1 /************************* toolbox/memory.h ************************************
3 Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
5 See file COPYRIGHT for information on usage and disclaimer of warranties
7 Macros for memory management
9 Authors: Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
11 Last Change: 1996/10/03
13 *******************************************************************************/
17 #define ALIGN(pos,size) ( ( ((pos)+(size)-1) / (size))*(size) )
18 #define PADDING(pos,size) ( ALIGN((pos),(size)) - (pos) )
19 #define OFFSET(s,el) ( (int) ( (size_t) &( ((s*)0) -> el ) ) )
22 #define NEW(type) ((type*) mem_alloc ( sizeof(type) ))
23 #define FREE(ptr,type) mem_free (ptr, sizeof(type) )
25 #define LNEW(type) ((type*) lit_mem_alloc ( sizeof(type) ))
26 #define LFREE(ptr,type) lit_mem_free (ptr, sizeof(type) )
28 #define MNEW(type,num) ((type*) mem_alloc ( sizeof(type) * (num) ))
29 #define MFREE(ptr,type,num) mem_free (ptr, sizeof(type) * (num) )
30 #define MREALLOC(ptr,type,num1,num2) mem_realloc (ptr, sizeof(type) * (num1), \
31 sizeof(type) * (num2) )
33 #define DNEW(type) ((type*) mem_alloc ( sizeof(type) ))
34 #define DMNEW(type,num) ((type*) mem_alloc ( sizeof(type) * (num) ))
35 #define DMREALLOC(ptr,type,num1,num2) mem_realloc (ptr, sizeof(type)*(num1),\
36 sizeof(type) * (num2) )
38 #define MCOPY(dest,src,type,num) memcpy (dest,src, sizeof(type)* (num) )
41 #define CNEW(type,num) ((type*) mem_mmap ( sizeof(type) * (num) ))
42 #define CFREE(ptr,num)
44 #define CNEW(type,num) ((type*) mem_alloc ( sizeof(type) * (num) ))
45 #define CFREE(ptr,num) mem_free (ptr, num)
48 void *mem_alloc(int length);
49 void *mem_mmap(int length);
50 void *lit_mem_alloc(int length);
51 void mem_free(void *m, int length);
52 void lit_mem_free(void *m, int length);
53 void *mem_realloc(void *m, int len1, int len2);
56 void *dump_alloc(int length);
57 void *dump_realloc(void *m, int len1, int len2);
59 void dump_release(long int size);
61 void mem_usagelog(int givewarnings);
66 ---------------------------- Interface description -----------------------
68 There are two possible choices for allocating memory:
70 1. explicit allocating / deallocating
72 mem_alloc ..... allocate a memory block
73 mem_free ...... free a memory block
74 mem_realloc ... change size of a memory block (position may change)
75 mem_usage ..... amount of allocated memory
78 2. explicit allocating, automatic deallocating
80 dump_alloc .... allocate a memory block in the dump area
81 dump_realloc .. change size of a memory block (position may change)
82 dump_size ..... marks the current top of dump
83 dump_release .. free all memory requested after the mark
86 There are some useful macros:
88 NEW (type) ....... allocate memory for an element of type `type`
89 FREE (ptr,type) .. free memory
91 MNEW (type,num) .. allocate memory for an array
92 MFREE (ptr,type,num) .. free memory
94 MREALLOC (ptr,type,num1,num2) .. enlarge the array to size num2
96 These macros do the same except they operate on the dump area:
98 DNEW, DMNEW, DMREALLOC (there is no DFREE)
101 -------------------------------------------------------------------------------
105 ALIGN (pos, size) ... make pos divisible by size. always returns an
109 OFFSET (s,el) ....... returns the offset of 'el' in structure 's' in bytes.
111 MCOPY (dest,src,type,num) ... copy 'num' elements of type 'type'.