------------------------------------------------------------------------------ -- -- -- 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) 1999-2024, 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 -- -- . -- -- -- -- 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;