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/*
* Logger.cpp
*
* Created on: 17 Sep 2017
* Author: David
*/
#include "RepRapFirmware.h"
#include "Logger.h"
#include "OutputMemory.h"
#include "RepRap.h"
#include "Platform.h"
// Simple lock class that sets a variable true when it is created and makes sure it gets set false when it falls out of scope
class Lock
{
public:
Lock(bool& pb) : b(pb) { b = true; }
~Lock() { b = false; }
private:
bool& b;
};
Logger::Logger() : logFile(), lastFlushTime(0), lastFlushFileSize(0), dirty(false), inLogger(false)
{
}
void Logger::Start(time_t time, const StringRef& filename)
{
if (!inLogger)
{
Lock loggerLock(inLogger);
FileStore * const f = reprap.GetPlatform().OpenFile(SYS_DIR, filename.c_str(), OpenMode::append);
if (f != nullptr)
{
logFile.Set(f);
lastFlushFileSize = logFile.Length();
logFile.Seek(lastFlushFileSize);
InternalLogMessage(time, "Event logging started\n");
}
}
}
void Logger::Stop(time_t time)
{
if (logFile.IsLive() && !inLogger)
{
Lock loggerLock(inLogger);
InternalLogMessage(time, "Event logging stopped\n");
logFile.Close();
}
}
void Logger::LogMessage(time_t time, const char *message)
{
if (logFile.IsLive() && !inLogger)
{
Lock loggerLock(inLogger);
InternalLogMessage(time, message);
}
}
void Logger::LogMessage(time_t time, OutputBuffer *buf)
{
if (logFile.IsLive() && !inLogger)
{
Lock loggerLock(inLogger);
bool ok = WriteDateTime(time);
if (ok)
{
ok = buf->WriteToFile(logFile);
}
if (ok)
{
dirty = true;
}
else
{
logFile.Close();
}
}
}
// Version of LogMessage for when we already know we want to proceed and we have already set inLogger
void Logger::InternalLogMessage(time_t time, const char *message)
{
bool ok = WriteDateTime(time);
if (ok)
{
const size_t len = strlen(message);
if (len != 0)
{
ok = logFile.Write(message, len);
}
if (ok && (len == 0 || message[len - 1] != '\n'))
{
ok = logFile.Write('\n');
}
}
if (ok)
{
dirty = true;
}
else
{
logFile.Close();
}
}
// This is called regularly by Platform to give the logger an opportunity to flush the file buffer
void Logger::Flush(bool forced)
{
if (logFile.IsLive() && dirty && !inLogger)
{
// Log file is dirty and can be flushed.
// To avoid excessive disk write operations, flush it only if one of the following is true:
// 1. We have possibly allocated a new cluster since the last flush. To avoid lost clusters if we power down before flushing,
// we should flush early in this case. Rather than determine the cluster size, we flush if we have started a new 512-byte sector.
// 2. If it hasn't been flushed for LogFlushInterval milliseconds.
const FilePosition currentPos = logFile.GetPosition();
const uint32_t now = millis();
if (forced || now - lastFlushTime >= LogFlushInterval || currentPos/512 != lastFlushFileSize/512)
{
Lock loggerLock(inLogger);
logFile.Flush();
lastFlushTime = millis();
lastFlushFileSize = currentPos;
dirty = false;
}
}
}
// Write the data and time to the file followed by a space.
// Caller must already have checked and set inLogger.
bool Logger::WriteDateTime(time_t time)
{
String<30> bufferSpace;
const StringRef buf = bufferSpace.GetRef();
if (time == 0)
{
const uint32_t timeSincePowerUp = (uint32_t)(millis64()/1000u);
buf.printf("power up + %02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 " ", timeSincePowerUp/3600u, (timeSincePowerUp % 3600u)/60u, timeSincePowerUp % 60u);
}
else
{
const struct tm * const timeInfo = gmtime(&time);
buf.printf("%04u-%02u-%02u %02u:%02u:%02u ",
timeInfo->tm_year + 1900, timeInfo->tm_mon + 1, timeInfo->tm_mday, timeInfo->tm_hour, timeInfo->tm_min, timeInfo->tm_sec);
}
return logFile.Write(buf.c_str());
}
// End
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