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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*-------------------------------------------------------------------------
*
* fe_memutils.c
* memory management support for frontend code
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/common/fe_memutils.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#error "This file is not expected to be compiled for backend code"
#endif
#include "postgres_fe.h"
static inline void *
pg_malloc_internal(size_t size, int flags)
{
void *tmp;
/* Avoid unportable behavior of malloc(0) */
if (size == 0)
size = 1;
tmp = malloc(size);
if (tmp == NULL)
{
if ((flags & MCXT_ALLOC_NO_OOM) == 0)
{
fprintf(stderr, _("out of memory\n"));
exit(EXIT_FAILURE);
}
return NULL;
}
if ((flags & MCXT_ALLOC_ZERO) != 0)
MemSet(tmp, 0, size);
return tmp;
}
void *
pg_malloc(size_t size)
{
return pg_malloc_internal(size, 0);
}
void *
pg_malloc0(size_t size)
{
return pg_malloc_internal(size, MCXT_ALLOC_ZERO);
}
void *
pg_malloc_extended(size_t size, int flags)
{
return pg_malloc_internal(size, flags);
}
void *
pg_realloc(void *ptr, size_t size)
{
void *tmp;
/* Avoid unportable behavior of realloc(NULL, 0) */
if (ptr == NULL && size == 0)
size = 1;
tmp = realloc(ptr, size);
if (!tmp)
{
fprintf(stderr, _("out of memory\n"));
exit(EXIT_FAILURE);
}
return tmp;
}
/*
* "Safe" wrapper around strdup().
*/
char *
pg_strdup(const char *in)
{
char *tmp;
if (!in)
{
fprintf(stderr,
_("cannot duplicate null pointer (internal error)\n"));
exit(EXIT_FAILURE);
}
tmp = strdup(in);
if (!tmp)
{
fprintf(stderr, _("out of memory\n"));
exit(EXIT_FAILURE);
}
return tmp;
}
void
pg_free(void *ptr)
{
free(ptr);
}
/*
* Frontend emulation of backend memory management functions. Useful for
* programs that compile backend files.
*/
void *
palloc(Size size)
{
return pg_malloc_internal(size, 0);
}
void *
palloc0(Size size)
{
return pg_malloc_internal(size, MCXT_ALLOC_ZERO);
}
void *
palloc_extended(Size size, int flags)
{
return pg_malloc_internal(size, flags);
}
void
pfree(void *pointer)
{
pg_free(pointer);
}
char *
pstrdup(const char *in)
{
return pg_strdup(in);
}
char *
pnstrdup(const char *in, Size size)
{
char *tmp;
int len;
if (!in)
{
fprintf(stderr,
_("cannot duplicate null pointer (internal error)\n"));
exit(EXIT_FAILURE);
}
len = strnlen(in, size);
tmp = malloc(len + 1);
if (tmp == NULL)
{
fprintf(stderr, _("out of memory\n"));
exit(EXIT_FAILURE);
}
memcpy(tmp, in, len);
tmp[len] = '\0';
return tmp;
}
void *
repalloc(void *pointer, Size size)
{
return pg_realloc(pointer, size);
}
|
