root / qemu-malloc.c @ 551a2dec
History | View | Annotate | Download (2.3 kB)
1 |
/*
|
---|---|
2 |
* malloc-like functions for system emulation.
|
3 |
*
|
4 |
* Copyright (c) 2006 Fabrice Bellard
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include "qemu-common.h" |
25 |
#include <stdlib.h> |
26 |
|
27 |
static void *oom_check(void *ptr) |
28 |
{ |
29 |
if (ptr == NULL) { |
30 |
abort(); |
31 |
} |
32 |
return ptr;
|
33 |
} |
34 |
|
35 |
void *get_mmap_addr(unsigned long size) |
36 |
{ |
37 |
return NULL; |
38 |
} |
39 |
|
40 |
void qemu_free(void *ptr) |
41 |
{ |
42 |
free(ptr); |
43 |
} |
44 |
|
45 |
static int allow_zero_malloc(void) |
46 |
{ |
47 |
#if defined(CONFIG_ZERO_MALLOC)
|
48 |
return 1; |
49 |
#else
|
50 |
return 0; |
51 |
#endif
|
52 |
} |
53 |
|
54 |
void *qemu_malloc(size_t size)
|
55 |
{ |
56 |
if (!size && !allow_zero_malloc()) {
|
57 |
abort(); |
58 |
} |
59 |
return oom_check(malloc(size ? size : 1)); |
60 |
} |
61 |
|
62 |
void *qemu_realloc(void *ptr, size_t size) |
63 |
{ |
64 |
if (!size && !allow_zero_malloc()) {
|
65 |
abort(); |
66 |
} |
67 |
return oom_check(realloc(ptr, size ? size : 1)); |
68 |
} |
69 |
|
70 |
void *qemu_mallocz(size_t size)
|
71 |
{ |
72 |
void *ptr;
|
73 |
ptr = qemu_malloc(size); |
74 |
memset(ptr, 0, size);
|
75 |
return ptr;
|
76 |
} |
77 |
|
78 |
char *qemu_strdup(const char *str) |
79 |
{ |
80 |
char *ptr;
|
81 |
size_t len = strlen(str); |
82 |
ptr = qemu_malloc(len + 1);
|
83 |
memcpy(ptr, str, len + 1);
|
84 |
return ptr;
|
85 |
} |
86 |
|
87 |
char *qemu_strndup(const char *str, size_t size) |
88 |
{ |
89 |
const char *end = memchr(str, 0, size); |
90 |
char *new;
|
91 |
|
92 |
if (end) {
|
93 |
size = end - str; |
94 |
} |
95 |
|
96 |
new = qemu_malloc(size + 1);
|
97 |
new[size] = 0;
|
98 |
|
99 |
return memcpy(new, str, size);
|
100 |
} |