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annotate packages/kernel/current/include/ktypes.h @ 66:bf00f99aec69 ecos-sw-2000-02-02

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Merge from eCos master repository on 2000-02-02-19:16:44-GMT
author jlarmour
date Wed, 02 Feb 2000 19:57:02 +0000
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1 #ifndef CYGONCE_KERNEL_KTYPES_H
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2 #define CYGONCE_KERNEL_KTYPES_H
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3
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4 //==========================================================================
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5 //
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6 // ktypes.h
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7 //
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8 // Standard types used in the kernel and its interfaces
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9 //
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10 //==========================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.1 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://www.redhat.com/
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18 //
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19 // Software distributed under the License is distributed on an "AS IS"
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //==========================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): nickg from an original by hmt
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38 // Contributors: nickg
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39 // Date: 1997-09-08
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40 // Purpose: Define kernel specific types
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41 // Description: Kernel specific types
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42 // Usage: #include <cyg/kernel/ktypes.h>
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43 // ...
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44 // cyg_priority priority; // etc
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45 //
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46 //####DESCRIPTIONEND####
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47 //
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48 //==========================================================================
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49
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50 // -------------------------------------------------------------------------
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51 // Check that a configuration file is present.
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52
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53 #ifndef CYGONCE_PKGCONF_KERNEL_H
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54 #error "No Configuration file included"
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55 #endif
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56
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57 // -------------------------------------------------------------------------
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58
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59 #include <cyg/infra/cyg_type.h>
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60 #include <stddef.h> // for size_t
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61
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62 // -------------------------------------------------------------------------
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63 // Integer types:
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64
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65 typedef cyg_int32 cyg_code; // General return/error/status code
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66
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67 typedef cyg_count32 cyg_priority; // priority value
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68
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69 typedef cyg_uint32 cyg_vector; // vector number/descriptor
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70
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71 typedef cyg_uint64 cyg_tick_count; // clock tick count value
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72
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73 // -------------------------------------------------------------------------
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74 // Predefinitions of various kernel classes
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75
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76 #ifdef __cplusplus
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77
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78 class Cyg_Scheduler;
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79 class Cyg_Scheduler_Implementation;
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80
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81 class Cyg_HardwareThread;
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82 class Cyg_SchedThread;
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83 class Cyg_SchedThread_Implementation;
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84 class Cyg_Thread;
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85
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86 class Cyg_ThreadQueue;
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87 class Cyg_ThreadQueue_Implementation;
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88
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89 #endif
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90
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91
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92 // -------------------------------------------------------------------------
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93 // Class and structure conversion macros.
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94 // CYG_CLASSFROMFIELD translates a pointer to a field of a struct or
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95 // class into a pointer to the class.
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96 // CYG_OFFSETOFBASE yields the offset of a base class of a derived
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97 // class.
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98 // CYG_CLASSFROMBASE translates a pointer to a base class into a pointer
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99 // to a selected derived class. The base class object _must_ be part of
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100 // the specified derived class. This is essentially a poor mans version
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101 // of the RTTI dynamic_cast operator.
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102 // Caveat: These macros do not work for virtual base classes.
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103
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104 #define CYG_CLASSFROMFIELD(_type_,_member_,_ptr_)\
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105 ((_type_ *)((char *)(_ptr_)-((char *)&(((_type_ *)0)->_member_))))
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106
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107 #ifdef __cplusplus
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108
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109 #define CYG_OFFSETOFBASE(_type_,_base_)\
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110 ((char *)((_base_ *)((_type_ *)4)) - (char *)4)
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111
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112 # define CYG_CLASSFROMBASE(_class_,_base_,_ptr_)\
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113 ((_class_ *)((char *)(_ptr_) - CYG_OFFSETOFBASE(_class_,_base_)))
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114
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115 #endif
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116
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117 // -------------------------------------------------------------------------
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118 #endif // CYGONCE_KERNEL_KTYPES_H
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119 // EOF ktypes.h
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120