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Diffstat (limited to 'gcc-4.4.0/gcc/ada/i-vxwoio.ads')
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diff --git a/gcc-4.4.0/gcc/ada/i-vxwoio.ads b/gcc-4.4.0/gcc/ada/i-vxwoio.ads new file mode 100644 index 000000000..79aca27ad --- /dev/null +++ b/gcc-4.4.0/gcc/ada/i-vxwoio.ads @@ -0,0 +1,226 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- I N T E R F A C E S . V X W O R K S . I O -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2002-2009, 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 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 -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides a binding to the functions fileno and ioctl +-- in VxWorks, providing a set of definitions of ioctl function codes +-- and options for the use of these functions. + +-- A particular use of this interface is to enable use of Get_Immediate +-- in Ada.Text_IO. There is no way in VxWorks to provide the desired +-- functionality of Get_Immediate (no buffering and no waiting for a +-- line return) without flushing the buffer, which violates the Ada +-- semantic requirements for Ada.Text_IO. + +with Interfaces.C_Streams; + +package Interfaces.VxWorks.IO is + + ------------------------- + -- The ioctl Interface -- + -------------------------- + + type FUNCODE is new int; + -- Type of the function codes in ioctl + + type IOOPT is mod 2 ** int'Size; + -- Type of the option codes in ioctl + + -- ioctl function codes + -- For more information see ioLib.h + + FIONREAD : constant FUNCODE := 1; + FIOFLUSH : constant FUNCODE := 2; + FIOOPTIONS : constant FUNCODE := 3; + FIOBAUDRATE : constant FUNCODE := 4; + FIODISKFORMAT : constant FUNCODE := 5; + FIODISKINIT : constant FUNCODE := 6; + FIOSEEK : constant FUNCODE := 7; + FIOWHERE : constant FUNCODE := 8; + FIODIRENTRY : constant FUNCODE := 9; + FIORENAME : constant FUNCODE := 10; + FIOREADYCHANGE : constant FUNCODE := 11; + FIONWRITE : constant FUNCODE := 12; + FIODISKCHANGE : constant FUNCODE := 13; + FIOCANCEL : constant FUNCODE := 14; + FIOSQUEEZE : constant FUNCODE := 15; + FIONBIO : constant FUNCODE := 16; + FIONMSGS : constant FUNCODE := 17; + FIOGETNAME : constant FUNCODE := 18; + FIOGETOPTIONS : constant FUNCODE := 19; + FIOSETOPTIONS : constant FUNCODE := FIOOPTIONS; + FIOISATTY : constant FUNCODE := 20; + FIOSYNC : constant FUNCODE := 21; + FIOPROTOHOOK : constant FUNCODE := 22; + FIOPROTOARG : constant FUNCODE := 23; + FIORBUFSET : constant FUNCODE := 24; + FIOWBUFSET : constant FUNCODE := 25; + FIORFLUSH : constant FUNCODE := 26; + FIOWFLUSH : constant FUNCODE := 27; + FIOSELECT : constant FUNCODE := 28; + FIOUNSELECT : constant FUNCODE := 29; + FIONFREE : constant FUNCODE := 30; + FIOMKDIR : constant FUNCODE := 31; + FIORMDIR : constant FUNCODE := 32; + FIOLABELGET : constant FUNCODE := 33; + FIOLABELSET : constant FUNCODE := 34; + FIOATTRIBSE : constant FUNCODE := 35; + FIOCONTIG : constant FUNCODE := 36; + FIOREADDIR : constant FUNCODE := 37; + FIOFSTATGET : constant FUNCODE := 38; + FIOUNMOUNT : constant FUNCODE := 39; + FIOSCSICOMMAND : constant FUNCODE := 40; + FIONCONTIG : constant FUNCODE := 41; + FIOTRUNC : constant FUNCODE := 42; + FIOGETFL : constant FUNCODE := 43; + FIOTIMESET : constant FUNCODE := 44; + FIOINODETONAM : constant FUNCODE := 45; + FIOFSTATFSGE : constant FUNCODE := 46; + + -- ioctl option values + + OPT_ECHO : constant IOOPT := 16#0001#; + OPT_CRMOD : constant IOOPT := 16#0002#; + OPT_TANDEM : constant IOOPT := 16#0004#; + OPT_7_BIT : constant IOOPT := 16#0008#; + OPT_MON_TRAP : constant IOOPT := 16#0010#; + OPT_ABORT : constant IOOPT := 16#0020#; + OPT_LINE : constant IOOPT := 16#0040#; + OPT_RAW : constant IOOPT := 16#0000#; + OPT_TERMINAL : constant IOOPT := OPT_ECHO or + OPT_CRMOD or + OPT_TANDEM or + OPT_MON_TRAP or + OPT_7_BIT or + OPT_ABORT or + OPT_LINE; + + function fileno (Fp : Interfaces.C_Streams.FILEs) return int; + pragma Import (C, fileno, "fileno"); + -- Binding to the C routine fileno + + function ioctl (Fd : int; Function_Code : FUNCODE; Arg : IOOPT) return int; + pragma Import (C, ioctl, "ioctl"); + -- Binding to the C routine ioctl + + ------------------------------ + -- Control of Get_Immediate -- + ------------------------------ + + -- The procedures in this section make use of the interface to ioctl + -- and fileno to provide a mechanism for enabling unbuffered behavior + -- for Get_Immediate in VxWorks. + + -- The situation is that the RM requires that the use of Get_Immediate + -- be identical to Get except that it is desirable (not required) that + -- there be no buffering or line editing. + + -- Unfortunately, in VxWorks, the only way to enable this desired + -- unbuffered behavior involves changing into raw mode. But this + -- transition into raw mode flushes the input buffer, a behavior + -- not permitted by the RM semantics for Get_Immediate. + + -- Given that Get_Immediate cannot be accurately implemented in + -- raw mode, it seems best not to enable it by default, and instead + -- to require specific programmer action, with the programmer being + -- aware that input may be lost. + + -- The following is an example of the use of the two procedures + -- in this section (Enable_Get_Immediate and Disable_Get_Immediate) + + -- with Ada.Text_IO; use Ada.Text_IO; + -- with Ada.Text_IO.C_Streams; use Ada.Text_IO.C_Streams; + -- with Interfaces.VxWorks.IO; use Interfaces.VxWorks.IO; + + -- procedure Example_IO is + -- Input : Character; + -- Available : Boolean; + -- Success : Boolean; + + -- begin + -- Enable_Get_Immediate (C_Stream (Current_Input), Success); + + -- if Success = False then + -- raise Device_Error; + -- end if; + + -- -- Example with the first type of Get_Immediate + -- -- Waits for an entry on the input. Immediately returns + -- -- after having received an character on the input + + -- Put ("Input -> "); + -- Get_Immediate (Input); + -- New_Line; + -- Put_Line ("Character read: " & Input); + + -- -- Example with the second type of Get_Immediate + -- -- This is equivalent to a non blocking read + + -- for J in 1 .. 10 loop + -- Put ("Input -> "); + -- Get_Immediate (Input, Available); + -- New_Line; + + -- if Available = True then + -- Put_Line ("Character read: " & Input); + -- end if; + + -- delay 1.0; + -- end loop; + + -- Disable_Get_Immediate (C_Stream (Current_Input), Success); + + -- if Success = False then + -- raise Device_Error; + -- end if; + + -- exception + -- when Device_Error => + -- Put_Line ("Device Error. Check your configuration"); + -- end Example_IO; + + procedure Enable_Get_Immediate + (File : Interfaces.C_Streams.FILEs; + Success : out Boolean); + -- On VxWorks, a call to this procedure is required before subsequent calls + -- to Get_Immediate have the desired effect of not waiting for a line + -- return. The reason that this call is not automatic on this target is + -- that the call flushes the input buffer, discarding any previous input. + -- Note: Following a call to Enable_Get_Immediate, the only permitted + -- operations on the relevant file are Get_Immediate operations. Any + -- other operations have undefined behavior. + + procedure Disable_Get_Immediate + (File : Interfaces.C_Streams.FILEs; + Success : out Boolean); + -- This procedure resets File to standard mode, and permits subsequent + -- use of the full range of Ada.Text_IO functions + +end Interfaces.VxWorks.IO; |