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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents bf00f99aec69
children d2c90368aeef
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1 #ifndef CYGONCE_KERNEL_EXCEPT_HXX
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2 #define CYGONCE_KERNEL_EXCEPT_HXX
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3
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4 //==========================================================================
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5 //
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6 // except.hxx
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7 //
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8 // Exception handling declarations
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9 //
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10 //==========================================================================
208
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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40 // at http://sources.redhat.com/ecos/ecos-license
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
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43 //==========================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): nickg
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47 // Contributors: nickg, jlarmour
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48 // Date: 1999-02-16
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49 // Purpose: Define exception interfaces
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50 // Description: The classes defined here collectively implement the
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51 // internal API used to register, manage and deliver
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52 // exceptions.
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53 // Usage: #include <cyg/kernel/thread.hxx>
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54 //
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55 //####DESCRIPTIONEND####
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56 //
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57 //==========================================================================
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58
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59 #include <cyg/kernel/ktypes.h>
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60 #include <cyg/infra/cyg_ass.h> // assertion macros
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61 #include <cyg/hal/hal_intr.h> // exception defines
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62
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63 // -------------------------------------------------------------------------
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64 // Exception handler function prototype
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65
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66 typedef void cyg_exception_handler(
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67 CYG_ADDRWORD data, // user supplied data
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68 cyg_code exception_number, // exception being raised
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69 CYG_ADDRWORD exception_info // any exception specific info
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70 );
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71
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72 // -------------------------------------------------------------------------
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73 // Exception delivery interface. This function is exported to the HAL which
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74 // invokes it for all exceptions that it is not able to handle itself.
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75
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76 externC void cyg_hal_deliver_exception( CYG_WORD code, CYG_ADDRWORD data );
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77
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78 // -------------------------------------------------------------------------
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79 // Exception control class. Depending on the configuration there is either
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80 // one of these per thread, or one for the entire system.
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81
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82 #ifdef CYGPKG_KERNEL_EXCEPTIONS
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83
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84 class Cyg_Exception_Control
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85 {
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86
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87 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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88 cyg_exception_handler *exception_handler[CYGNUM_HAL_EXCEPTION_COUNT];
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89
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90 CYG_ADDRWORD exception_data[CYGNUM_HAL_EXCEPTION_COUNT];
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91 #else
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92 cyg_exception_handler *exception_handler; // Handler function
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93
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94 CYG_ADDRWORD exception_data; // Handler data
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95 #endif
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96
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97 public:
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98
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99 Cyg_Exception_Control();
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100
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101 // Register an exception handler for either the specific exception
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102 // or for all exceptions.
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103 void register_exception(
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104 cyg_code exception_number, // exception number
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105 cyg_exception_handler handler, // handler function
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106 CYG_ADDRWORD data, // data argument
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107 cyg_exception_handler **old_handler, // handler function
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108 CYG_ADDRWORD *old_data // data argument
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109 );
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110
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111 // Remove an exception handler.
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112 void deregister_exception(
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113 cyg_code exception_number // exception number
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114 );
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115
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116 // Deliver the given exception now by invoking the appropriate
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117 // exception handler.
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118 void deliver_exception(
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119 cyg_code exception_number, // exception being raised
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120 CYG_ADDRWORD exception_info // exception specific info
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121 );
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122 };
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123
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124 #endif
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125
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126 // -------------------------------------------------------------------------
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127 #endif // ifndef CYGONCE_KERNEL_EXCEPT_HXX
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128 // EOF except.hxx