1 /* mm/memory.h - macros for memory management
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 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., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Reinhard Grafl
29 $Id: memory.h 1815 2004-12-22 12:52:24Z twisti $
45 ---------------------------- Interface description -----------------------
47 There are two possible choices for allocating memory:
49 1. explicit allocating / deallocating
51 mem_alloc ..... allocate a memory block
52 mem_free ...... free a memory block
53 mem_realloc ... change size of a memory block (position may change)
54 mem_usage ..... amount of allocated memory
57 2. explicit allocating, automatic deallocating
59 dump_alloc .... allocate a memory block in the dump area
60 dump_realloc .. change size of a memory block (position may change)
61 dump_size ..... marks the current top of dump
62 dump_release .. free all memory requested after the mark
65 There are some useful macros:
67 NEW (type) ....... allocate memory for an element of type `type`
68 FREE (ptr,type) .. free memory
70 MNEW (type,num) .. allocate memory for an array
71 MFREE (ptr,type,num) .. free memory
73 MREALLOC (ptr,type,num1,num2) .. enlarge the array to size num2
75 These macros do the same except they operate on the dump area:
77 DNEW, DMNEW, DMREALLOC (there is no DFREE)
80 -------------------------------------------------------------------------------
84 ALIGN (pos, size) ... make pos divisible by size. always returns an
88 OFFSET (s,el) ....... returns the offset of 'el' in structure 's' in bytes.
90 MCOPY (dest,src,type,num) ... copy 'num' elements of type 'type'.
96 #define DUMPBLOCKSIZE 2 << 13 /* 2 * 8192 bytes */
100 /* dumpblock *******************************************************************
104 *******************************************************************************/
106 typedef struct dumpblock dumpblock;
115 /* dumpinfo ********************************************************************
119 *******************************************************************************/
121 typedef struct dumpinfo dumpinfo;
124 dumpblock *currentdumpblock;
125 s4 allocateddumpsize;
130 /* Uncollectable memory which can contain references */
132 #define GCNEW(type,num) ((type *) heap_alloc_uncollectable(sizeof(type) * (num)))
133 #define GCFREE(ptr) heap_free((ptr))
135 #define ALIGN(pos,size) ((((pos) + (size) - 1) / (size)) * (size))
136 #define PADDING(pos,size) (ALIGN((pos),(size)) - (pos))
137 #define OFFSET(s,el) ((int) ((size_t) & (((s*) 0)->el)))
140 #define NEW(type) ((type *) mem_alloc(sizeof(type)))
141 #define FREE(ptr,type) mem_free((ptr), sizeof(type))
143 #define MNEW(type,num) ((type *) mem_alloc(sizeof(type) * (num)))
144 #define MFREE(ptr,type,num) mem_free((ptr), sizeof(type) * (num))
145 #define MREALLOC(ptr,type,num1,num2) mem_realloc((ptr), sizeof(type) * (num1), \
146 sizeof(type) * (num2))
148 #define DNEW(type) ((type *) dump_alloc(sizeof(type)))
149 #define DMNEW(type,num) ((type *) dump_alloc(sizeof(type) * (num)))
150 #define DMREALLOC(ptr,type,num1,num2) dump_realloc((ptr), sizeof(type) * (num1), \
151 sizeof(type) * (num2))
153 #define MCOPY(dest,src,type,num) memcpy((dest), (src), sizeof(type) * (num))
154 #define MSET(ptr,byte,type,num) memset((ptr), (byte), sizeof(type) * (num))
156 #if defined(USE_CODEMMAP)
157 #define CNEW(type,num) ((type *) mem_mmap(sizeof(type) * (num)))
158 #define CFREE(ptr,num) /* nothing */
160 #define CNEW(type,num) ((type *) mem_alloc(sizeof(type) * (num)))
161 #define CFREE(ptr,num) mem_free((ptr), (num))
165 /* function prototypes ********************************************************/
167 void *mem_mmap(s4 size);
168 void *mem_alloc(s4 size);
169 void mem_free(void *m, s4 size);
170 void *mem_realloc(void *src, s4 len1, s4 len2);
172 void *dump_alloc(s4 size);
173 void *dump_realloc(void *src, s4 len1, s4 len2);
175 void dump_release(s4 size);
177 #endif /* _MEMORY_H */
181 * These are local overrides for various environment variables in Emacs.
182 * Please do not remove this and leave it at the end of the file, where
183 * Emacs will automagically detect them.
184 * ---------------------------------------------------------------------
187 * indent-tabs-mode: t