1 /* src/mm/memory.h - macros for memory management
3 Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: memory.h 7918 2007-05-20 20:42:18Z michi $
33 /* forward typedefs ***********************************************************/
35 typedef struct dumpblock_t dumpblock_t;
36 typedef struct dumpinfo_t dumpinfo_t;
45 /* ATTENTION: We need to define dumpblock_t and dumpinfo_t before
46 internal includes, as we need dumpinfo_t as nested structure in
49 /* dumpblock ******************************************************************/
51 #define DUMPBLOCKSIZE 2 << 13 /* 2 * 8192 bytes */
61 /* dump_allocation *************************************************************
63 This struct is used to record dump memory allocations for ENABLE_MEMCHECK.
65 *******************************************************************************/
67 #if defined(ENABLE_MEMCHECK)
68 typedef struct dump_allocation_t dump_allocation_t;
70 struct dump_allocation_t {
71 dump_allocation_t *next;
79 /* dumpinfo *******************************************************************/
82 dumpblock_t *currentdumpblock; /* the current top-most block */
83 s4 allocateddumpsize; /* allocated bytes in this area */
84 s4 useddumpsize; /* used bytes in this dump area */
85 #if defined(ENABLE_MEMCHECK)
86 dump_allocation_t *allocations; /* list of allocations in this area */
91 /* constants for ENABLE_MEMCHECK **********************************************/
93 #if defined(ENABLE_MEMCHECK)
94 #define MEMORY_CANARY_SIZE 16
95 #define MEMORY_CANARY_FIRST_BYTE 0xca
96 #define MEMORY_CLEAR_BYTE 0xa5
97 #endif /* defined(ENABLE_MEMCHECK) */
100 /* internal includes **********************************************************/
102 #include "mm/gc-common.h"
106 ---------------------------- Interface description -----------------------
108 There are two possible choices for allocating memory:
110 1. explicit allocating / deallocating
112 mem_alloc ..... allocate a memory block
113 mem_free ...... free a memory block
114 mem_realloc ... change size of a memory block (position may change)
115 mem_usage ..... amount of allocated memory
118 2. explicit allocating, automatic deallocating
120 dump_alloc .... allocate a memory block in the dump area
121 dump_realloc .. change size of a memory block (position may change)
122 dump_size ..... marks the current top of dump
123 dump_release .. free all memory requested after the mark
126 There are some useful macros:
128 NEW (type) ....... allocate memory for an element of type `type`
129 FREE (ptr,type) .. free memory
131 MNEW (type,num) .. allocate memory for an array
132 MFREE (ptr,type,num) .. free memory
134 MREALLOC (ptr,type,num1,num2) .. enlarge the array to size num2
136 These macros do the same except they operate on the dump area:
138 DNEW, DMNEW, DMREALLOC (there is no DFREE)
141 -------------------------------------------------------------------------------
145 MEMORY_ALIGN (pos, size) ... make pos divisible by size. always returns an
149 OFFSET (s,el) ....... returns the offset of 'el' in structure 's' in bytes.
151 MCOPY (dest,src,type,num) ... copy 'num' elements of type 'type'.
156 #define MEMORY_ALIGN(pos,size) ((((pos) + (size) - 1) / (size)) * (size))
157 #define PADDING(pos,size) (MEMORY_ALIGN((pos),(size)) - (pos))
158 #define OFFSET(s,el) ((s4) ((ptrint) &(((s*) 0)->el)))
161 #define NEW(type) ((type *) mem_alloc(sizeof(type)))
162 #define FREE(ptr,type) mem_free((ptr), sizeof(type))
164 #define MNEW(type,num) ((type *) mem_alloc(sizeof(type) * (num)))
165 #define MFREE(ptr,type,num) mem_free((ptr), sizeof(type) * (num))
167 #define MREALLOC(ptr,type,num1,num2) mem_realloc((ptr), sizeof(type) * (num1), \
168 sizeof(type) * (num2))
171 #define DNEW(type) ((type *) dump_alloc(sizeof(type)))
172 #define DMNEW(type,num) ((type *) dump_alloc(sizeof(type) * (num)))
173 #define DMREALLOC(ptr,type,num1,num2) dump_realloc((ptr), sizeof(type) * (num1), \
174 sizeof(type) * (num2))
176 #define MCOPY(dest,src,type,num) memcpy((dest), (src), sizeof(type) * (num))
177 #define MSET(ptr,byte,type,num) memset((ptr), (byte), sizeof(type) * (num))
178 #define MZERO(ptr,type,num) MSET(ptr,0,type,num)
179 #define MMOVE(dest,src,type,num) memmove((dest), (src), sizeof(type) * (num))
181 #define CNEW(type,num) ((type *) memory_cnew(sizeof(type) * (num)))
182 #define CFREE(ptr,num) memory_cfree((ptr),(num))
185 /* GC macros ******************************************************************/
187 #if !defined(ENABLE_GC_CACAO)
189 /* Uncollectable memory which can contain references */
191 #define GCNEW_UNCOLLECTABLE(type,num) ((type *) heap_alloc_uncollectable(sizeof(type) * (num)))
193 #define GCNEW(type) heap_alloc(sizeof(type), true, NULL, true)
194 #define GCMNEW(type,num) heap_alloc(sizeof(type) * (num), true, NULL, true)
196 #define GCFREE(ptr) heap_free((ptr))
201 /* function prototypes ********************************************************/
203 /* initializes the memory subsystem */
204 bool memory_init(void);
206 void *memory_mmap_anon(void *addr, size_t len, int prot, int flags);
208 void *memory_cnew(s4 size);
209 void memory_cfree(void *p, s4 size);
211 void *mem_alloc(s4 size);
212 void mem_free(void *m, s4 size);
213 void *mem_realloc(void *src, s4 len1, s4 len2);
215 #if defined(ENABLE_THREADS)
216 bool memory_start_thread(void);
219 void *dump_alloc(s4 size);
220 void *dump_realloc(void *src, s4 len1, s4 len2);
222 void dump_release(s4 size);
224 #endif /* _MEMORY_H */
228 * These are local overrides for various environment variables in Emacs.
229 * Please do not remove this and leave it at the end of the file, where
230 * Emacs will automagically detect them.
231 * ---------------------------------------------------------------------
234 * indent-tabs-mode: t
238 * vim:noexpandtab:sw=4:ts=4: