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Diffstat (limited to 'gcc-4.4.0/gcc/ada/s-tpopsp-solaris.adb')
| -rw-r--r-- | gcc-4.4.0/gcc/ada/s-tpopsp-solaris.adb | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gcc-4.4.0/gcc/ada/s-tpopsp-solaris.adb b/gcc-4.4.0/gcc/ada/s-tpopsp-solaris.adb new file mode 100644 index 000000000..1d46e714c --- /dev/null +++ b/gcc-4.4.0/gcc/ada/s-tpopsp-solaris.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 -- +-- <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 is a version for Solaris native threads + +separate (System.Task_Primitives.Operations) +package body Specific is + + ---------------- + -- Initialize -- + ---------------- + + procedure Initialize (Environment_Task : Task_Id) is + pragma Unreferenced (Environment_Task); + Result : Interfaces.C.int; + begin + Result := thr_keycreate (ATCB_Key'Access, System.Null_Address); + pragma Assert (Result = 0); + end Initialize; + + ------------------- + -- Is_Valid_Task -- + ------------------- + + function Is_Valid_Task return Boolean is + Unknown_Task : aliased System.Address; + Result : Interfaces.C.int; + begin + Result := thr_getspecific (ATCB_Key, Unknown_Task'Unchecked_Access); + pragma Assert (Result = 0); + return Unknown_Task /= System.Null_Address; + end Is_Valid_Task; + + --------- + -- Set -- + --------- + + procedure Set (Self_Id : Task_Id) is + Result : Interfaces.C.int; + begin + Result := thr_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 run-time 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 : Interfaces.C.int; + Self_Id : aliased System.Address; + begin + Result := thr_getspecific (ATCB_Key, Self_Id'Unchecked_Access); + pragma Assert (Result = 0); + + if Self_Id = System.Null_Address then + return Register_Foreign_Thread; + else + return To_Task_Id (Self_Id); + end if; + end Self; + +end Specific; |