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author | charlet <charlet@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-02-10 13:48:50 +0000 |
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committer | charlet <charlet@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-02-10 13:48:50 +0000 |
commit | 3bb8af62398b088423a940f1ec2294f2550ca17c (patch) | |
tree | 7139ee6d806b22924db1974b85299cc52c37d118 /gcc/ada/g-enblsp-vms-ia64.adb | |
parent | 6889dad0e90b71ef855ad346f63e1ee82464e8b4 (diff) | |
download | ppe42-gcc-3bb8af62398b088423a940f1ec2294f2550ca17c.tar.gz ppe42-gcc-3bb8af62398b088423a940f1ec2294f2550ca17c.zip |
2005-02-09 Doug Rupp <rupp@adacore.com>
* g-expect-vms.adb (Non_Blocking_Spawn): Separate out.
* g-enblsp-vms-alpha.adb g-enblsp-vms-ia64.adb: New subunits.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@94806 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ada/g-enblsp-vms-ia64.adb')
-rw-r--r-- | gcc/ada/g-enblsp-vms-ia64.adb | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/gcc/ada/g-enblsp-vms-ia64.adb b/gcc/ada/g-enblsp-vms-ia64.adb new file mode 100644 index 00000000000..711c9924c14 --- /dev/null +++ b/gcc/ada/g-enblsp-vms-ia64.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 Ada Core Technologies, 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, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, 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 IA64/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 Setjmp1 (Addr : System.Address) return Process_Id; + pragma Import (C, Setjmp1, "decc$setjmp1"); + + 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's not possible to do this in a subprogram. + + if Alloc_Vfork_Blocks >= 0 then + Descriptor.Pid := Setjmp1 (Get_Vfork_Jmpbuf); + else + Descriptor.Pid := -1; + end if; + + -- Are we now in the child (or, for Windows, still in the common + -- process). + + 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; |