| 1 | /* |
| 2 | * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <common/dynamic-array.h> |
| 9 | |
| 10 | LTTNG_HIDDEN |
| 11 | void lttng_dynamic_array_init(struct lttng_dynamic_array *array, |
| 12 | size_t element_size, |
| 13 | lttng_dynamic_array_element_destructor destructor) |
| 14 | { |
| 15 | lttng_dynamic_buffer_init(&array->buffer); |
| 16 | array->element_size = element_size; |
| 17 | array->size = 0; |
| 18 | array->destructor = destructor; |
| 19 | } |
| 20 | |
| 21 | LTTNG_HIDDEN |
| 22 | int lttng_dynamic_array_set_count(struct lttng_dynamic_array *array, |
| 23 | size_t new_element_count) |
| 24 | { |
| 25 | int ret; |
| 26 | |
| 27 | if (!array) { |
| 28 | ret = -1; |
| 29 | goto end; |
| 30 | } |
| 31 | |
| 32 | if (array->destructor) { |
| 33 | size_t i; |
| 34 | |
| 35 | for (i = new_element_count; i < array->size; i++) { |
| 36 | void *element = lttng_dynamic_array_get_element( |
| 37 | array, i); |
| 38 | |
| 39 | array->destructor(element); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | array->size = new_element_count; |
| 44 | ret = lttng_dynamic_buffer_set_size(&array->buffer, |
| 45 | new_element_count * array->element_size); |
| 46 | end: |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | LTTNG_HIDDEN |
| 51 | int lttng_dynamic_array_add_element(struct lttng_dynamic_array *array, |
| 52 | const void *element) |
| 53 | { |
| 54 | int ret; |
| 55 | |
| 56 | if (!array || !element) { |
| 57 | ret = -1; |
| 58 | goto end; |
| 59 | } |
| 60 | |
| 61 | ret = lttng_dynamic_buffer_append(&array->buffer, element, |
| 62 | array->element_size); |
| 63 | if (ret) { |
| 64 | goto end; |
| 65 | } |
| 66 | array->size++; |
| 67 | end: |
| 68 | return ret; |
| 69 | } |
| 70 | |
| 71 | LTTNG_HIDDEN |
| 72 | int lttng_dynamic_array_remove_element(struct lttng_dynamic_array *array, |
| 73 | size_t element_index) |
| 74 | { |
| 75 | void *element = lttng_dynamic_array_get_element(array, |
| 76 | element_index); |
| 77 | |
| 78 | if (array->destructor) { |
| 79 | array->destructor(element); |
| 80 | } |
| 81 | if (element_index != lttng_dynamic_array_get_count(array) - 1) { |
| 82 | void *next_element = lttng_dynamic_array_get_element(array, |
| 83 | element_index + 1); |
| 84 | |
| 85 | memmove(element, next_element, |
| 86 | (array->size - element_index - 1) * array->element_size); |
| 87 | } |
| 88 | array->size--; |
| 89 | return lttng_dynamic_buffer_set_size(&array->buffer, |
| 90 | array->buffer.size - array->element_size); |
| 91 | } |
| 92 | |
| 93 | LTTNG_HIDDEN |
| 94 | void lttng_dynamic_array_reset(struct lttng_dynamic_array *array) |
| 95 | { |
| 96 | if (array->destructor) { |
| 97 | size_t i; |
| 98 | |
| 99 | for (i = 0; i < lttng_dynamic_array_get_count(array); i++) { |
| 100 | array->destructor(lttng_dynamic_array_get_element(array, |
| 101 | i)); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | lttng_dynamic_buffer_reset(&array->buffer); |
| 106 | array->size = 0; |
| 107 | } |
| 108 | |
| 109 | LTTNG_HIDDEN |
| 110 | void lttng_dynamic_array_clear(struct lttng_dynamic_array *array) |
| 111 | { |
| 112 | if (array->destructor) { |
| 113 | size_t i; |
| 114 | |
| 115 | for (i = 0; i < lttng_dynamic_array_get_count(array); i++) { |
| 116 | array->destructor(lttng_dynamic_array_get_element(array, |
| 117 | i)); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | (void) lttng_dynamic_buffer_set_size(&array->buffer, 0); |
| 122 | array->size = 0; |
| 123 | } |
| 124 | |
| 125 | LTTNG_HIDDEN |
| 126 | void lttng_dynamic_pointer_array_init( |
| 127 | struct lttng_dynamic_pointer_array *array, |
| 128 | lttng_dynamic_pointer_array_destructor destructor) |
| 129 | { |
| 130 | lttng_dynamic_array_init(&array->array, sizeof(void *), destructor); |
| 131 | } |
| 132 | |
| 133 | LTTNG_HIDDEN |
| 134 | int lttng_dynamic_pointer_array_remove_pointer( |
| 135 | struct lttng_dynamic_pointer_array *array, size_t index) |
| 136 | { |
| 137 | int ret; |
| 138 | const lttng_dynamic_array_element_destructor destructor = |
| 139 | array->array.destructor; |
| 140 | |
| 141 | /* |
| 142 | * Prevent the destructor from being used by the underlying |
| 143 | * dynamic array. |
| 144 | */ |
| 145 | array->array.destructor = NULL; |
| 146 | if (destructor) { |
| 147 | destructor(lttng_dynamic_pointer_array_get_pointer(array, |
| 148 | index)); |
| 149 | } |
| 150 | ret = lttng_dynamic_array_remove_element(&array->array, index); |
| 151 | array->array.destructor = destructor; |
| 152 | return ret; |
| 153 | } |
| 154 | |
| 155 | /* Release any memory used by the dynamic array. */ |
| 156 | LTTNG_HIDDEN |
| 157 | void lttng_dynamic_pointer_array_reset( |
| 158 | struct lttng_dynamic_pointer_array *array) |
| 159 | { |
| 160 | if (array->array.destructor) { |
| 161 | size_t i, count = lttng_dynamic_pointer_array_get_count(array); |
| 162 | |
| 163 | for (i = 0; i < count; i++) { |
| 164 | void *ptr = lttng_dynamic_pointer_array_get_pointer( |
| 165 | array, i); |
| 166 | array->array.destructor(ptr); |
| 167 | } |
| 168 | /* |
| 169 | * Prevent the destructor from being used by the underlying |
| 170 | * dynamic array. |
| 171 | */ |
| 172 | array->array.destructor = NULL; |
| 173 | } |
| 174 | lttng_dynamic_array_reset(&array->array); |
| 175 | } |
| 176 | |
| 177 | LTTNG_HIDDEN |
| 178 | void lttng_dynamic_pointer_array_clear( |
| 179 | struct lttng_dynamic_pointer_array *array) |
| 180 | { |
| 181 | const lttng_dynamic_array_element_destructor destructor = |
| 182 | array->array.destructor; |
| 183 | |
| 184 | /* |
| 185 | * Prevent the destructor from being used by the underlying |
| 186 | * dynamic array. |
| 187 | */ |
| 188 | array->array.destructor = NULL; |
| 189 | if (destructor) { |
| 190 | size_t i, count = lttng_dynamic_pointer_array_get_count(array); |
| 191 | |
| 192 | for (i = 0; i < count; i++) { |
| 193 | void *ptr = lttng_dynamic_pointer_array_get_pointer( |
| 194 | array, i); |
| 195 | destructor(ptr); |
| 196 | } |
| 197 | } |
| 198 | lttng_dynamic_array_clear(&array->array); |
| 199 | array->array.destructor = destructor; |
| 200 | } |