/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * 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
 *
 *     http://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 "fud_allocator.hpp"

namespace fud {

Result<std::byte*, FudStatus> FudAllocator::allocate(size_t bytes, size_t alignment)
{
    using RetType = Result<std::byte*, FudStatus>;
    static_cast<void>(alignment);
    auto* pointer = fudAlloc(bytes);
    if (pointer == nullptr) {
        return RetType::error(FudStatus::AllocFailure);
    }
    return RetType::okay(pointer);
}

void FudAllocator::deallocate(std::byte* pointer, size_t bytes)
{
    if (pointer == nullptr || bytes == 0) {
        return;
    }
    fudFree(pointer);
}

bool FudAllocator::isEqual(const Allocator& rhs) const
{
    return &rhs == static_cast<const Allocator*>(this);
}

FudAllocator globalFudAllocator{};

Result<std::byte*, FudStatus> NullAllocator::allocate(size_t bytes, size_t alignment)
{
    static_cast<void>(bytes);
    static_cast<void>(alignment);
    return FudError{FudStatus::AllocFailure};
}

void NullAllocator::deallocate(std::byte* pointer, size_t bytes)
{
    static_cast<void>(pointer);
    static_cast<void>(bytes);
}

bool NullAllocator::isEqual(const Allocator& rhs) const
{
    return &rhs == static_cast<const Allocator*>(this);
}

NullAllocator globalNullAllocator{};

} // namespace fud