| // Copyright 2023 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| #include "pw_allocator/allocator.h" |
| |
| #include <algorithm> |
| #include <cstring> |
| |
| #include "pw_assert/check.h" |
| #include "pw_bytes/alignment.h" |
| |
| namespace pw::allocator { |
| |
| void* Allocator::DoReallocate(void* ptr, Layout layout, size_t new_size) { |
| if (new_size == 0) { |
| return nullptr; |
| } |
| if (Resize(ptr, layout, new_size)) { |
| return ptr; |
| } |
| void* new_ptr = DoAllocate(Layout(new_size, layout.alignment())); |
| if (new_ptr == nullptr) { |
| return nullptr; |
| } |
| if (ptr != nullptr && layout.size() != 0) { |
| std::memcpy(new_ptr, ptr, layout.size()); |
| DoDeallocate(ptr, layout); |
| } |
| return new_ptr; |
| } |
| |
| } // namespace pw::allocator |