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// 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/fallback_allocator.h"
#include "pw_assert/check.h"
namespace pw::allocator {
void FallbackAllocator::Initialize(Allocator& primary, Allocator& secondary) {
primary_ = &primary;
secondary_ = &secondary;
}
Status FallbackAllocator::DoQuery(const void* ptr,
size_t size,
size_t alignment) const {
PW_DCHECK(primary_ != nullptr && secondary_ != nullptr);
auto status = primary_->QueryUnchecked(ptr, size, alignment);
return status.ok() ? status
: secondary_->QueryUnchecked(ptr, size, alignment);
}
void* FallbackAllocator::DoAllocate(size_t size, size_t alignment) {
PW_DCHECK(primary_ != nullptr && secondary_ != nullptr);
void* ptr = primary_->AllocateUnchecked(size, alignment);
return ptr != nullptr ? ptr : secondary_->AllocateUnchecked(size, alignment);
}
void FallbackAllocator::DoDeallocate(void* ptr, size_t size, size_t alignment) {
PW_DCHECK(primary_ != nullptr && secondary_ != nullptr);
if (primary_->QueryUnchecked(ptr, size, alignment).ok()) {
primary_->DeallocateUnchecked(ptr, size, alignment);
} else {
secondary_->DeallocateUnchecked(ptr, size, alignment);
}
}
bool FallbackAllocator::DoResize(void* ptr,
size_t old_size,
size_t old_alignment,
size_t new_size) {
PW_DCHECK(primary_ != nullptr && secondary_ != nullptr);
return primary_->QueryUnchecked(ptr, old_size, old_alignment).ok()
? primary_->ResizeUnchecked(ptr, old_size, old_alignment, new_size)
: secondary_->ResizeUnchecked(
ptr, old_size, old_alignment, new_size);
}
} // namespace pw::allocator
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