PACKET pcb and init control DEFINES         (* Autor: J.Liedtke *)
                                            (* Stand: 25.08.84  *)
  session ,
  pcb ,
  set line nr ,
  clock ,
  INITFLAG ,
  := ,
  initialized ,
  storage ,
  id ,
  ke :


LET line number field     = 1 ,
    myself id field       = 9 ;

TYPE INITFLAG = INT ;


INT PROC session :
  EXTERNAL 126
ENDPROC session ;

INT PROC pcb (INT CONST field) :
  EXTERNAL 80
ENDPROC pcb ;

PROC write pcb (INT CONST task nr, field, value) :
  EXTERNAL 105
ENDPROC write pcb ;

PROC set line nr (INT CONST value) :
  write pcb (pcb (myself id field), line number field, value)
ENDPROC set line nr ;


OP := (INITFLAG VAR flag, BOOL CONST flagtrue) :

  IF flagtrue
    THEN CONCR (flag) := myself no
    ELSE CONCR (flag) := 0
  FI .

myself no :   pcb (myself id field) AND 255 .

ENDOP := ;

BOOL PROC initialized (INITFLAG VAR flag) :

  IF CONCR (flag) = myself no
    THEN TRUE
    ELSE CONCR (flag) := myself no ;
         FALSE
  FI .

myself no :   pcb (myself id field) AND 255 .

ENDPROC initialized ;

REAL PROC clock (INT CONST nr) :
  EXTERNAL 102
ENDPROC clock ;

PROC storage (INT VAR size, used) :
  EXTERNAL 89
ENDPROC storage ;

INT PROC id (INT CONST no) :
  EXTERNAL 129
ENDPROC id ;

PROC ke :
  EXTERNAL 6
ENDPROC ke ;

ENDPACKET pcb and init control ;