-/*
- * sgen-array-list.c: A pointer array list that doesn't require reallocs
+/**
+ * \file
+ * A pointer array list that doesn't require reallocs
*
* Copyright (C) 2016 Xamarin Inc
*
}
}
+/*
+ * Extension for the array list that allows fast allocation and index based fetching
+ * of long lived memory of various sizes, without the need of realloc. Not thread safe.
+ */
+guint32
+sgen_array_list_alloc_block (SgenArrayList *array, guint32 slots_to_add)
+{
+ guint32 new_index = array->next_slot;
+ guint32 old_capacity = array->capacity;
+
+ /* FIXME Don't allocate arrays that will be skipped */
+ /* There are no empty arrays between next_slot and capacity because we allocate incrementally */
+ while ((old_capacity - new_index) < slots_to_add) {
+ sgen_array_list_grow (array, old_capacity);
+ new_index = old_capacity;
+ old_capacity = array->capacity;
+ }
+
+ SGEN_ASSERT (0, sgen_array_list_index_bucket (new_index) == sgen_array_list_index_bucket (new_index + slots_to_add - 1),
+ "We failed to allocate a continuous block of slots");
+
+ array->next_slot = new_index + slots_to_add;
+ /* The slot address will point to the allocated memory */
+ return new_index;
+}
+
guint32
sgen_array_list_add (SgenArrayList *array, gpointer ptr, int data, gboolean increase_size_before_set)
{
return index;
}
+/*
+ * Does a linear search through the pointer array to find `ptr`. Returns the index if
+ * found, otherwise (guint32)-1.
+ */
+guint32
+sgen_array_list_find (SgenArrayList *array, gpointer ptr)
+{
+ volatile gpointer *slot;
+
+ SGEN_ARRAY_LIST_FOREACH_SLOT (array, slot) {
+ if (*slot == ptr)
+ return __index;
+ } SGEN_ARRAY_LIST_END_FOREACH_SLOT;
+ return (guint32)-1;
+}
+
+gboolean
+sgen_array_list_default_cas_setter (volatile gpointer *slot, gpointer ptr, int data)
+{
+ if (InterlockedCompareExchangePointer (slot, ptr, NULL) == NULL)
+ return TRUE;
+ return FALSE;
+}
+
+gboolean
+sgen_array_list_default_is_slot_set (volatile gpointer *slot)
+{
+ return *slot != NULL;
+}
+
+/* Removes all NULL pointers from the array. Not thread safe */
+void
+sgen_array_list_remove_nulls (SgenArrayList *array)
+{
+ guint32 start = 0;
+ volatile gpointer *slot;
+ gboolean skipped = FALSE;
+
+ SGEN_ARRAY_LIST_FOREACH_SLOT (array, slot) {
+ if (*slot) {
+ *sgen_array_list_get_slot (array, start++) = *slot;
+ if (skipped)
+ *slot = NULL;
+ } else {
+ skipped = TRUE;
+ }
+ } SGEN_ARRAY_LIST_END_FOREACH_SLOT;
+
+ mono_memory_write_barrier ();
+ array->next_slot = start;
+ array->slot_hint = start;
+}
+
#endif