' Gambas class file

Static Public All As New Collection

Static Private $sCompiler As String
'Static Private $sCompilerVersion As String
Static Private $aFlags As String[]

Public Name As String
Public PathSO As String

'Private $sCache As String
Private $sResult As String
Private $fTime As Float
Private $hProcess As Process

Static Public Sub Init()

  Dim sFlag As String
  Dim sCompiler As String
  
  If $sCompiler Then Return
  
  sCompiler = Env["GB_JIT_CC"]
  If Not sCompiler Then sCompiler = "gcc"
  
  $sCompiler = System.Find(sCompiler)
  If Not $sCompiler Then Error.Raise("Compiler not found")

  sFlag = Env["GB_JIT_CFLAGS"] 
  If Not sFlag Then sFlag = "-O3 -march=native -mtune=native"
  
  $aFlags = Split(sFlag, " ")
  
  ' Exec [$sCompiler, "-V"] To $sCompilerVersion
  ' $sCompilerVersion = Trim($sCompilerVersion)
   
End

Public Sub _new(sName As String, sPathSO As String, fTime As Float)
  
  Name = sName
  PathSO = sPathSO
  $fTime = fTime
  All[sName] = Me
  
End

Public Sub Run(sInput As String, Optional sOption As String)

  Dim aExec As String[]
  'Dim sHash As String
  'Dim iPos As Integer
  
  'Dim I As Integer
  
  ' $sCache = File.Dir(File.Dir(Temp$())) &/ "gb.jit"
  ' Try Mkdir $sCache
  
  ' Exec ["md5sum", sInput] To sHash
  ' iPos = InStr(sHash, " ")
  ' If iPos Then
  '   $sCache &/= File.BaseName(PathSO) & "-" & Left(sHash, iPos - 1) & "." & File.Ext(PathSO)
  ' Else
  '   $sCache = ""
  ' Endif
  
  'If Not $sCache Or If Not Exist($sCache) Then
    
    aExec = [$sCompiler]
    If sOption Then aExec.Insert(Split(sOption, " "))
    aExec.Insert($aFlags)
    aExec.Add(sInput)
    aExec.Add("-o")
    'If Not $sCache Then
      aExec.Add(PathSO)
    'Else
    '  aExec.Add($sCache)
    'Endif

    If Jit.Debug Then Error "gb.jit: run: "; aExec.Join(" ")
    
    $hProcess = Exec aExec For Read As "Compiler"
    
  ' Else
  '   
  '   If Jit.Debug Then Error "gb.jit: using cache: "; $sCache
  ' 
  ' Endif  
  
  ' If $sCache Then 
  '   Link $sCache To PathSO
  ' Endif
  
  ' For I = 0 To aExec.Max
  '   aExec[I] = Shell$(aExec[I])
  ' Next
  
  '$hProcess.Ignore = True
  'System._Breakpoint
  
End

Public Sub Compiler_Read()

  Dim sData As String

  sData = Read #$hProcess, -1024
  $sResult &= sData
  
End

Public Sub Compiler_Error(({Error}) As String)
  
  $sResult &= {Error}
  
End

Public Sub Compiler_Kill()

  If $hProcess.Value = 0 Then
    $fTime = Timer - $fTime
    Jit._Time += $fTime
    If Jit.Debug Then Error "gb.jit: compilation of '"; Name; "' done in "; Format($fTime, "0.000"); " s"
  Else
    If Jit.Debug Then Error "gb.jit: compilation of '"; Name; "' returns "; $hProcess.Value
  Endif
  
  'If Jit.Debug And If $sCache Then Error "gb.jit: writing cache: "; $sCache
  
  $hProcess = Null
  
  ' Shell "objdump -S " & Shell(sPathSO) To sResult
  ' Error sResult
  
End

Public Sub Wait() As String
  
  If Jit.Debug Then Error "gb.jit: waiting for compilation of '"; Name; "'..."
  
  If $hProcess Then
    $hProcess.Wait
    If Jit.Debug Then Error "gb.jit: compilation of '"; Name; "' is available"
  Endif
  
  If Not Exist(PathSO) Then 
    Error "gb.jit: error: unable to compile JIT code of '"; Name; "':\n"
    Error $sResult
    Return
  Endif
  
  Return PathSO
  
End

Public Sub Kill()

  If $hProcess Then
    If Jit.Debug Then Error "gb.jit: abort compilation of '"; Name; "'"
    $hProcess.Kill
  Endif
  
End