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

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;