path: root/Game/Code/Classes/ULog.pas

unit ULog;

interface

{$IFDEF FPC}
  {$MODE Delphi}
{$ENDIF}

{$I switches.inc}

uses
  Classes;

type
  TLog = class
  public
    BenchmarkTimeStart:   array[0..7] of real;
    BenchmarkTimeLength:  array[0..7] of real;//TDateTime;

    FileBenchmark:    TextFile;
    FileBenchmarkO:   boolean; // opened
    FileError:        TextFile;
    FileErrorO:       boolean; // opened

    Title: String; //Application Title

    //Should Log Files be written
    Enabled:          Boolean;

    constructor Create;

    // destuctor
    destructor Destroy; override;

    // benchmark
    procedure BenchmarkStart(Number: integer);
    procedure BenchmarkEnd(Number: integer);
    procedure LogBenchmark(Text: string; Number: integer);

    // error
    procedure LogError(Text: string); overload;

    //Critical Error (Halt + MessageBox)
    procedure CriticalError(Text: string);

    // voice
    procedure LogVoice(SoundNr: integer);

    // compability
    procedure LogStatus(Log1, Log2: string);
    procedure LogError(Log1, Log2: string); overload;
    procedure LogBuffer(const buf : Pointer; const bufLength : Integer; filename : string);
  end;

procedure SafeWriteLn(const msg: string); inline;

var
  Log:    TLog;

implementation

uses
  {$IFDEF win32}
  windows,
  {$ENDIF}
  SysUtils,
  DateUtils,
//UFiles,
  UMain,
  URecord,
  UTime,
//UIni,  // JB - Seems to not be needed.
  {$IFDEF FPC}
  sdl,
  {$ENDIF}
  UCommandLine;

{$IFDEF FPC}
var
  MessageList: TStringList;
  ConsoleHandler: TThreadID;
  ConsoleMutex: PSDL_Mutex;
  ConsoleCond: PSDL_Cond;
{$ENDIF}

{$IFDEF FPC}
{*
 * The console-handlers main-function.
 * TODO: create a quit-event on closing.
 *}
function ConsoleHandlerFunc(param: pointer): PtrInt;
var
  i: integer;
begin
  while true do
  begin
    SDL_mutexP(ConsoleMutex);
    while (MessageList.Count = 0) do
      SDL_CondWait(ConsoleCond, ConsoleMutex);
    for i := 0 to MessageList.Count-1 do
    begin
      WriteLn(MessageList[i]);
    end;
    MessageList.Clear();
    SDL_mutexV(ConsoleMutex);
  end;
  result := 0;
end;
{$ENDIF}

{*
 * With FPC console output is not thread-safe.
 * Using WriteLn() from external threads (like in SDL callbacks)
 *  will damage the heap and crash the program.
 * Most probably FPC uses thread-local-data (TLS) to lock a mutex on
 *  the console-buffer. This does not work with external lib's threads
 *  because these do not have the TLS data and so it crashes while
 *  accessing unallocated memory.
 * The solution is to create an FPC-managed thread which has the TLS data
 *  and use it to handle the console-output (hence it is called Console-Handler)
 * It should be safe to do so, but maybe FPC requires the main-thread to access
 *  the console-buffer only. In this case output should be delegated to it.
 *
 * TODO: - check if it is safe if an FPC-managed thread different than the
 *           main-thread accesses the console-buffer in FPC. 
 *       - check if Delphi's WriteLn is thread-safe.
 *       - check if we need to synchronize file-output too
 *       - Use TEvent and TCriticalSection instead of the SDL equivalents.
 *           Note: If those two objects use TLS they might crash FPC too.
 *}
procedure SafeWriteLn(const msg: string);
begin
{$IFDEF FPC}
  SDL_mutexP(ConsoleMutex);
  MessageList.Add(msg);
  SDL_CondSignal(ConsoleCond);
  SDL_mutexV(ConsoleMutex);
{$ELSE}
  WriteLn(msg);
{$ENDIF}
end;

constructor TLog.Create;
begin
{$IFDEF FPC}
  // TODO: check for the main-thread?
  //GetCurrentThreadThreadId();
  MessageList := TStringList.Create();
  ConsoleMutex := SDL_CreateMutex();
  ConsoleCond := SDL_CreateCond();
  ConsoleHandler := BeginThread(@ConsoleHandlerFunc);
{$ENDIF}
end;

destructor TLog.Destroy;
begin
  if FileBenchmarkO then CloseFile(FileBenchmark);
//  if FileAnalyzeO then CloseFile(FileAnalyze);
  if FileErrorO then CloseFile(FileError);
end;

procedure TLog.BenchmarkStart(Number: integer);
begin
  BenchmarkTimeStart[Number] := USTime.GetTime; //Time;
end;

procedure TLog.BenchmarkEnd(Number: integer);
begin
  BenchmarkTimeLength[Number] := USTime.GetTime {Time} - BenchmarkTimeStart[Number];
end;

procedure TLog.LogBenchmark(Text: string; Number: integer);
var
  Minutes:      integer;
  Seconds:      integer;
  Miliseconds:  integer;

  MinutesS:     string;
  SecondsS:     string;
  MilisecondsS: string;

  ValueText:    string;
begin
  if Enabled AND (Params.Benchmark) then begin
    if not FileBenchmarkO then begin
      FileBenchmarkO := true;
      AssignFile(FileBenchmark, LogPath + 'Benchmark.log');
      {$I-}
      Rewrite(FileBenchmark);
      if IOResult = 0 then FileBenchmarkO := true;
      {$I+}

