1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #include "pw_allocator/bump_allocator.h" 16 17 #include "pw_allocator/buffer.h" 18 #include "pw_bytes/alignment.h" 19 20 namespace pw::allocator { 21 Init(ByteSpan region)22void BumpAllocator::Init(ByteSpan region) { 23 Reset(); 24 remaining_ = region; 25 } 26 DoAllocate(Layout layout)27void* BumpAllocator::DoAllocate(Layout layout) { 28 ByteSpan region = GetAlignedSubspan(remaining_, layout.alignment()); 29 if (region.size() < layout.size()) { 30 return nullptr; 31 } 32 remaining_ = region.subspan(layout.size()); 33 return region.data(); 34 } 35 DoDeallocate(void *)36void BumpAllocator::DoDeallocate(void*) {} 37 Reset()38void BumpAllocator::Reset() { 39 if (owned_ != nullptr) { 40 owned_->Destroy(); 41 } 42 remaining_ = ByteSpan(); 43 } 44 45 } // namespace pw::allocator 46