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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_FUCHSIA_SCOPED_FX_LOGGER_H_
#define BASE_FUCHSIA_SCOPED_FX_LOGGER_H_
#include <fidl/fuchsia.logger/cpp/fidl.h>
#include <lib/syslog/structured_backend/cpp/fuchsia_syslog.h>
#include <lib/zx/socket.h>
#include <stdint.h>
#include <string>
#include <string_view>
#include <vector>
#include "base/base_export.h"
#include "base/logging.h"
namespace base {
// Emits log lines to a logger created via the specified LogSink.
// This class is thread-safe.
class BASE_EXPORT ScopedFxLogger {
public:
ScopedFxLogger();
~ScopedFxLogger();
ScopedFxLogger(ScopedFxLogger&& other);
ScopedFxLogger& operator=(ScopedFxLogger&& other);
// Returns an instance connected to the process' incoming LogSink service.
// The returned instance has a single tag attributing the calling process in
// some way (e.g. by Component or process name).
// Additional tags may optionally be specified via `tags`.
static ScopedFxLogger CreateForProcess(
std::vector<std::string_view> tags = {});
// Returns an instance connected to the specified LogSink.
static ScopedFxLogger CreateFromLogSink(
fidl::ClientEnd<fuchsia_logger::LogSink> client_end,
std::vector<std::string_view> tags = {});
void LogMessage(std::string_view file,
uint32_t line_number,
std::string_view msg,
logging::LogSeverity severity);
bool is_valid() const { return socket_.is_valid(); }
private:
ScopedFxLogger(std::vector<std::string_view> tags, zx::socket socket);
// For thread-safety these members should be treated as read-only.
// They are non-const only to allow move-assignment of ScopedFxLogger.
std::vector<std::string> tags_;
zx::socket socket_;
};
} // namespace base
#endif // BASE_FUCHSIA_SCOPED_FX_LOGGER_H_
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