gcc/ada/a-exetim.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                   A D A . E X E C U T I O N _ T I M E                    --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 -- This specification is derived from the Ada Reference Manual for use with --
  10 -- GNAT.  In accordance with the copyright of that document, you can freely --
  11 -- copy and modify this specification,  provided that if you redistribute a --
  12 -- modified version,  any changes that you have made are clearly indicated. --
  13 --                                                                          --
  14 ------------------------------------------------------------------------------
  15
  16 --  This unit is not implemented in typical GNAT implementations that lie on
  17 --  top of operating systems, because it is infeasible to implement in such
  18 --  environments.
  19
  20 --  If a target environment provides appropriate support for this package
  21 --  then the Unimplemented_Unit pragma should be removed from this spec and
  22 --  an appropriate body provided.
  23
  24 with Ada.Task_Identification;
  25 with Ada.Real_Time;
  26
  27 package Ada.Execution_Time is
  28    pragma Preelaborate;
  29
  30    pragma Unimplemented_Unit;
  31
  32    type CPU_Time is private;
  33
  34    CPU_Time_First : constant CPU_Time;
  35    CPU_Time_Last  : constant CPU_Time;
  36    CPU_Time_Unit  : constant := 0.000001;
  37    CPU_Tick       : constant Ada.Real_Time.Time_Span;
  38
  39    function Clock
  40      (T : Ada.Task_Identification.Task_Id :=
  41             Ada.Task_Identification.Current_Task)
  42       return CPU_Time;
  43
  44    function "+"
  45      (Left  : CPU_Time;
  46       Right : Ada.Real_Time.Time_Span) return CPU_Time;
  47
  48    function "+"
  49      (Left  : Ada.Real_Time.Time_Span;
  50       Right : CPU_Time) return CPU_Time;
  51
  52    function "-"
  53      (Left  : CPU_Time;
  54       Right : Ada.Real_Time.Time_Span) return CPU_Time;
  55
  56    function "-"
  57      (Left  : CPU_Time;
  58       Right : CPU_Time) return Ada.Real_Time.Time_Span;
  59
  60    function "<"  (Left, Right : CPU_Time) return Boolean;
  61    function "<=" (Left, Right : CPU_Time) return Boolean;
  62    function ">"  (Left, Right : CPU_Time) return Boolean;
  63    function ">=" (Left, Right : CPU_Time) return Boolean;
  64
  65    procedure Split
  66      (T  : CPU_Time;
  67       SC : out Ada.Real_Time.Seconds_Count;
  68       TS : out Ada.Real_Time.Time_Span);
  69
  70    function Time_Of
  71       (SC : Ada.Real_Time.Seconds_Count;
  72        TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
  73        return CPU_Time;
  74
  75    Interrupt_Clocks_Supported          : constant Boolean := False;
  76    Separate_Interrupt_Clocks_Supported : constant Boolean := False;
  77
  78    function Clock_For_Interrupts return CPU_Time;
  79
  80 private
  81
  82    type CPU_Time is new Ada.Real_Time.Time;
  83
  84    CPU_Time_First : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_First);
  85    CPU_Time_Last  : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_Last);
  86
  87    CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
  88
  89 end Ada.Execution_Time;