      //If File is opened write Date to Benchmark File
      If (FileBenchmarkO) then
      begin
        WriteLn(FileBenchmark, Title + ' Benchmark File');
        WriteLn(FileBenchmark, 'Date: ' + DatetoStr(Now) + ' Time: ' + TimetoStr(Now));
        WriteLn(FileBenchmark, '-------------------');

        Flush(FileBenchmark);
      end;
    end;

  if FileBenchmarkO then begin
    Miliseconds := Trunc(Frac(BenchmarkTimeLength[Number]) * 1000);
    Seconds := Trunc(BenchmarkTimeLength[Number]) mod 60;
    Minutes := Trunc((BenchmarkTimeLength[Number] - Seconds) / 60);
//    ValueText := FloatToStr(BenchmarkTimeLength[Number]);

{    ValueText := FloatToStr(
      SecondOf(BenchmarkTimeLength[Number]) + MilliSecondOf(BenchmarkTimeLength[Number])/1000
      );
    if MinuteOf(BenchmarkTimeLength[Number]) >= 1 then
      ValueText := IntToStr(MinuteOf(BenchmarkTimeLength[Number])) + ':' + ValueText;
    WriteLn(FileBenchmark, Text + ': ' + ValueText + ' seconds');}

    if (Minutes = 0) and (Seconds = 0) then begin
      MilisecondsS := IntToStr(Miliseconds);
      ValueText := MilisecondsS + ' miliseconds';
    end;

    if (Minutes = 0) and (Seconds >= 1) then begin
      MilisecondsS := IntToStr(Miliseconds);
      while Length(MilisecondsS) < 3 do MilisecondsS := '0' + MilisecondsS;

      SecondsS := IntToStr(Seconds);

      ValueText := SecondsS + ',' + MilisecondsS + ' seconds';
    end;

    if Minutes >= 1 then begin
      MilisecondsS := IntToStr(Miliseconds);
      while Length(MilisecondsS) < 3 do MilisecondsS := '0' + MilisecondsS;

      SecondsS := IntToStr(Seconds);
      while Length(SecondsS) < 2 do SecondsS := '0' + SecondsS;

      MinutesS := IntToStr(Minutes);

      ValueText := MinutesS + ':' + SecondsS + ',' + MilisecondsS + ' minutes';
    end;

    WriteLn(FileBenchmark, Text + ': ' + ValueText);
    Flush(FileBenchmark);
    end;
  end;
end;

procedure TLog.LogError(Text: string);
begin
  if Enabled AND (not FileErrorO) then begin
    //FileErrorO := true;
    AssignFile(FileError, LogPath + 'Error.log');
    {$I-}
    Rewrite(FileError);
    if IOResult = 0 then FileErrorO := true;
    {$I+}

    //If File is opened write Date to Error File
    If (FileErrorO) then
    begin
      WriteLn(FileError, Title + ' Error Log');
      WriteLn(FileError, 'Date: ' + DatetoStr(Now) + ' Time: ' + TimetoStr(Now));
      WriteLn(FileError, '-------------------');

      Flush(FileError);
    end;
  end;

  if FileErrorO then begin
    try
      WriteLn(FileError, Text);
      Flush(FileError);
    except
      FileErrorO := false;
    end;
  end;
  {$IFDEF DEBUG}
  SafeWriteLn('Error: ' + Text);
  {$ENDIF}
end;

procedure TLog.LogVoice(SoundNr: integer);
var
  FileVoice:    File;
  FS:           TFileStream;
  FileName:     string;
  Num:          integer;
begin
  for Num := 1 to 9999 do begin
    FileName := IntToStr(Num);
    while Length(FileName) < 4 do FileName := '0' + FileName;
    FileName := LogPath + 'Voice' + FileName + '.raw';
    if not FileExists(FileName) then break
  end;


  FS := TFileStream.Create(FileName, fmCreate);

  AudioInputProcessor.Sound[SoundNr].BufferLong.Seek(0, soBeginning);
  FS.CopyFrom(AudioInputProcessor.Sound[SoundNr].BufferLong, AudioInputProcessor.Sound[SoundNr].BufferLong.Size);

  FS.Free;
end;

procedure TLog.LogStatus(Log1, Log2: string);
begin
  //Just for Debugging
  //Comment for Release    
  //LogError(Log2 + ': ' + Log1);

  //If Debug => Write to Console Output
  {$IFDEF DEBUG}
  // SafeWriteLn(Log2 + ': ' + Log1);
  {$ENDIF}
end;

procedure TLog.LogError(Log1, Log2: string);
begin
  LogError(Log1 + ' ['+Log2+']');
end;

procedure TLog.CriticalError(Text: string);
begin
  //Write Error to Logfile:
  LogError (Text);

  {$IFDEF MSWINDOWS}
  //Show Errormessage
  Messagebox(0, PChar(Text), PChar(Title), MB_ICONERROR or MB_OK);
  {$ELSE}
  // TODO - JB_Linux handle critical error so user can see message.
  SafeWriteLn( 'Critical ERROR :' );
  SafeWriteLn( Text );
  {$ENDIF}

  //Exit Application
  Halt;
end;

procedure TLog.LogBuffer(const buf: Pointer; const bufLength: Integer; filename: string);
var
  f : TFileStream;
begin
  f := nil;

  try
    f := TFileStream.Create( filename, fmCreate);
    f.Write( buf^, bufLength);
    f.Free;
  except
    on e : Exception do begin
      Log.LogError('TLog.LogBuffer: Failed to log buffer into file "' + filename + '". ErrMsg: ' + e.Message);
      f.Free;
    end;
  end;
end;

end.