src/allocator.c

Sat, 22 Jan 2022 10:29:48 +0100

author
Mike Becker <universe@uap-core.de>
date
Sat, 22 Jan 2022 10:29:48 +0100
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permissions
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hide __attribute__ from compilers that may not support it

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

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