From 40d7cd0fd78fe2004e2a53c4618c148339b02733 Mon Sep 17 00:00:00 2001 From: Jing Yu Date: Mon, 19 Dec 2011 16:56:54 -0800 Subject: Add gcc-4.6. Synced to @180989 Change-Id: Ie3676586e1d8e3c8cd9f07d022f450d05fa08439 svn://gcc.gnu.org/svn/gcc/branches/google/gcc-4_6-mobile --- gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb | 106 +++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb (limited to 'gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb') diff --git a/gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb b/gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb new file mode 100644 index 000000000..c987f6e27 --- /dev/null +++ b/gcc-4.6/gcc/ada/s-tpopsp-posix-foreign.adb @@ -0,0 +1,106 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2009, 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 -- +-- . -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is a POSIX version of this package where foreign threads are +-- recognized. + +-- Currently, DEC Unix, SCO UnixWare, Solaris pthread, HPUX pthread and +-- GNU/Linux threads use this version. + +separate (System.Task_Primitives.Operations) +package body Specific is + + ---------------- + -- Initialize -- + ---------------- + + procedure Initialize (Environment_Task : Task_Id) is + pragma Warnings (Off, Environment_Task); + Result : Interfaces.C.int; + + begin + Result := pthread_key_create (ATCB_Key'Access, null); + pragma Assert (Result = 0); + end Initialize; + + ------------------- + -- Is_Valid_Task -- + ------------------- + + function Is_Valid_Task return Boolean is + begin + return pthread_getspecific (ATCB_Key) /= System.Null_Address; + end Is_Valid_Task; + + --------- + -- Set -- + --------- + + procedure Set (Self_Id : Task_Id) is + Result : Interfaces.C.int; + begin + Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id)); + pragma Assert (Result = 0); + end Set; + + ---------- + -- Self -- + ---------- + + -- To make Ada tasks and C threads interoperate better, we have added some + -- functionality to Self. Suppose a C main program (with threads) calls an + -- Ada procedure and the Ada procedure calls the tasking runtime system. + -- Eventually, a call will be made to self. Since the call is not coming + -- from an Ada task, there will be no corresponding ATCB. + + -- What we do in Self is to catch references that do not come from + -- recognized Ada tasks, and create an ATCB for the calling thread. + + -- The new ATCB will be "detached" from the normal Ada task master + -- hierarchy, much like the existing implicitly created signal-server + -- tasks. + + function Self return Task_Id is + Result : System.Address; + + begin + Result := pthread_getspecific (ATCB_Key); + + -- If the key value is Null then it is a non-Ada task + + if Result /= System.Null_Address then + return To_Task_Id (Result); + else + return Register_Foreign_Thread; + end if; + end Self; + +end Specific; -- cgit v1.2.3