1 /* src/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 Changes: Christian Thalinger
31 $Id: memory.h 3583 2005-11-05 22:30:59Z twisti $
41 /* forward typedefs ***********************************************************/
43 typedef struct dumpblock dumpblock;
44 typedef struct dumpinfo dumpinfo;
54 ---------------------------- Interface description -----------------------
56 There are two possible choices for allocating memory:
58 1. explicit allocating / deallocating
60 mem_alloc ..... allocate a memory block
61 mem_free ...... free a memory block
62 mem_realloc ... change size of a memory block (position may change)
63 mem_usage ..... amount of allocated memory
66 2. explicit allocating, automatic deallocating
68 dump_alloc .... allocate a memory block in the dump area
69 dump_realloc .. change size of a memory block (position may change)
70 dump_size ..... marks the current top of dump
71 dump_release .. free all memory requested after the mark
74 There are some useful macros:
76 NEW (type) ....... allocate memory for an element of type `type`
77 FREE (ptr,type) .. free memory
79 MNEW (type,num) .. allocate memory for an array
80 MFREE (ptr,type,num) .. free memory
82 MREALLOC (ptr,type,num1,num2) .. enlarge the array to size num2
84 These macros do the same except they operate on the dump area:
86 DNEW, DMNEW, DMREALLOC (there is no DFREE)
89 -------------------------------------------------------------------------------
93 ALIGN (pos, size) ... make pos divisible by size. always returns an
97 OFFSET (s,el) ....... returns the offset of 'el' in structure 's' in bytes.
99 MCOPY (dest,src,type,num) ... copy 'num' elements of type 'type'.
105 #define DUMPBLOCKSIZE 2 << 13 /* 2 * 8192 bytes */
109 /* dumpblock ******************************************************************/
118 /* dumpinfo *******************************************************************/
121 dumpblock *currentdumpblock;
122 s4 allocateddumpsize;
127 #define ALIGN(pos,size) ((((pos) + (size) - 1) / (size)) * (size))
128 #define PADDING(pos,size) (ALIGN((pos),(size)) - (pos))
129 #define OFFSET(s,el) ((int) ((size_t) & (((s*) 0)->el)))
131 #if !defined(DISABLE_GC)
133 #define NEW(type) ((type *) mem_alloc(sizeof(type)))
134 #define FREE(ptr,type) mem_free((ptr), sizeof(type))
136 #define MNEW(type,num) ((type *) mem_alloc(sizeof(type) * (num)))
137 #define MFREE(ptr,type,num) mem_free((ptr), sizeof(type) * (num))
139 #define MREALLOC(ptr,type,num1,num2) mem_realloc((ptr), sizeof(type) * (num1), \
140 sizeof(type) * (num2))
144 #define NEW(type) GCNEW(type,1)
145 #define FREE(ptr,type) GCFREE(ptr)
147 #define MNEW(type,num) GCNEW(type,num)
148 #define MFREE(ptr,type,num) GCFREE(ptr)
150 #define MREALLOC(ptr,type,num1,num2) nogc_realloc((ptr), sizeof(type) * (num1), \
151 sizeof(type) * (num2))
155 #define DNEW(type) ((type *) dump_alloc(sizeof(type)))
156 #define DMNEW(type,num) ((type *) dump_alloc(sizeof(type) * (num)))
157 #define DMREALLOC(ptr,type,num1,num2) dump_realloc((ptr), sizeof(type) * (num1), \
158 sizeof(type) * (num2))
160 #define MCOPY(dest,src,type,num) memcpy((dest), (src), sizeof(type) * (num))
161 #define MSET(ptr,byte,type,num) memset((ptr), (byte), sizeof(type) * (num))
162 #define MMOVE(dest,src,type,num) memmove((dest), (src), sizeof(type) * (num))
164 #define CNEW(type,num) ((type *) memory_cnew(sizeof(type) * (num)))
165 #define CFREE(ptr,num) MFREE(ptr,u1,num)
168 /* GC macros ******************************************************************/
170 /* Uncollectable memory which can contain references */
172 #define GCNEW_UNCOLLECTABLE(type,num) ((type *) heap_alloc_uncollectable(sizeof(type) * (num)))
174 #define GCNEW(type,num) heap_allocate(sizeof(type) * (num), true, NULL)
175 #define GCFREE(ptr) heap_free((ptr))
178 /* function prototypes ********************************************************/
180 /* initializes the memory subsystem */
181 bool memory_init(void);
183 void *memory_cnew(s4 size);
185 void *mem_alloc(s4 size);
186 void mem_free(void *m, s4 size);
187 void *mem_realloc(void *src, s4 len1, s4 len2);
189 void *dump_alloc(s4 size);
190 void *dump_realloc(void *src, s4 len1, s4 len2);
192 void dump_release(s4 size);
194 #endif /* _MEMORY_H */
198 * These are local overrides for various environment variables in Emacs.
199 * Please do not remove this and leave it at the end of the file, where
200 * Emacs will automagically detect them.
201 * ---------------------------------------------------------------------
204 * indent-tabs-mode: t