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/s-intman.ads | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 gcc/ada/s-intman.ads (limited to 'gcc/ada/s-intman.ads') diff --git a/gcc/ada/s-intman.ads b/gcc/ada/s-intman.ads new file mode 100644 index 000000000..5f3f4d500 --- /dev/null +++ b/gcc/ada/s-intman.ads @@ -0,0 +1,111 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T -- +-- -- +-- S p e c -- +-- -- +-- 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 package encapsulates and centralizes information about all uses of +-- interrupts (or signals), including the target-dependent mapping of +-- interrupts (or signals) to exceptions. + +-- Unlike the original design, System.Interrupt_Management can only be used +-- for tasking systems. + +-- PLEASE DO NOT put any subprogram declarations with arguments of type +-- Interrupt_ID into the visible part of this package. The type Interrupt_ID +-- is used to derive the type in Ada.Interrupts, and adding more operations +-- to that type would be illegal according to the Ada Reference Manual. This +-- is the reason why the signals sets are implemented using visible arrays +-- rather than functions. + +with System.OS_Interface; + +with Interfaces.C; + +package System.Interrupt_Management is + pragma Preelaborate; + + type Interrupt_Mask is limited private; + + type Interrupt_ID is new Interfaces.C.int + range 0 .. System.OS_Interface.Max_Interrupt; + + type Interrupt_Set is array (Interrupt_ID) of Boolean; + + -- The following objects serve as constants, but are initialized in the + -- body to aid portability. This permits us to use more portable names for + -- interrupts, where distinct names may map to the same interrupt ID + -- value. + + -- For example, suppose SIGRARE is a signal that is not defined on all + -- systems, but is always reserved when it is defined. If we have the + -- convention that ID zero is not used for any "real" signals, and SIGRARE + -- = 0 when SIGRARE is not one of the locally supported signals, we can + -- write: + -- Reserved (SIGRARE) := True; + -- and the initialization code will be portable. + + Abort_Task_Interrupt : Interrupt_ID; + -- The interrupt that is used to implement task abort if an interrupt is + -- used for that purpose. This is one of the reserved interrupts. + + Keep_Unmasked : Interrupt_Set := (others => False); + -- Keep_Unmasked (I) is true iff the interrupt I is one that must that + -- must be kept unmasked at all times, except (perhaps) for short critical + -- sections. This includes interrupts that are mapped to exceptions (see + -- System.Interrupt_Exceptions.Is_Exception), but may also include + -- interrupts (e.g. timer) that need to be kept unmasked for other + -- reasons. Where interrupts are implemented as OS signals, and signal + -- masking is per-task, the interrupt should be unmasked in ALL TASKS. + + Reserve : Interrupt_Set := (others => False); + -- Reserve (I) is true iff the interrupt I is one that cannot be permitted + -- to be attached to a user handler. The possible reasons are many. For + -- example, it may be mapped to an exception used to implement task abort, + -- or used to implement time delays. + + procedure Initialize; + -- Initialize the various variables defined in this package. This procedure + -- must be called before accessing any object from this package, and can be + -- called multiple times. + +private + type Interrupt_Mask is new System.OS_Interface.sigset_t; + -- In some implementations Interrupt_Mask is represented as a linked list + + procedure Adjust_Context_For_Raise + (Signo : System.OS_Interface.Signal; + Ucontext : System.Address); + pragma Import + (C, Adjust_Context_For_Raise, "__gnat_adjust_context_for_raise"); + -- Target specific hook performing adjustments to the signal's machine + -- context, to be called before an exception may be raised from a signal + -- handler. This service is provided by init.c, together with the + -- non-tasking signal handler. + +end System.Interrupt_Management; -- cgit v1.2.3