3 template <typename Array> cell array_capacity(const Array* array) {
4 FACTOR_ASSERT(array->type() == Array::type_number);
5 return array->capacity >> TAG_BITS;
8 template <typename Array> cell array_size(cell capacity) {
9 return sizeof(Array) + capacity * Array::element_size;
12 template <typename Array> cell array_size(Array* array) {
13 return array_size<Array>(array_capacity(array));
17 template <typename Array>
18 Array* factor_vm::allot_uninitialized_array(cell capacity) {
19 Array* array = allot<Array>(array_size<Array>(capacity));
20 array->capacity = tag_fixnum(capacity);
24 template <typename Array>
25 bool factor_vm::reallot_array_in_place_p(Array* array, cell capacity) {
26 return data->nursery->contains_p(array) &&
27 capacity <= array_capacity(array);
30 // Allocates memory (sometimes)
31 template <typename Array>
32 Array* factor_vm::reallot_array(Array* array_, cell capacity) {
33 data_root<Array> array(array_, this);
35 if (array_capacity(array.untagged()) == capacity)
36 return array.untagged();
38 if (reallot_array_in_place_p(array.untagged(), capacity)) {
39 array->capacity = tag_fixnum(capacity);
40 return array.untagged();
42 cell to_copy = array_capacity(array.untagged());
43 if (capacity < to_copy)
46 Array* new_array = allot_uninitialized_array<Array>(capacity);
48 memcpy(new_array + 1, array.untagged() + 1, to_copy * Array::element_size);
49 memset((char*)(new_array + 1) + to_copy * Array::element_size, 0,
50 (capacity - to_copy) * Array::element_size);