1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "cx/allocator.h"
30
31 __attribute__((__malloc__, __alloc_size__(2)))
32 static void *cx_malloc_stdlib(
33 __attribute__((__unused__)) void *d,
34 size_t n
35 ) {
36 return malloc(n);
37 }
38
39 __attribute__((__warn_unused_result__, __alloc_size__(3)))
40 static void *cx_realloc_stdlib(
41 __attribute__((__unused__)) void *d,
42 void *mem,
43 size_t n
44 ) {
45 return realloc(mem, n);
46 }
47
48 __attribute__((__malloc__, __alloc_size__(2, 3)))
49 static void *cx_calloc_stdlib(
50 __attribute__((__unused__)) void *d,
51 size_t nelem,
52 size_t n
53 ) {
54 return calloc(nelem, n);
55 }
56
57 __attribute__((__nonnull__))
58 static void cx_free_stdlib(
59 __attribute__((__unused__)) void *d,
60 void *mem
61 ) {
62 free(mem);
63 }
64
65 static cx_allocator_class cx_default_allocator_class = {
66 cx_malloc_stdlib,
67 cx_realloc_stdlib,
68 cx_calloc_stdlib,
69 cx_free_stdlib
70 };
71
72 struct cx_allocator_s cx_default_allocator = {
73 &cx_default_allocator_class,
74 NULL
75 };
76 CxAllocator *cxDefaultAllocator = &cx_default_allocator;
77
78 // IMPLEMENTATION OF HIGH LEVEL API
79
80 void *cxMalloc(
81 CxAllocator const *allocator,
82 size_t n
83 ) {
84 return allocator->cl->malloc(allocator->data, n);
85 }
86
87 void *cxRealloc(
88 CxAllocator const *allocator,
89 void *mem,
90 size_t n
91 ) {
92 return allocator->cl->realloc(allocator->data, mem, n);
93 }
94
95 int cxReallocate(
96 CxAllocator const *allocator,
97 void **mem,
98 size_t n
99 ) {
100 void *nmem = allocator->cl->realloc(allocator->data, *mem, n);
101 if (nmem == NULL) {
102 return 1;
103 } else {
104 *mem = nmem;
105 return 0;
106 }
107 }
108
109 void *cxCalloc(
110 CxAllocator const *allocator,
111 size_t nelem,
112 size_t n
113 ) {
114 return allocator->cl->calloc(allocator->data, nelem, n);
115 }
116
117 void cxFree(
118 CxAllocator const *allocator,
119 void *mem
120 ) {
121 allocator->cl->free(allocator->data, mem);
122 }
123