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2007-04-20 Vasiliy Fofanov <fofanov@adacore.com>

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* s-osprim-vms.ads, s-osprim-vms.adb
	(Initialize) New procedure. Noop on VMS, added for interface
	commonality.

From-SVN: r125369
This commit is contained in:
Vasiliy Fofanov 2007-06-06 12:15:55 +02:00 committed by Arnaud Charlet
parent df86240803
commit 0cb8d27cd3
2 changed files with 39 additions and 25 deletions
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11
gcc/ada/s-osprim-vms.adb
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@ -6,7 +6,7 @@
-- --
-- B o d y --
-- --
-- Copyright (C) 1998-2006 Free Software Foundation, Inc. --
-- Copyright (C) 1998-2007, Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
@ -152,6 +152,15 @@ package body System.OS_Primitives is
return To_Duration (OS_Clock, Absolute_Calendar);
end Clock;
----------------
-- Initialize --
----------------
procedure Initialize is
begin
null;
end Initialize;
---------------------
-- Monotonic_Clock --
---------------------

53
gcc/ada/s-osprim-vms.ads
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@ -6,7 +6,7 @@
-- --
-- S p e c --
-- --
-- Copyright (C) 1998-2005 Free Software Foundation, Inc. --
-- Copyright (C) 1998-2007, Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
@ -27,12 +27,12 @@
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
-- This package provides low level primitives used to implement clock and
-- delays in non tasking applications on Alpha/VMS
-- delays in non tasking applications on Alpha/VMS.
-- The choice of the real clock/delay implementation (depending on whether
-- tasking is involved or not) is done via soft links (see s-soflin.ads)
@ -52,14 +52,19 @@ package System.OS_Primitives is
Max_Sensible_Delay : constant Duration :=
Duration'Min (183 * 24 * 60 * 60.0,
Duration'Last);
-- Max of half a year delay, needed to prevent exceptions for large
-- delay values. It seems unlikely that any test will notice this
-- restriction, except in the case of applications setting the clock at
-- at run time (see s-tastim.adb). Also note that a larger value might
-- cause problems (e.g overflow, or more likely OS limitation in the
-- primitives used). In the case where half a year is too long (which
-- occurs in high integrity mode with 32-bit words, and possibly on
-- some specific ports of GNAT), Duration'Last is used instead.
-- Max of half a year delay, needed to prevent exceptions for large delay
-- values. It seems unlikely that any test will notice this restriction,
-- except in the case of applications setting the clock at run time (see
-- s-tastim.adb). Also note that a larger value might cause problems (e.g
-- overflow, or more likely OS limitation in the primitives used). In the
-- case where half a year is too long (which occurs in high integrity mode
-- with 32-bit words, and possibly on some specific ports of GNAT),
-- Duration'Last is used instead.
procedure Initialize;
-- Initialize global settings related to this package. This procedure
-- should be called before any other subprograms in this package. Note
-- that this procedure can be called several times.
function OS_Clock return OS_Time;
-- Returns "absolute" time, represented as an offset
@ -67,33 +72,33 @@ package System.OS_Primitives is
function Clock return Duration;
pragma Inline (Clock);
-- Returns "absolute" time, represented as an offset
-- relative to "the Epoch", which is Jan 1, 1970 on unixes.
-- This implementation is affected by system's clock changes.
-- Returns "absolute" time, represented as an offset relative to "the
-- Epoch", which is Jan 1, 1970 00:00:00 UTC on UNIX systems. This
-- implementation is affected by system's clock changes.
function Monotonic_Clock return Duration;
pragma Inline (Monotonic_Clock);
-- Returns "absolute" time, represented as an offset
-- relative to "the Epoch", which is Jan 1, 1970.
-- This clock implementation is immune to the system's clock changes.
-- Returns "absolute" time, represented as an offset relative to "the Unix
-- Epoch", which is Jan 1, 1970 00:00:00 UTC. This clock implementation is
-- immune to the system's clock changes.
Relative : constant := 0;
Absolute_Calendar : constant := 1;
Absolute_RT : constant := 2;
-- Values for Mode call below. Note that the compiler (exp_ch9.adb)
-- relies on these values. So any change here must be reflected in
-- corresponding changes in the compiler.
-- Values for Mode call below. Note that the compiler (exp_ch9.adb) relies
-- on these values. So any change here must be reflected in corresponding
-- changes in the compiler.
procedure Timed_Delay (Time : Duration; Mode : Integer);
-- Implements the semantics of the delay statement when no tasking is
-- used in the application.
-- Implements the semantics of the delay statement when no tasking is used
-- in the application.
--
-- Mode is one of the three values above
--
-- Time is a relative or absolute duration value, depending on Mode.
--
-- Note that currently Ada.Real_Time always uses the tasking run time, so
-- this procedure should never be called with Mode set to Absolute_RT.
-- Note that currently Ada.Real_Time always uses the tasking run time,
-- so this procedure should never be called with Mode set to Absolute_RT.
-- This may change in future or bare board implementations.
function To_Duration (T : OS_Time; Mode : Integer) return Duration;