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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- I N T E R F A C E S . V X W O R K S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1999-2025, AdaCore --
-- --
-- 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 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 package provides a limited binding to the VxWorks API
-- In particular, it interfaces with the VxWorks hardware interrupt
-- facilities, allowing the use of low-latency direct-vectored interrupt
-- handlers. Note that such handlers have a variety of restrictions regarding
-- system calls and language constructs. In particular, the use of exception
-- handlers and functions returning variable-length objects cannot be used.
-- Less restrictive, but higher-latency handlers can be written using Ada
-- protected procedures, Ada 83 style interrupt entries, or by signalling
-- an Ada task from within an interrupt handler using a binary semaphore
-- as described in the VxWorks Programmer's Manual.
--
-- For complete documentation of the operations in this package, please
-- consult the VxWorks Programmer's Manual and VxWorks Reference Manual.
pragma Warnings (Off, "*foreign convention*");
pragma Warnings (Off, "*add Convention pragma*");
-- These are temporary pragmas to suppress warnings about mismatching
-- conventions, which will be a problem when we get rid of trampolines ???
with System.VxWorks;
package Interfaces.VxWorks is
pragma Preelaborate;
subtype int is Integer;
type STATUS is new int;
-- Equivalent of the C type STATUS
OK : constant STATUS := 0;
ERROR : constant STATUS := -1;
type BOOL is new int;
-- Equivalent of the C type BOOL
type Interrupt_Vector is new System.Address;
function intContext return BOOL;
-- Binding to the C routine intContext. This function returns 1 (TRUE)
-- only if the current execution state is in interrupt context.
function INUM_TO_IVEC (intNum : int) return Interrupt_Vector;
-- Equivalent to the C macro INUM_TO_IVEC used to convert an interrupt
-- number to an interrupt vector
procedure logMsg
(fmt : String; arg1, arg2, arg3, arg4, arg5, arg6 : int := 0);
-- Binding to the C routine logMsg. Note that it is the caller's
-- responsibility to ensure that fmt is a null-terminated string
-- (e.g logMsg ("Interrupt" & ASCII.NUL))
type FP_CONTEXT is private;
-- Floating point context save and restore. Handlers using floating point
-- must be bracketed with these calls. The pFpContext parameter should be
-- an object of type FP_CONTEXT that is declared local to the handler.
procedure fppRestore (pFpContext : in out FP_CONTEXT);
-- Restore floating point context
procedure fppSave (pFpContext : in out FP_CONTEXT);
-- Save floating point context
private
type FP_CONTEXT is new System.VxWorks.FP_CONTEXT;
-- Target-dependent floating point context type
pragma Import (C, intContext, "intContext");
pragma Import (C, INUM_TO_IVEC, "__gnat_inum_to_ivec");
pragma Import (C, logMsg, "logMsg");
pragma Import (C, fppRestore, "fppRestore");
pragma Import (C, fppSave, "fppSave");
end Interfaces.VxWorks;
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