utils.h

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/*
 * 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.
 */
#pragma once
 
#include <json/json.h>
#include <optional>
 
#include "cuttlefish/common/libs/fs/shared_fd.h"
#include "cuttlefish/common/libs/utils/result.h"
#include "cuttlefish/host/commands/kernel_log_monitor/kernel_log_server.h"
 
namespace cuttlefish::monitor {
 
struct ReadEventResult {
  Event event;
  Json::Value metadata;
};
 
// TODO(schuffelen): Remove `std::optional` if `socket_vsock_proxy` doesn't need
// this distinction.
Result<std::optional<ReadEventResult>> ReadEvent(SharedFD fd);
 
// Writes a kernel log event to the fd, in a format expected by ReadEvent.
bool WriteEvent(SharedFD fd, const Json::Value& event_message);
 
}  // namespace cuttlefish::monitor