#!/usr/bin/python
  #
  # rt-mutex tester
  #
  # (C) 2006 Thomas Gleixner <tglx@linutronix.de>
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License version 2 as
  # published by the Free Software Foundation.
  #
  import os
  import sys
  import getopt
  import shutil
  import string
  
  # Globals
  quiet = 0
  test = 0
  comments = 0
  
  sysfsprefix = "/sys/devices/system/rttest/rttest"
  statusfile = "/status"
  commandfile = "/command"
  
  # Command opcodes
  cmd_opcodes = {
      "schedother"    : "1",
      "schedfifo"     : "2",
      "lock"          : "3",
      "locknowait"    : "4",
      "lockint"       : "5",
      "lockintnowait" : "6",
      "lockcont"      : "7",
      "unlock"        : "8",
      "signal"        : "11",
      "resetevent"    : "98",
      "reset"         : "99",
      }
  
  test_opcodes = {
      "prioeq"        : ["P" , "eq" , None],
      "priolt"        : ["P" , "lt" , None],
      "priogt"        : ["P" , "gt" , None],
      "nprioeq"       : ["N" , "eq" , None],
      "npriolt"       : ["N" , "lt" , None],
      "npriogt"       : ["N" , "gt" , None],
      "unlocked"      : ["M" , "eq" , 0],
      "trylock"       : ["M" , "eq" , 1],
      "blocked"       : ["M" , "eq" , 2],
      "blockedwake"   : ["M" , "eq" , 3],
      "locked"        : ["M" , "eq" , 4],
      "opcodeeq"      : ["O" , "eq" , None],
      "opcodelt"      : ["O" , "lt" , None],
      "opcodegt"      : ["O" , "gt" , None],
      "eventeq"       : ["E" , "eq" , None],
      "eventlt"       : ["E" , "lt" , None],
      "eventgt"       : ["E" , "gt" , None],
      }
  
  # Print usage information
  def usage():
      print "rt-tester.py <-c -h -q -t> <testfile>"
      print " -c    display comments after first command"
      print " -h    help"
      print " -q    quiet mode"
      print " -t    test mode (syntax check)"
      print " testfile: read test specification from testfile"
      print " otherwise from stdin"
      return
  
  # Print progress when not in quiet mode
  def progress(str):
      if not quiet:
          print str
  
  # Analyse a status value
  def analyse(val, top, arg):
  
      intval = int(val)
  
      if top[0] == "M":
          intval = intval / (10 ** int(arg))
  	intval = intval % 10
          argval = top[2]
      elif top[0] == "O":
          argval = int(cmd_opcodes.get(arg, arg))
      else:
          argval = int(arg)
  
      # progress("%d %s %d" %(intval, top[1], argval))
  
      if top[1] == "eq" and intval == argval:
  	return 1
      if top[1] == "lt" and intval < argval:
          return 1
      if top[1] == "gt" and intval > argval:
  	return 1
      return 0
  
  # Parse the commandline
  try:
      (options, arguments) = getopt.getopt(sys.argv[1:],'chqt')
  except getopt.GetoptError, ex:
      usage()
      sys.exit(1)
  
  # Parse commandline options
  for option, value in options:
      if option == "-c":
          comments = 1
      elif option == "-q":
          quiet = 1
      elif option == "-t":
          test = 1
      elif option == '-h':
          usage()
          sys.exit(0)
  
  # Select the input source
  if arguments:
      try:
          fd = open(arguments[0])
      except Exception,ex:
          sys.stderr.write("File not found %s
  " %(arguments[0]))
          sys.exit(1)
  else:
      fd = sys.stdin
  
  linenr = 0
  
  # Read the test patterns
  while 1:
  
      linenr = linenr + 1
      line = fd.readline()
      if not len(line):
          break
  
      line = line.strip()
      parts = line.split(":")
  
      if not parts or len(parts) < 1:
          continue
  
      if len(parts[0]) == 0:
          continue
  
      if parts[0].startswith("#"):
  	if comments > 1:
  	    progress(line)
  	continue
  
      if comments == 1:
  	comments = 2
  
      progress(line)
  
      cmd = parts[0].strip().lower()
      opc = parts[1].strip().lower()
      tid = parts[2].strip()
      dat = parts[3].strip()
  
      try:
          # Test or wait for a status value
          if cmd == "t" or cmd == "w":
              testop = test_opcodes[opc]
  
              fname = "%s%s%s" %(sysfsprefix, tid, statusfile)
              if test:
  		print fname
                  continue
  
              while 1:
                  query = 1
                  fsta = open(fname, 'r')
                  status = fsta.readline().strip()
                  fsta.close()
                  stat = status.split(",")
                  for s in stat:
  		    s = s.strip()
                      if s.startswith(testop[0]):
                          # Separate status value
                          val = s[2:].strip()
                          query = analyse(val, testop, dat)
                          break
                  if query or cmd == "t":
                      break
  
              progress("   " + status)
  
              if not query:
                  sys.stderr.write("Test failed in line %d
  " %(linenr))
  		sys.exit(1)
  
          # Issue a command to the tester
          elif cmd == "c":
              cmdnr = cmd_opcodes[opc]
              # Build command string and sys filename
              cmdstr = "%s:%s" %(cmdnr, dat)
              fname = "%s%s%s" %(sysfsprefix, tid, commandfile)
              if test:
  		print fname
                  continue
              fcmd = open(fname, 'w')
              fcmd.write(cmdstr)
              fcmd.close()
  
      except Exception,ex:
      	sys.stderr.write(str(ex))
          sys.stderr.write("
  Syntax error in line %d
  " %(linenr))
          if not test:
              fd.close()
              sys.exit(1)
  
  # Normal exit pass
  print "Pass"
  sys.exit(0)