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#ifndef CYGONCE_KERNEL_EXCEPT_HXX
#define CYGONCE_KERNEL_EXCEPT_HXX
//==========================================================================
//
// except.hxx
//
// Exception handling declarations
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): nickg
// Contributors: nickg, jlarmour
// Date: 1999-02-16
// Purpose: Define exception interfaces
// Description: The classes defined here collectively implement the
// internal API used to register, manage and deliver
// exceptions.
// Usage: #include <cyg/kernel/thread.hxx>
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include <cyg/kernel/ktypes.h>
#include <cyg/infra/cyg_ass.h> // assertion macros
#include <cyg/hal/hal_intr.h> // exception defines
// -------------------------------------------------------------------------
// Exception handler function prototype
typedef void cyg_exception_handler(
CYG_ADDRWORD data, // user supplied data
cyg_code exception_number, // exception being raised
CYG_ADDRWORD exception_info // any exception specific info
);
// -------------------------------------------------------------------------
// Exception delivery interface. This function is exported to the HAL which
// invokes it for all exceptions that it is not able to handle itself.
externC void cyg_hal_deliver_exception( CYG_WORD code, CYG_ADDRWORD data );
// -------------------------------------------------------------------------
// Exception control class. Depending on the configuration there is either
// one of these per thread, or one for the entire system.
#ifdef CYGPKG_KERNEL_EXCEPTIONS
class Cyg_Exception_Control
{
#ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
cyg_exception_handler *exception_handler[CYGNUM_HAL_EXCEPTION_COUNT];
CYG_ADDRWORD exception_data[CYGNUM_HAL_EXCEPTION_COUNT];
#else
cyg_exception_handler *exception_handler; // Handler function
CYG_ADDRWORD exception_data; // Handler data
#endif
public:
Cyg_Exception_Control();
// Register an exception handler for either the specific exception
// or for all exceptions.
void register_exception(
cyg_code exception_number, // exception number
cyg_exception_handler handler, // handler function
CYG_ADDRWORD data, // data argument
cyg_exception_handler **old_handler, // handler function
CYG_ADDRWORD *old_data // data argument
);
// Remove an exception handler.
void deregister_exception(
cyg_code exception_number // exception number
);
// Deliver the given exception now by invoking the appropriate
// exception handler.
void deliver_exception(
cyg_code exception_number, // exception being raised
CYG_ADDRWORD exception_info // exception specific info
);
};
#endif
// -------------------------------------------------------------------------
#endif // ifndef CYGONCE_KERNEL_EXCEPT_HXX
// EOF except.hxx
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