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1 | /* |
2 | * Copyright (C) 2013-2019 Free Software Foundation, Inc. | |
3 | * | |
4 | * This file is part of GNU lightning. | |
5 | * | |
6 | * GNU lightning is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU Lesser General Public License as published | |
8 | * by the Free Software Foundation; either version 3, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * GNU lightning is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
14 | * License for more details. | |
15 | * | |
16 | * Authors: | |
17 | * Paulo Cesar Pereira de Andrade | |
18 | */ | |
19 | ||
20 | #include <lightning.h> | |
21 | #include <lightning/jit_private.h> | |
519a9ea1 | 22 | #include <sys/mman.h> |
4a71579b PC |
23 | |
24 | /* | |
25 | * Prototypes | |
26 | */ | |
27 | static void *jit_default_alloc_func(size_t); | |
28 | static void *jit_default_realloc_func(void*, size_t); | |
29 | static void jit_default_free_func(void *); | |
30 | ||
31 | /* | |
32 | * Initialization | |
33 | */ | |
34 | static jit_alloc_func_ptr jit_alloc_ptr = jit_default_alloc_func; | |
35 | static jit_realloc_func_ptr jit_realloc_ptr = jit_default_realloc_func; | |
36 | static jit_free_func_ptr jit_free_ptr = jit_default_free_func; | |
37 | ||
38 | /* | |
39 | * Implementation | |
40 | */ | |
41 | jit_pointer_t | |
42 | jit_memcpy(jit_pointer_t dst, const void * src, jit_word_t size) | |
43 | { | |
44 | if (size) | |
45 | return (memcpy(dst, src, size)); | |
46 | return (dst); | |
47 | } | |
48 | ||
49 | jit_pointer_t | |
50 | jit_memmove(jit_pointer_t dst, const void *src , jit_word_t size) | |
51 | { | |
52 | if (size) | |
53 | return (memmove(dst, src, size)); | |
54 | return (dst); | |
55 | } | |
56 | ||
57 | void | |
58 | jit_set_memory_functions(jit_alloc_func_ptr alloc_ptr, | |
59 | jit_realloc_func_ptr realloc_ptr, | |
60 | jit_free_func_ptr free_ptr) | |
61 | { | |
62 | if (alloc_ptr == NULL) | |
63 | alloc_ptr = jit_default_alloc_func; | |
64 | if (realloc_ptr == NULL) | |
65 | realloc_ptr = jit_default_realloc_func; | |
66 | if (free_ptr == NULL) | |
67 | free_ptr = jit_default_free_func; | |
68 | jit_alloc_ptr = alloc_ptr; | |
69 | jit_realloc_ptr = realloc_ptr; | |
70 | jit_free_ptr = free_ptr; | |
71 | } | |
72 | ||
73 | void | |
74 | jit_get_memory_functions(jit_alloc_func_ptr *alloc_ptr, | |
75 | jit_realloc_func_ptr *realloc_ptr, | |
76 | jit_free_func_ptr *free_ptr) | |
77 | { | |
78 | *alloc_ptr = jit_alloc_ptr; | |
79 | *realloc_ptr = jit_realloc_ptr; | |
80 | *free_ptr = jit_free_ptr; | |
81 | } | |
82 | ||
83 | void | |
84 | jit_alloc(jit_pointer_t *ptr, jit_word_t size) | |
85 | { | |
86 | *ptr = (*jit_alloc_ptr)(size); | |
87 | memset(*ptr, 0, size); | |
88 | } | |
89 | ||
90 | void | |
91 | jit_realloc(jit_pointer_t *ptr, jit_word_t old_size, jit_word_t new_size) | |
92 | { | |
93 | *ptr = (*jit_realloc_ptr)(*ptr, new_size); | |
94 | if (old_size < new_size) | |
95 | memset((jit_int8_t*)*ptr + old_size, 0, new_size - old_size); | |
96 | } | |
97 | ||
98 | void | |
99 | jit_free(jit_pointer_t *ptr) | |
100 | { | |
101 | if (*ptr) { | |
102 | (*jit_free_ptr)(*ptr); | |
103 | *ptr = NULL; | |
104 | } | |
105 | } | |
106 | ||
107 | static void * | |
108 | jit_default_alloc_func(size_t size) | |
109 | { | |
110 | return (malloc(size)); | |
111 | } | |
112 | ||
113 | static void * | |
114 | jit_default_realloc_func(void *ptr, size_t size) | |
115 | { | |
116 | return (realloc(ptr, size)); | |
117 | } | |
118 | ||
119 | static void | |
120 | jit_default_free_func(void *ptr) | |
121 | { | |
122 | free(ptr); | |
123 | } |