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Diffstat (limited to 'gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c960002.a')
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diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c960002.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c960002.a new file mode 100644 index 000000000..06edaf0c9 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c960002.a @@ -0,0 +1,171 @@ +-- C960002.A +-- +-- Grant of Unlimited Rights +-- +-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, +-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained +-- unlimited rights in the software and documentation contained herein. +-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making +-- this public release, the Government intends to confer upon all +-- recipients unlimited rights equal to those held by the Government. +-- These rights include rights to use, duplicate, release or disclose the +-- released technical data and computer software in whole or in part, in +-- any manner and for any purpose whatsoever, and to have or permit others +-- to do so. +-- +-- DISCLAIMER +-- +-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR +-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED +-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE +-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE +-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A +-- PARTICULAR PURPOSE OF SAID MATERIAL. +--* +-- +-- OBJECTIVE: +-- Check that the simple "delay until" when the request time is "now" and +-- also some time already in the past is obeyed and returns immediately +-- +-- TEST DESCRIPTION: +-- Simulate a task that sends a "pulse" at regular intervals. The Delay +-- Until statement is used to avoid accumulated drift. In this test +-- three simple situations simulating the start of drift are used: the +-- next pulse being called for at the normal time, the next pulse being +-- called for at exactly the current time and then at some time which has +-- already past. We assume the delay is within a While Loop and, to +-- simplify the test, we "unfold" the While Loop and execute the Delays +-- in a serial fashion. This loop is shown in test C960001. +-- It is not possible to test the actual immediacy of the expiration. We +-- can only check that it returns in a "reasonable" time. In this case +-- we check that it expires before the next "pulse" should have been +-- issued. +-- +-- +-- CHANGE HISTORY: +-- 06 Dec 94 SAIC ACVC 2.0 +-- +--! + +with Report; +with ImpDef; + +with Ada.Calendar; +with System; + +procedure C960002 is + +begin + + Report.Test ("C960002", "Simple Delay Until with requested time being" & + " ""now"" and time already in the past"); + + declare -- To get the Report.Result after all has completed + + function "+" (Left : Ada.Calendar.Time; Right: Duration) + return Ada.Calendar.Time renames Ada.Calendar."+"; + function "-" (Left : Ada.Calendar.Time; Right: Duration) + return Ada.Calendar.Time renames Ada.Calendar."-"; + function "-" (Left, Right : Ada.Calendar.Time) + return duration renames Ada.Calendar."-"; + function ">" (Left, Right : Ada.Calendar.Time) + return Boolean renames Ada.Calendar.">"; + + + task Pulse_Task is + entry Trigger; + end Pulse_Task; + + + -- Task to synchronize all qualified receivers. + -- The entry Trigger starts the synchronization. + -- + task body Pulse_Task is + Pulse_Time : Ada.Calendar.Time; + Pulse_Time_Delta : constant duration := ImpDef.Clear_Ready_Queue; + + + + TC_Time_Back : Ada.Calendar.Time; + + + -- This routine transmits a synchronizing "pulse" to + -- all receivers + procedure Pulse is + begin + null; -- Stub + Report.Comment (".......PULSE........"); + end Pulse; + + begin + accept Trigger; + Pulse; + --------------- + -- normal calculation for "next" + Pulse_Time := Ada.Calendar.Clock + Pulse_Time_Delta; + + -- TC: unfold the "while" loop in C960001. Four passes through + -- the loop are shown + + delay until Pulse_Time; + + Pulse; + --------------- + -- TC: the normal calculation for "next" would be + -- Pulse_Time := Pulse_Time + Pulse_Time_Delta; + -- Instead of this normal pulse time calculation simulate + -- the new pulse time to be exactly "now" (or, as exactly as + -- we can) + Pulse_Time := Ada.Calendar.Clock; + delay until Ada.Calendar.Clock; + + TC_Time_Back := Ada.Calendar.Clock; + + -- Now check for reasonableness + if TC_Time_Back > Pulse_Time + Pulse_Time_Delta then + Report.Failed + ("""Now"" delayed for more than Pulse_Time_Delta - A"); + end if; + Pulse; + --------------- + -- normal calculation for "next" would be + Pulse_Time := Pulse_Time + Pulse_Time_Delta; + + -- TC: Instead of this, simulate the new calculated pulse time + -- being already past + Pulse_Time := Ada.Calendar.Clock - System.Tick; + delay until Pulse_Time; + + TC_Time_Back := Ada.Calendar.Clock; + + -- Now check for reasonableness + if TC_Time_Back > Pulse_Time + Pulse_Time_Delta then + Report.Failed + ("""Now"" delayed for more than Pulse_Time_Delta - B"); + end if; + Pulse; + --------------- + -- normal calculation for "next" + Pulse_Time := Pulse_Time + Pulse_Time_Delta; + -- Now simulate getting back into synch + delay until Pulse_Time; + Pulse; + --------------- + -- This would be the end of the "while" loop + + exception + when others => + Report.Failed ("Unexpected exception in Pulse_Task"); + end Pulse_Task; + + + + begin -- declare + + Pulse_Task.Trigger; -- Start test + + end; -- declare + + Report.Result; + +end C960002; |