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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/allocator.h"
#include <algorithm>
#include <cstring>
#include "pw_assert/check.h"
#include "pw_bytes/alignment.h"
namespace pw::allocator {
void* Allocator::DoReallocate(void* ptr,
size_t old_size,
size_t old_alignment,
size_t new_size) {
if (new_size == 0) {
return nullptr;
}
if (DoResize(ptr, old_size, old_alignment, new_size)) {
return ptr;
}
void* new_ptr = DoAllocate(new_size, old_alignment);
if (new_ptr == nullptr) {
return nullptr;
}
if (ptr != nullptr && old_size != 0) {
std::memcpy(new_ptr, ptr, old_size);
DoDeallocate(ptr, old_size, old_alignment);
}
return new_ptr;
}
} // namespace pw::allocator
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