blob: 948162d104808443bbf8bce41986267a4fc69fde [file] [log] [blame]
/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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.
*/
#ifndef ANDROIDFW_ERRORS_H_
#define ANDROIDFW_ERRORS_H_
#include <optional>
#include <variant>
#include <android-base/result.h>
namespace android {
enum class IOError {
// Used when reading a file residing on an IncFs file-system times out.
PAGES_MISSING = -1,
};
// Represents an absent result or an I/O error.
using NullOrIOError = std::variant<std::nullopt_t, IOError>;
// Checks whether the result holds an unexpected I/O error.
template <typename T>
static inline bool IsIOError(const base::expected<T, NullOrIOError> result) {
return !result.has_value() && std::holds_alternative<IOError>(result.error());
}
static inline IOError GetIOError(const NullOrIOError& error) {
return std::get<IOError>(error);
}
} // namespace android
#endif //ANDROIDFW_ERRORS_H_