From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/s-direio.ads | 142 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 gcc/ada/s-direio.ads (limited to 'gcc/ada/s-direio.ads') diff --git a/gcc/ada/s-direio.ads b/gcc/ada/s-direio.ads new file mode 100644 index 000000000..35fcef05d --- /dev/null +++ b/gcc/ada/s-direio.ads @@ -0,0 +1,142 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . D I R E C T _ I O -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2009, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- . -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains the declaration of the control block used for +-- Direct_IO. This must be declared at the outer library level. It also +-- contains code that is shared between instances of Direct_IO. + +with Interfaces.C_Streams; +with Ada.Streams; +with System.File_Control_Block; +with System.Storage_Elements; + +package System.Direct_IO is + + package FCB renames System.File_Control_Block; + + type Operation is (Op_Read, Op_Write, Op_Other); + -- Type used to record last operation (to optimize sequential operations) + + subtype Count is Interfaces.C_Streams.long; + -- The Count type in each instantiation is derived from this type + + subtype Positive_Count is Count range 1 .. Count'Last; + + type Direct_AFCB is new FCB.AFCB with record + Index : Count := 1; + -- Current Index value + + Bytes : Interfaces.C_Streams.size_t; + -- Length of item in bytes (set from inside generic template) + + Last_Op : Operation := Op_Other; + -- Last operation performed on file, used to avoid unnecessary + -- repositioning between successive read or write operations. + end record; + + function AFCB_Allocate (Control_Block : Direct_AFCB) return FCB.AFCB_Ptr; + + procedure AFCB_Close (File : not null access Direct_AFCB); + procedure AFCB_Free (File : not null access Direct_AFCB); + + procedure Read + (File : in out Direct_AFCB; + Item : out Ada.Streams.Stream_Element_Array; + Last : out Ada.Streams.Stream_Element_Offset); + -- Required overriding of Read, not actually used for Direct_IO + + procedure Write + (File : in out Direct_AFCB; + Item : Ada.Streams.Stream_Element_Array); + -- Required overriding of Write, not actually used for Direct_IO + + type File_Type is access all Direct_AFCB; + -- File_Type in individual instantiations is derived from this type + + procedure Create + (File : in out File_Type; + Mode : FCB.File_Mode := FCB.Inout_File; + Name : String := ""; + Form : String := ""); + + function End_Of_File (File : File_Type) return Boolean; + + function Index (File : File_Type) return Positive_Count; + + procedure Open + (File : in out File_Type; + Mode : FCB.File_Mode; + Name : String; + Form : String := ""); + + procedure Read + (File : File_Type; + Item : System.Address; + Size : Interfaces.C_Streams.size_t; + From : Positive_Count); + + procedure Read + (File : File_Type; + Item : System.Address; + Size : Interfaces.C_Streams.size_t); + + procedure Reset (File : in out File_Type; Mode : FCB.File_Mode); + procedure Reset (File : in out File_Type); + + procedure Set_Index (File : File_Type; To : Positive_Count); + + function Size (File : File_Type) return Count; + + procedure Write + (File : File_Type; + Item : System.Address; + Size : Interfaces.C_Streams.size_t; + Zeroes : System.Storage_Elements.Storage_Array); + -- Note: Zeroes is the buffer of zeroes used to fill out partial records + + -- The following procedures have a File_Type formal of mode IN OUT because + -- they may close the original file. The Close operation may raise an + -- exception, but in that case we want any assignment to the formal to + -- be effective anyway, so it must be passed by reference (or the caller + -- will be left with a dangling pointer). + + pragma Export_Procedure + (Internal => Reset, + External => "", + Parameter_Types => (File_Type), + Mechanism => Reference); + pragma Export_Procedure + (Internal => Reset, + External => "", + Parameter_Types => (File_Type, FCB.File_Mode), + Mechanism => (File => Reference)); + +end System.Direct_IO; -- cgit v1.2.3