aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.3.1/gcc/ada/s-finroo.ads
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.3.1/gcc/ada/s-finroo.ads')
-rw-r--r--gcc-4.3.1/gcc/ada/s-finroo.ads87
1 files changed, 87 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/s-finroo.ads b/gcc-4.3.1/gcc/ada/s-finroo.ads
new file mode 100644
index 000000000..79f403c5f
--- /dev/null
+++ b/gcc-4.3.1/gcc/ada/s-finroo.ads
@@ -0,0 +1,87 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . F I N A L I Z A T I O N _ R O O T --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
+-- --
+-- GNAT 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. GNAT 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 GNAT; 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. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This unit provides the basic support for controlled (finalizable) types
+
+with Ada.Streams;
+with Ada.Unchecked_Conversion;
+
+package System.Finalization_Root is
+ pragma Preelaborate;
+
+ type Root_Controlled is tagged;
+
+ type Finalizable_Ptr is access all Root_Controlled'Class;
+
+ function To_Finalizable_Ptr is
+ new Ada.Unchecked_Conversion (Address, Finalizable_Ptr);
+
+ function To_Addr is
+ new Ada.Unchecked_Conversion (Finalizable_Ptr, Address);
+
+ type Empty_Root_Controlled is abstract tagged null record;
+ -- Just for the sake of Controlled equality (see Ada.Finalization)
+
+ type Root_Controlled is new Empty_Root_Controlled with record
+ Prev, Next : Finalizable_Ptr;
+ end record;
+ subtype Finalizable is Root_Controlled'Class;
+
+ procedure Initialize (Object : in out Root_Controlled);
+ procedure Finalize (Object : in out Root_Controlled);
+ procedure Adjust (Object : in out Root_Controlled);
+
+ -- Stream-oriented attibutes for Root_Controlled. These must be empty so
+ -- as to not copy the finalization chain pointers. They are declared in
+ -- a nested package so that they do not create primitive operations of
+ -- Root_Controlled. Otherwise this would add unwanted primitives to (the
+ -- full view of) Ada.Finalization.Limited_Controlled, which would cause
+ -- trouble in cases where a limited controlled type is used as the
+ -- designated type of a remote access-to-classwide type.
+
+ package Stream_Attributes is
+
+ procedure Write
+ (Stream : not null access Ada.Streams.Root_Stream_Type'Class;
+ Item : Root_Controlled) is null;
+
+ procedure Read
+ (Stream : not null access Ada.Streams.Root_Stream_Type'Class;
+ Item : out Root_Controlled) is null;
+
+ end Stream_Attributes;
+
+ for Root_Controlled'Read use Stream_Attributes.Read;
+ for Root_Controlled'Write use Stream_Attributes.Write;
+
+end System.Finalization_Root;