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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 Red Hat, 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.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-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 

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include 

#include           // assertion macros

#include            // 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