONEND####
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
56 //
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
57 //==========================================================================
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
58
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
59
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
60 #include <cyg/infra/cyg_type.h>
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
61 #include <pkgconf/memalloc.h>
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
62 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
63
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
64 class Cyg_Mempool_Sepmeta_Implementation {
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
65 protected:
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
66 // these constructors are explicitly disallowed
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
67 Cyg_Mempool_Sepmeta_Implementation() {};
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
68 // Cyg_Mempool_Sepmeta_Implementation( Cyg_Mempool_Sepmeta_Implementation &ref )
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
69 // {};
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
70 Cyg_Mempool_Sepmeta_Implementation &
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
71 operator=( Cyg_Mempool_Sepmeta_Implementation &ref )
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
72 { return ref; };
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
73
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
74 struct memdq {
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
75 struct memdq *prev, *next; // prev/next alloced/free block
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
76 struct memdq *memprev, *memnext; // prev/next block in memory
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
77 cyg_uint8 *mem; // memory address associated with this block
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
78 };
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
79
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
80 struct memdq allocedhead; // list of alloced memory
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
81 struct memdq freehead; // list of free memory
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
82 struct memdq memhead; // initial block on free list
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
83 struct memdq memend; // dummy memdq indicating the end
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
84 // of memory, as if it were alloced
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
85 struct memdq *freemetahead; // unused memdq's
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
86 cyg_uint8 *obase;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
87 cyg_int32 osize;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
88 cyg_uint8 *metabase;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
89 cyg_int32 metasize;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
90 cyg_uint8 *bottom;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
91 cyg_uint8 *top;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
92 cyg_int32 alignment;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
93 cyg_int32 freemem;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
94
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
95 // round up addresses according to required alignment of pool
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
96 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
97 alignup( cyg_uint8 *addr );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
98
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
99 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
100 aligndown( cyg_uint8 *addr );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
101
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
102 // round up addresses according to required alignment of metadata
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
103 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
104 alignmetaup( cyg_uint8 *addr );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
105
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
106 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
107 alignmetadown( cyg_uint8 *addr );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
108
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
109 // return the alloced dq at mem
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
110 struct memdq *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
111 find_alloced_dq( cyg_uint8 *mem );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
112
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
113 // returns a free dq of at least size, or NULL if none
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
114 struct memdq *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
115 find_free_dq( cyg_int32 size );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
116
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
117 // returns the free dq following mem
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
118 struct memdq *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
119 find_free_dq_slot( cyg_uint8 *mem );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
120
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
121 void
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
122 insert_free_block( struct memdq *freedq );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
123
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
124 static void
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
125 copy_data( cyg_uint8 *dst, cyg_uint8 *src, cyg_int32 nbytes );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
126
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
127 void
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
128 check_free_memdq( struct memdq *dq );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
129
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
130 void
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
131 check_alloced_memdq( struct memdq *dq );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
132
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
133 public:
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
134 // THIS is the public API of memory pools generally that can have the
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
135 // kernel oriented thread-safe package layer atop.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
136
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
137 struct constructorargs {
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
138 cyg_int32 alignment;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
139 cyg_uint8 *metabase;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
140 cyg_uint32 metasize;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
141 constructorargs(cyg_int32 align, cyg_uint8 *mbase, cyg_uint32 msize)
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
142 {
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
143 alignment = align; metabase = mbase; metasize = msize;
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
144 }
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
145 };
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
146
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
147 // Constructor: gives the base and size of the arena in which memory is
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
148 // to be carved out.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
149 Cyg_Mempool_Sepmeta_Implementation(
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
150 cyg_uint8 * /* base */,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
151 cyg_int32 /* size */,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
152 CYG_ADDRWORD /* constructorargs */ );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
153
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
154 // Destructor
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
155 ~Cyg_Mempool_Sepmeta_Implementation();
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
156
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
157 // get size bytes of memory
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
158 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
159 try_alloc( cyg_int32 /* size */ );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
160
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
161 // resize existing allocation, if oldsize is non-NULL, previous
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
162 // allocation size is placed into it. If previous size not available,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
163 // it is set to 0. NB previous allocation size may have been rounded up.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
164 // Occasionally the allocation can be adjusted *backwards* as well as,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
165 // or instead of forwards, therefore the address of the resized
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
166 // allocation is returned, or NULL if no resizing was possible.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
167 // Note that this differs from ::realloc() in that no attempt is
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
168 // made to call malloc() if resizing is not possible - that is left
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
169 // to higher layers. The data is copied from old to new though.
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
170 // The effects of alloc_ptr==NULL or newsize==0 are undefined
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
171 cyg_uint8 *
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
172 resize_alloc( cyg_uint8 * /* alloc_ptr */, cyg_int32 /* newsize */,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
173 cyg_int32 * /* oldsize */ );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
174
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
175 // free size bytes of memory back to the pool
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
176 // returns true on success
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
177 cyg_bool
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
178 free( cyg_uint8 * /* ptr */,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
179 cyg_int32 /* size */ );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
180
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
181 // Get memory pool status
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
182 // flags is a bitmask of requested fields to fill in. The flags are
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
183 // defined in common.hxx
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
184 void
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
185 get_status( cyg_mempool_status_flag_t /* flags */,
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
186 Cyg_Mempool_Status & /* status */ );
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
187
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
188 };
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
189
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
190 #include <cyg/memalloc/sepmetaimpl.inl>
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
191
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
192 // -------------------------------------------------------------------------
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
193 #endif // ifndef CYGONCE_MEMALLOC_SEPMETAIMPL_HXX
3902ef905c9c Merge from eCos master repository on 2001-08-03-06:43:13-BST
jlarmour
parents:
diff changeset
194 // EOF sepmetaimpl.hxx