common: compile libcommon as C++

[lttng-tools.git] / src / common / dynamic-array.cpp

diff --git a/src/common/dynamic-array.cpp b/src/common/dynamic-array.cpp
new file mode 100644 (file)
index 0000000..d723ffa
--- /dev/null
+++ b/src/common/dynamic-array.cpp
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/dynamic-array.h>
+
+void lttng_dynamic_array_init(struct lttng_dynamic_array *array,
+               size_t element_size,
+               lttng_dynamic_array_element_destructor destructor)
+{
+       lttng_dynamic_buffer_init(&array->buffer);
+       array->element_size = element_size;
+       array->size = 0;
+       array->destructor = destructor;
+}
+
+int lttng_dynamic_array_set_count(struct lttng_dynamic_array *array,
+               size_t new_element_count)
+{
+       int ret;
+
+       if (!array) {
+               ret = -1;
+               goto end;
+       }
+
+       if (array->destructor) {
+               size_t i;
+
+               for (i = new_element_count; i < array->size; i++) {
+                       void *element = lttng_dynamic_array_get_element(
+                                       array, i);
+
+                       array->destructor(element);
+               }
+       }
+
+       array->size = new_element_count;
+       ret = lttng_dynamic_buffer_set_size(&array->buffer,
+                       new_element_count * array->element_size);
+end:
+       return ret;
+}
+
+int lttng_dynamic_array_add_element(struct lttng_dynamic_array *array,
+               const void *element)
+{
+       int ret;
+
+       if (!array || !element) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = lttng_dynamic_buffer_append(&array->buffer, element,
+                       array->element_size);
+       if (ret) {
+               goto end;
+       }
+       array->size++;
+end:
+       return ret;
+}
+
+int lttng_dynamic_array_remove_element(struct lttng_dynamic_array *array,
+               size_t element_index)
+{
+       void *element = lttng_dynamic_array_get_element(array,
+                       element_index);
+
+       if (array->destructor) {
+               array->destructor(element);
+       }
+       if (element_index != lttng_dynamic_array_get_count(array) - 1) {
+               void *next_element = lttng_dynamic_array_get_element(array,
+                               element_index + 1);
+
+               memmove(element, next_element,
+                               (array->size - element_index - 1) * array->element_size);
+       }
+       array->size--;
+       return lttng_dynamic_buffer_set_size(&array->buffer,
+                       array->buffer.size - array->element_size);
+}
+
+void lttng_dynamic_array_reset(struct lttng_dynamic_array *array)
+{
+       if (array->destructor) {
+               size_t i;
+
+               for (i = 0; i < lttng_dynamic_array_get_count(array); i++) {
+                       array->destructor(lttng_dynamic_array_get_element(array,
+                                       i));
+               }
+       }
+
+       lttng_dynamic_buffer_reset(&array->buffer);
+       array->size = 0;
+}
+
+void lttng_dynamic_array_clear(struct lttng_dynamic_array *array)
+{
+       if (array->destructor) {
+               size_t i;
+
+               for (i = 0; i < lttng_dynamic_array_get_count(array); i++) {
+                       array->destructor(lttng_dynamic_array_get_element(array,
+                                       i));
+               }
+       }
+
+       (void) lttng_dynamic_buffer_set_size(&array->buffer, 0);
+       array->size = 0;
+}
+
+void lttng_dynamic_pointer_array_init(
+               struct lttng_dynamic_pointer_array *array,
+               lttng_dynamic_pointer_array_destructor destructor)
+{
+       lttng_dynamic_array_init(&array->array, sizeof(void *), destructor);
+}      
+
+int lttng_dynamic_pointer_array_remove_pointer(
+               struct lttng_dynamic_pointer_array *array, size_t index)
+{
+       int ret;
+       const lttng_dynamic_array_element_destructor destructor =
+                       array->array.destructor;
+
+       /*
+        * Prevent the destructor from being used by the underlying
+        * dynamic array.
+        */
+       array->array.destructor = NULL;
+       if (destructor) {
+               destructor(lttng_dynamic_pointer_array_get_pointer(array,
+                               index));
+       }
+       ret = lttng_dynamic_array_remove_element(&array->array, index);
+       array->array.destructor = destructor;
+       return ret;
+}
+
+/* Release any memory used by the dynamic array. */
+void lttng_dynamic_pointer_array_reset(
+               struct lttng_dynamic_pointer_array *array)
+{
+       if (array->array.destructor) {
+               size_t i, count = lttng_dynamic_pointer_array_get_count(array);
+
+               for (i = 0; i < count; i++) {
+                       void *ptr = lttng_dynamic_pointer_array_get_pointer(
+                                       array, i);
+                       array->array.destructor(ptr);
+               }
+               /*
+                * Prevent the destructor from being used by the underlying
+                * dynamic array.
+                */
+               array->array.destructor = NULL;
+       }
+       lttng_dynamic_array_reset(&array->array);
+}
+
+void lttng_dynamic_pointer_array_clear(
+               struct lttng_dynamic_pointer_array *array)
+{
+       const lttng_dynamic_array_element_destructor destructor =
+                       array->array.destructor;
+
+       /*
+        * Prevent the destructor from being used by the underlying
+        * dynamic array.
+        */
+       array->array.destructor = NULL;
+       if (destructor) {
+               size_t i, count = lttng_dynamic_pointer_array_get_count(array);
+
+               for (i = 0; i < count; i++) {
+                       void *ptr = lttng_dynamic_pointer_array_get_pointer(
+                                       array, i);
+                       destructor(ptr);
+               }
+       }
+       lttng_dynamic_array_clear(&array->array);
+       array->array.destructor = destructor;
+}