120 lines
4.0 KiB
Ada
120 lines
4.0 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . E X E C U T I O N _ T I M E --
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-- --
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-- S p e c --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. In accordance with the copyright of that document, you can freely --
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-- copy and modify this specification, provided that if you redistribute a --
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-- modified version, any changes that you have made are clearly indicated. --
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-- --
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------------------------------------------------------------------------------
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-- This unit is not implemented in typical GNAT implementations that lie on
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-- top of operating systems, because it is infeasible to implement in such
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-- environments.
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-- If a target environment provides appropriate support for this package
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-- then the Unimplemented_Unit pragma should be removed from this spec and
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-- an appropriate body provided.
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with Ada.Task_Identification;
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with Ada.Real_Time;
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package Ada.Execution_Time with
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SPARK_Mode
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is
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pragma Preelaborate;
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pragma Unimplemented_Unit;
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type CPU_Time is private;
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CPU_Time_First : constant CPU_Time;
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CPU_Time_Last : constant CPU_Time;
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CPU_Time_Unit : constant := 0.000001;
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CPU_Tick : constant Ada.Real_Time.Time_Span;
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use type Ada.Task_Identification.Task_Id;
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function Clock
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(T : Ada.Task_Identification.Task_Id :=
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Ada.Task_Identification.Current_Task)
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return CPU_Time
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with
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Volatile_Function,
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Global => Ada.Real_Time.Clock_Time,
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Pre => T /= Ada.Task_Identification.Null_Task_Id;
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function "+"
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(Left : CPU_Time;
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Right : Ada.Real_Time.Time_Span) return CPU_Time
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with
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Global => null;
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function "+"
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(Left : Ada.Real_Time.Time_Span;
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Right : CPU_Time) return CPU_Time
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with
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Global => null;
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function "-"
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(Left : CPU_Time;
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Right : Ada.Real_Time.Time_Span) return CPU_Time
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with
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Global => null;
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function "-"
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(Left : CPU_Time;
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Right : CPU_Time) return Ada.Real_Time.Time_Span
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with
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Global => null;
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function "<" (Left, Right : CPU_Time) return Boolean with
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Global => null;
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function "<=" (Left, Right : CPU_Time) return Boolean with
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Global => null;
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function ">" (Left, Right : CPU_Time) return Boolean with
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Global => null;
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function ">=" (Left, Right : CPU_Time) return Boolean with
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Global => null;
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procedure Split
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(T : CPU_Time;
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SC : out Ada.Real_Time.Seconds_Count;
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TS : out Ada.Real_Time.Time_Span)
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with
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Global => null;
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function Time_Of
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(SC : Ada.Real_Time.Seconds_Count;
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TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
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return CPU_Time
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with
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Global => null;
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Interrupt_Clocks_Supported : constant Boolean := False;
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Separate_Interrupt_Clocks_Supported : constant Boolean := False;
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pragma Warnings (Off, "check will fail at run time");
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function Clock_For_Interrupts return CPU_Time with
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Volatile_Function,
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Global => Ada.Real_Time.Clock_Time,
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Pre => Interrupt_Clocks_Supported;
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pragma Warnings (On, "check will fail at run time");
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private
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pragma SPARK_Mode (Off);
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type CPU_Time is new Ada.Real_Time.Time;
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CPU_Time_First : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_First);
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CPU_Time_Last : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_Last);
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CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
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end Ada.Execution_Time;
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