1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
  
40
  
41
  
42
  
43
  
44
  
45
  
46
  
47
  
48
  
49
  
50
  
51
  
52
  
53
  
54
  
55
  
56
  
57
  
58
  
59
  
60
  
61
  
62
  
63
  
64
  
65
  
66
  
67
  
68
  
69
  
70
  
71
  
72
  
73
  
74
  
75
  
76
  
77
  
78
  
79
  
80
  
81
  
82
  
83
  
/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#ifndef MACROS_H 
#define MACROS_H 
 
#include "global.h" 
 
#ifdef HAVE_SYS_PARAM_H 
#include <sys/param.h> 
#endif 
 
#include "pike_memory.h" 
 
#define PTR_TO_INT(PTR) ((size_t) ((char *) (PTR) - (char *) NULL)) 
 
#if __GNUC__ >= 4 
#  define OFFSETOF(T,X) __builtin_offsetof(struct T,X) 
#  define ALIGNOF(X) __alignof__(X) 
#else 
#  define OFFSETOF(T, X) PTR_TO_INT(& (((struct T *)NULL)->X)) 
#  define ALIGNOF(X) OFFSETOF({ char ignored_; X fooo_;}, fooo_) 
#endif 
 
#define BASEOF(ptr, str_type, field) \ 
   ((struct str_type *)((char*)ptr - OFFSETOF(str_type, field))) 
 
#define NELEM(a) (sizeof (a) / sizeof ((a)[0])) 
#define ALLOC_STRUCT(X) ( (struct X *)xalloc(sizeof(struct X)) ) 
 
#define MINIMUM(X,Y) ((X)<(Y)?(X):(Y)) 
#define MAXIMUM(X,Y) ((X)>(Y)?(X):(Y)) 
 
#define DO_ALIGN(X,Y) (((size_t)(X)+((Y)-1)) & ~((Y)-1)) 
#define CONSTANT_STRLEN(X) (sizeof(X) - sizeof("")) 
 
#define SET_NEXT_AND_FREE(p,free_item) do{    \ 
  next=p->next;                                 \ 
  while(p->refs == 1 && (next=p->next))         \ 
  {                                             \ 
    add_ref(next);                              \ 
    free_item(p);                               \ 
    p=next;                                     \ 
  }                                             \ 
  free_item(p);                                 \ 
}while(0) 
 
#define DOUBLELINK(first_object, o) do {      \ 
  debug_malloc_touch(o);                        \ 
  o->next=first_object;                         \ 
  o->prev=0;                                    \ 
  if(first_object) first_object->prev=o;        \ 
  first_object=o;                               \ 
}while(0) 
 
#define DOUBLEUNLINK(first_object,o) do{      \ 
  debug_malloc_touch(o);                        \ 
  if(o->prev) {                                 \ 
    o->prev->next=o->next;                      \ 
  }else {                                       \ 
    DO_IF_DEBUG(                                \ 
      if(first_object != o) {                   \ 
        describe(o);                            \ 
        Pike_fatal("Linked in wrong list!\n");  \ 
      }                                         \ 
    )                                           \ 
    first_object=o->next;                       \ 
  }                                             \ 
                                                \ 
  if(o->next) o->next->prev=o->prev;            \ 
}while(0) 
 
/* Useful to get a literal comma in an argument to a macro. */ 
#define COMMA , 
 
/* Necessary to pass an empty argument to a macro for some preprocessors. */ 
#define NOTHING 
#endif