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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-osprim-vms.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-osprim-vms.ads | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-osprim-vms.ads b/gcc-4.2.1/gcc/ada/s-osprim-vms.ads deleted file mode 100644 index 91d545c40..000000000 --- a/gcc-4.2.1/gcc/ada/s-osprim-vms.ads +++ /dev/null @@ -1,107 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . O S _ P R I M I T I V E S -- --- -- --- S p e c -- --- -- --- Copyright (C) 1998-2005 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- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNARL is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNARL; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- 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. -- --- -- ------------------------------------------------------------------------------- - --- This package provides low level primitives used to implement clock and --- 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) - --- NEVER add any dependency to tasking packages here - -package System.OS_Primitives is - pragma Preelaborate; - - subtype OS_Time is Long_Integer; - -- System time on VMS is used for performance reasons. - -- Note that OS_Time is *not* the same as Ada.Calendar.Time, the - -- difference being that relative OS_Time is negative, but relative - -- Calendar.Time is positive. - -- See Ada.Calendar.Delays for more information on VMS Time. - - 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. - - function OS_Clock return OS_Time; - -- Returns "absolute" time, represented as an offset - -- relative to "the Epoch", which is Nov 17, 1858 on VMS. - - 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. - - 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. - - 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. - - procedure Timed_Delay (Time : Duration; Mode : Integer); - -- 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. - -- This may change in future or bare board implementations. - - function To_Duration (T : OS_Time; Mode : Integer) return Duration; - -- Convert VMS system time to Duration - -- Mode is one of the three values above - - function To_OS_Time (D : Duration; Mode : Integer) return OS_Time; - -- Convert Duration to VMS system time - -- Mode is one of the three values above - -end System.OS_Primitives; |