1 /* src/mm/memory.h - macros for memory management
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
36 #include "mm/codememory.h"
37 #include "mm/dumpmemory.h"
40 /* constants for ENABLE_MEMCHECK **********************************************/
42 #if defined(ENABLE_MEMCHECK)
43 #define MEMORY_CANARY_SIZE 16
44 #define MEMORY_CANARY_FIRST_BYTE 0xca
45 #define MEMORY_CLEAR_BYTE 0xa5
46 #endif /* defined(ENABLE_MEMCHECK) */
49 /* internal includes **********************************************************/
51 #include "mm/gc-common.h"
55 ---------------------------- Interface description -----------------------
57 There are two possible choices for allocating memory:
59 1. explicit allocating / deallocating
61 mem_alloc ..... allocate a memory block
62 mem_free ...... free a memory block
63 mem_realloc ... change size of a memory block (position may change)
64 mem_usage ..... amount of allocated memory
67 2. explicit allocating, automatic deallocating
69 dump_alloc .... allocate a memory block in the dump area
70 dump_realloc .. change size of a memory block (position may change)
71 dump_size ..... marks the current top of dump
72 dump_release .. free all memory requested after the mark
75 There are some useful macros:
77 NEW (type) ....... allocate memory for an element of type `type`
78 FREE (ptr,type) .. free memory
80 MNEW (type,num) .. allocate memory for an array
81 MFREE (ptr,type,num) .. free memory
83 MREALLOC (ptr,type,num1,num2) .. enlarge the array to size num2
85 These macros do the same except they operate on the dump area:
87 DNEW, DMNEW, DMREALLOC (there is no DFREE)
90 -------------------------------------------------------------------------------
94 MEMORY_ALIGN (pos, size) ... make pos divisible by size. always returns an
98 OFFSET (s,el) ....... returns the offset of 'el' in structure 's' in bytes.
100 MCOPY (dest,src,type,num) ... copy 'num' elements of type 'type'.
105 #define MEMORY_ALIGN(pos,size) ((((pos) + (size) - 1) / (size)) * (size))
106 #define PADDING(pos,size) (MEMORY_ALIGN((pos),(size)) - (pos))
107 #define OFFSET(s,el) ((s4) ((ptrint) &(((s*) 0)->el)))
110 #define NEW(type) ((type *) mem_alloc(sizeof(type)))
111 #define FREE(ptr,type) mem_free((ptr), sizeof(type))
113 #define MNEW(type,num) ((type *) mem_alloc(sizeof(type) * (num)))
114 #define MFREE(ptr,type,num) mem_free((ptr), sizeof(type) * (num))
116 #define MREALLOC(ptr,type,num1,num2) mem_realloc((ptr), sizeof(type) * (num1), \
117 sizeof(type) * (num2))
120 #define MCOPY(dest,src,type,num) memcpy((dest), (src), sizeof(type) * (num))
121 #define MSET(ptr,byte,type,num) memset((ptr), (byte), sizeof(type) * (num))
122 #define MZERO(ptr,type,num) MSET(ptr,0,type,num)
123 #define MMOVE(dest,src,type,num) memmove((dest), (src), sizeof(type) * (num))
126 /* GC macros (boehm only) *****************************************************/
128 #if defined(ENABLE_GC_BOEHM)
130 /* Uncollectable memory which can contain references */
132 #define GCNEW_UNCOLLECTABLE(type,num) ((type *) heap_alloc_uncollectable(sizeof(type) * (num)))
134 #define GCNEW(type) heap_alloc(sizeof(type), true, NULL, true)
135 #define GCMNEW(type,num) heap_alloc(sizeof(type) * (num), true, NULL, true)
137 #define GCFREE(ptr) heap_free((ptr))
142 /* function prototypes ********************************************************/
144 bool memory_init(void);
146 void memory_mprotect(void *addr, size_t len, int prot);
148 void *memory_checked_alloc(size_t size);
150 void *memory_cnew(s4 size);
151 void memory_cfree(void *p, s4 size);
153 void *mem_alloc(s4 size);
154 void mem_free(void *m, s4 size);
155 void *mem_realloc(void *src, s4 len1, s4 len2);
157 #if defined(ENABLE_THREADS)
158 bool memory_start_thread(void);
161 #endif /* _MEMORY_H */
165 * These are local overrides for various environment variables in Emacs.
166 * Please do not remove this and leave it at the end of the file, where
167 * Emacs will automagically detect them.
168 * ---------------------------------------------------------------------
171 * indent-tabs-mode: t
175 * vim:noexpandtab:sw=4:ts=4: