| // 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/bump_allocator.h" |
| |
| #include "pw_allocator/buffer.h" |
| #include "pw_bytes/alignment.h" |
| |
| namespace pw::allocator { |
| |
| void BumpAllocator::Init(ByteSpan region) { |
| Reset(); |
| remaining_ = region; |
| } |
| |
| void* BumpAllocator::DoAllocate(Layout layout) { |
| ByteSpan region = GetAlignedSubspan(remaining_, layout.alignment()); |
| if (region.size() < layout.size()) { |
| return nullptr; |
| } |
| remaining_ = region.subspan(layout.size()); |
| return region.data(); |
| } |
| |
| void BumpAllocator::DoDeallocate(void*) {} |
| |
| void BumpAllocator::Reset() { |
| if (owned_ != nullptr) { |
| owned_->Destroy(); |
| } |
| remaining_ = ByteSpan(); |
| } |
| |
| } // namespace pw::allocator |