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annotate gsm-fw/riviera/support/exception.h @ 270:d1388095ab27

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doc/RVTMUX write-up
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Thu, 06 Feb 2014 09:54:02 +0000
parents afceeeb2cba1
children
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1 /*
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2 ******************************
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3 *
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4 *
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5 * Initialial version: Laurent Deniau, Laurent.Deniau@cern.ch
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6 *
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7 * For more information, please see the paper:
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8 * http://cern.ch/Laurent.Deniau/html/oopc/exception.html
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9 *
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10 * -----------------------------------------------------------
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11 *
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12 * Strong rework and adaption to riviera by Christophe Favergeon
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13 *
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14 ******************************
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15 */
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16
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17 #ifndef RVF_EXCEPTION_H
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18 #define RVF_EXCEPTION_H
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19
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20 #include "../rvf/rvf_api.h"
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21 #include "../rvf/rvf_target.h"
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22
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23 #include <string.h>
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24
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25
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26
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27 //#ifndef __STDC__
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28 //# error "exception.h needs ISO C compiler to work properly"
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29 //#endif
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30
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31 #include <setjmp.h>
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32
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33 typedef enum K_RVF_EXCEPTIONS { E_invalid=1, E_not_enough_memory,E_unknown } T_RVF_EXCEPTIONS;
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34
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35 typedef void (*T_RVF_RELEASE_PROTECTED_POINTER)(void *p);
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36
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37 /*
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38 choose context savings
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39 */
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40
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41 #define rvf_save_context_buffer_(context) setjmp(context)
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42 #define rvf_restore_context_buffer_(context, val) longjmp(context, val)
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43
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44 /*
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45 some hidden types used to handle exceptions
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46 */
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47
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48 /* type of stack of protected pointer */
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49 struct _protectedPtr_ {
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50 struct _protectedPtr_ *next;
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51 struct _protectedPtr_ *previous;
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52 void *ptr;
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53 T_RVF_RELEASE_PROTECTED_POINTER func;
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54 };
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55
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56 /* type of stack of exception */
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57 struct _exceptionContext_ {
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58 struct _exceptionContext_ *next;
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59 struct _protectedPtr_ *stack;
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60 jmp_buf context;
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61 };
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62
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63 extern struct _exceptionContext_ *const _returnExceptionContext_[MAX_RVF_TASKS];
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64 extern struct _exceptionContext_ *_currentExceptionContext_[MAX_RVF_TASKS];
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65
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66 /* exception keywords */
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67 #define try \
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68 do { \
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69 struct _exceptionContext_ _localExceptionContext_ ;\
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70 memset(&_localExceptionContext_,0,sizeof(struct _exceptionContext_));\
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71 _localExceptionContext_.next=_currentExceptionContext_[rvf_get_taskid()];\
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72 _currentExceptionContext_[rvf_get_taskid()] = &_localExceptionContext_; \
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73 do { \
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74 int const exception = \
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75 rvf_save_context_buffer_(_currentExceptionContext_[rvf_get_taskid()]->context); \
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76 if (!exception) {
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77
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78 #define catch(except) \
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79 } else if ((int)(except) == exception) { \
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80 _currentExceptionContext_[rvf_get_taskid()] = _currentExceptionContext_[rvf_get_taskid()]->next;
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81
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82 #define catch_any \
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83 } else { \
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84 _currentExceptionContext_[rvf_get_taskid()] = _currentExceptionContext_[rvf_get_taskid()]->next;
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85
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86 #define endtry \
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87 } \
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88 } while(0); \
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89 if (_currentExceptionContext_[rvf_get_taskid()] == &_localExceptionContext_) { \
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90 rvf_forget_protected_ptr();\
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91 _currentExceptionContext_[rvf_get_taskid()] = _currentExceptionContext_[rvf_get_taskid()]->next; \
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92 } \
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93 } while(0)
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94
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95 #define rethrow throw(exception)
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96 #define break_try break
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97
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98 /*
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99 #define return_try(...) \
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100 do { \
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101 _currentExceptionContext_ = _returnExceptionContext_; \
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102 return __VA_ARGS__; \
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103 } while(0)
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104 */
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105
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106 #define throw(except) _exceptionThrow_((int)(except))
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107
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108
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109 /*
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110 extern declarations
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111 */
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112
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113 extern void _exceptionThrow_(int except);
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114
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115 extern void rvf_forget_protected_ptr();
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116 extern void rvf_protect_pointer(T_RVF_MB_ID mb_id,void *p,T_RVF_RELEASE_PROTECTED_POINTER func);
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117
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118 #define RVF_PROTECT(bank,p) rvf_protect_pointer(bank,p,(T_RVF_RELEASE_PROTECTED_POINTER)rvf_free_buf)
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119
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120 #define THROW_IF_ERROR(err) if (err!=0) throw(E_unknown)
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121 #define THROW_IF_NULL(p) if (p==NULL) throw(E_not_enough_memory)
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122 #define THROW_IF_YELLOW(b,p) if ((p==NULL) || (rvf_get_mb_status(b)==RVF_YELLOW)) throw(E_not_enough_memory)
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123 #endif