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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 Cygnus eCos Public License |
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15 // Version 1.0 (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://sourceware.cygnus.com/ecos |
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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 Cygnus Operating System, released |
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25 // September 30, 1998. |
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26 // |
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27 // The Initial Developer of the Original Code is Cygnus. Portions created |
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28 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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29 // ------------------------------------------- |
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30 // |
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31 //####COPYRIGHTEND#### |
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32 //========================================================================== |
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33 //#####DESCRIPTIONBEGIN#### |
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34 // |
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35 // Author(s): nickg from an original by hmt |
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36 // Contributors: nickg |
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37 // Date: 1997-09-08 |
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38 // Purpose: Define kernel specific types |
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39 // Description: Kernel specific types |
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40 // Usage: #include <cyg/kernel/ktypes.h> |
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41 // ... |
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42 // cyg_priority priority; // etc |
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43 // |
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44 //####DESCRIPTIONEND#### |
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45 // |
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46 //========================================================================== |
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47 |
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48 // ------------------------------------------------------------------------- |
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49 // Check that a configuration file is present. |
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50 |
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51 #ifndef CYGONCE_PKGCONF_KERNEL_H |
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52 #error "No Configuration file included" |
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53 #endif |
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54 |
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55 // ------------------------------------------------------------------------- |
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56 |
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57 #include <cyg/infra/cyg_type.h> |
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58 #include <stddef.h> // for size_t |
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59 |
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60 // ------------------------------------------------------------------------- |
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61 // Integer types: |
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62 |
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63 typedef cyg_int32 cyg_code; // General return/error/status code |
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64 |
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65 typedef cyg_count32 cyg_priority; // priority value |
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66 |
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67 typedef cyg_uint32 cyg_vector; // vector number/descriptor |
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68 |
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69 typedef cyg_uint64 cyg_tick_count; // clock tick count value |
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70 |
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71 // ------------------------------------------------------------------------- |
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72 // Predefinitions of various kernel classes |
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73 |
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74 #ifdef __cplusplus |
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75 |
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76 class Cyg_Scheduler; |
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77 class Cyg_Scheduler_Implementation; |
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78 |
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79 class Cyg_HardwareThread; |
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80 class Cyg_SchedThread; |
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81 class Cyg_SchedThread_Implementation; |
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82 class Cyg_Thread; |
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83 |
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84 class Cyg_ThreadQueue; |
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85 class Cyg_ThreadQueue_Implementation; |
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86 |
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87 #endif |
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88 |
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89 |
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90 // ------------------------------------------------------------------------- |
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91 // Class and structure conversion macros. |
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92 // CYG_CLASSFROMFIELD translates a pointer to a field of a struct or |
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93 // class into a pointer to the class. |
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94 // CYG_OFFSETOFBASE yields the offset of a base class of a derived |
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95 // class. |
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96 // CYG_CLASSFROMBASE translates a pointer to a base class into a pointer |
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97 // to a selected derived class. The base class object _must_ be part of |
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98 // the specified derived class. This is essentially a poor mans version |
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99 // of the RTTI dynamic_cast operator. |
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100 // Caveat: These macros do not work for virtual base classes. |
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101 |
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102 #define CYG_CLASSFROMFIELD(_type_,_member_,_ptr_)\ |
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103 ((_type_ *)((char *)(_ptr_)-((char *)&(((_type_ *)0)->_member_)))) |
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104 |
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105 #ifdef __cplusplus |
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106 |
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107 #define CYG_OFFSETOFBASE(_type_,_base_)\ |
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108 ((char *)((_base_ *)((_type_ *)4)) - (char *)4) |
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109 |
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110 # define CYG_CLASSFROMBASE(_class_,_base_,_ptr_)\ |
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111 ((_class_ *)((char *)(_ptr_) - CYG_OFFSETOFBASE(_class_,_base_))) |
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112 |
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113 #endif |
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114 |
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115 // ------------------------------------------------------------------------- |
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116 #endif // CYGONCE_KERNEL_KTYPES_H |
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117 // EOF ktypes.h |
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118 |
