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/g-enblsp-vms-alpha.adb | 130 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 gcc/ada/g-enblsp-vms-alpha.adb (limited to 'gcc/ada/g-enblsp-vms-alpha.adb') diff --git a/gcc/ada/g-enblsp-vms-alpha.adb b/gcc/ada/g-enblsp-vms-alpha.adb new file mode 100644 index 000000000..64af051d8 --- /dev/null +++ b/gcc/ada/g-enblsp-vms-alpha.adb @@ -0,0 +1,130 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T . E X P E C T . N O N _ B L O C K I N G _ S P A W N -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2005-2009, AdaCore -- +-- -- +-- 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 package provides a target dependent non-blocking spawn function +-- for use by the VMS GNAT.Expect package (g-expect-vms.adb). This package +-- should not be directly with'ed by an application program. + +-- This version is for Alpha/VMS + +separate (GNAT.Expect) +procedure Non_Blocking_Spawn + (Descriptor : out Process_Descriptor'Class; + Command : String; + Args : GNAT.OS_Lib.Argument_List; + Buffer_Size : Natural := 4096; + Err_To_Out : Boolean := False) +is + function Alloc_Vfork_Blocks return Integer; + pragma Import (C, Alloc_Vfork_Blocks, "decc$$alloc_vfork_blocks"); + + function Get_Vfork_Jmpbuf return System.Address; + pragma Import (C, Get_Vfork_Jmpbuf, "decc$$get_vfork_jmpbuf"); + + function Get_Current_Invo_Context + (Addr : System.Address) return Process_Id; + pragma Import (C, Get_Current_Invo_Context, + "LIB$GET_CURRENT_INVO_CONTEXT"); + + Pipe1, Pipe2, Pipe3 : aliased Pipe_Type; + + Arg : String_Access; + Arg_List : aliased array (1 .. Args'Length + 2) of System.Address; + + Command_With_Path : String_Access; + +begin + -- Create the rest of the pipes + + Set_Up_Communications + (Descriptor, Err_To_Out, Pipe1'Access, Pipe2'Access, Pipe3'Access); + + Command_With_Path := Locate_Exec_On_Path (Command); + + if Command_With_Path = null then + raise Invalid_Process; + end if; + + -- Fork a new process (it is not possible to do this in a subprogram) + + Descriptor.Pid := + (if Alloc_Vfork_Blocks >= 0 + then Get_Current_Invo_Context (Get_Vfork_Jmpbuf) else -1); + + -- Are we now in the child + + if Descriptor.Pid = Null_Pid then + + -- Prepare an array of arguments to pass to C + + Arg := new String (1 .. Command_With_Path'Length + 1); + Arg (1 .. Command_With_Path'Length) := Command_With_Path.all; + Arg (Arg'Last) := ASCII.NUL; + Arg_List (1) := Arg.all'Address; + + for J in Args'Range loop + Arg := new String (1 .. Args (J)'Length + 1); + Arg (1 .. Args (J)'Length) := Args (J).all; + Arg (Arg'Last) := ASCII.NUL; + Arg_List (J + 2 - Args'First) := Arg.all'Address; + end loop; + + Arg_List (Arg_List'Last) := System.Null_Address; + + -- This does not return on Unix systems + + Set_Up_Child_Communications + (Descriptor, Pipe1, Pipe2, Pipe3, Command_With_Path.all, + Arg_List'Address); + end if; + + Free (Command_With_Path); + + -- Did we have an error when spawning the child ? + + if Descriptor.Pid < Null_Pid then + raise Invalid_Process; + else + -- We are now in the parent process + + Set_Up_Parent_Communications (Descriptor, Pipe1, Pipe2, Pipe3); + end if; + + -- Create the buffer + + Descriptor.Buffer_Size := Buffer_Size; + + if Buffer_Size /= 0 then + Descriptor.Buffer := new String (1 .. Positive (Buffer_Size)); + end if; +end Non_Blocking_Spawn; -- cgit v1.2.3