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88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
4 years ago
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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSLOG_LOG_CHANNEL_H
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#define SRSLOG_LOG_CHANNEL_H
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#include "srslte/srslog/detail/log_backend.h"
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#include "srslte/srslog/detail/support/thread_utils.h"
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namespace srslog {
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/// A log channel is the entity used for logging messages.
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///
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/// It can deliver a log entry to one or more different sinks, for example a
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/// file or a console.
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/// Generated log entries by the application will be ignored by the channel when
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/// set to disabled.
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/// NOTE: Thread safe class.
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class log_channel
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{
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public:
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log_channel(std::string id, sink& s, detail::log_backend& backend) :
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log_id(std::move(id)),
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log_sink(s),
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backend(backend),
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is_enabled(true)
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{}
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log_channel(const log_channel& other) = delete;
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log_channel& operator=(const log_channel& other) = delete;
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/// Controls when the channel accepts incoming log entries.
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void set_enabled(bool enabled) { is_enabled = enabled; }
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/// Returns true if the channel is accepting incoming log entries, otherwise
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/// false.
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bool enabled() const { return is_enabled; }
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/// Returns the id string of the channel.
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const std::string& id() const { return log_id; }
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/// Builds the provided log entry and passes it to the backend. When the
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/// channel is disabled the log entry will be discarded.
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template <typename... Args>
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void operator()(const std::string& fmtstr, Args&&... args)
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{
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if (!enabled()) {
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return;
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}
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// Populate the store with all incoming arguments.
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fmt::dynamic_format_arg_store<fmt::printf_context> store;
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(void)std::initializer_list<int>{(store.push_back(args), 0)...};
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// Send the log entry to the backend.
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detail::log_entry entry = {&log_sink, fmtstr, std::move(store)};
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backend.push(std::move(entry));
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}
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private:
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const std::string log_id;
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sink& log_sink;
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detail::log_backend& backend;
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detail::shared_variable<bool> is_enabled;
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};
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} // namespace srslog
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#endif // SRSLOG_LOG_CHANNEL_H
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