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