98 lines
1.9 KiB
C++
98 lines
1.9 KiB
C++
/*
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* utility_asynclogger.hpp
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*
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* Created on: Apr 1, 2021
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* Author: erki
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*/
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#ifndef UTILITY_INC_UTILITY_ASYNCLOGGER_HPP_
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#define UTILITY_INC_UTILITY_ASYNCLOGGER_HPP_
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#include "utility_atomicscopeguard.hpp"
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#include "utility_ringbuffer.hpp"
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#include "utility_ilogger.hpp"
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#include <array>
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#include <cstdarg>
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#include <cstdio>
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namespace Utility
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{
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template<typename T, typename H, std::size_t BufferCount, std::size_t BufferSize>
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class AsyncLogger : public ILogger
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{
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public:
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using serial_interface = T;
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using hal = H;
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AsyncLogger() = delete;
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explicit AsyncLogger(const serial_interface& serial)
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: _serial(serial)
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{ }
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AsyncLogger(const AsyncLogger&) = delete;
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AsyncLogger(AsyncLogger&&) = delete;
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AsyncLogger& operator=(const AsyncLogger&) = delete;
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AsyncLogger& operator=(AsyncLogger&&) = delete;
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void log(const char* format, ...)
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{
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{
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AtomicScopeGuard<hal> s;
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if (_buffer_queue.size() == _buffer_queue.max_size())
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return;
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}
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std::va_list args;
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va_start(args, format);
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auto tail = _buffer_queue.end();
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std::array<char, 255>& buffer = tail->buffer;
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tail->length = vsnprintf(buffer.data(), buffer.size(), format, args);
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{
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AtomicScopeGuard<hal> s;
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_buffer_queue.increment_tail();
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if (!_in_flight)
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_sendNextLog();
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}
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}
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void txCompleteCallback()
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{
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if (!_buffer_queue.empty())
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_sendNextLog();
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else
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_in_flight = false;
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}
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private:
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struct _Data
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{
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std::array<char, BufferSize> buffer;
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std::int32_t length = 0;
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};
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Ringbuffer<_Data, BufferCount> _buffer_queue;
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serial_interface _serial;
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bool _in_flight = false;
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void _sendNextLog()
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{
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_in_flight = true;
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_Data& head = _buffer_queue.front();
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_serial.Transmit(reinterpret_cast<uint8_t*>(head.buffer.data()), head.length);
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_buffer_queue.pop_front();
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}
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};
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}
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#endif /* UTILITY_INC_UTILITY_ASYNCLOGGER_HPP_ */
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