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annotate packages/kernel/current/src/instrmnt/meminst.cxx @ 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
parents c38311975d4f
children 4c750ce71ae3
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1 //==========================================================================
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2 //
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3 // instrmnt/meminst.cxx
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4 //
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5 // Memory buffer instrumentation functions
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg
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36 // Date: 1997-10-27
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37 // Purpose: Instrumentation functions
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38 // Description: The functions in this file are implementations of the
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39 // standard instrumentation functions that place records
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40 // into a memory buffer.
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include <pkgconf/kernel.h>
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47
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48 #include <cyg/kernel/ktypes.h> // base kernel types
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49 #include <cyg/infra/cyg_trac.h> // tracing macros
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50 #include <cyg/infra/cyg_ass.h> // assertion macros
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51 #include <cyg/kernel/instrmnt.h> // instrumentation
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52
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53 #include <cyg/kernel/intr.hxx> // interrupt control
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54 #include <cyg/kernel/sched.hxx> // scheduler defines
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55
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56 #include <cyg/kernel/sched.inl> // scheduler inlines
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57 #include <cyg/kernel/clock.inl> // clock inlines
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58
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59 #ifdef CYGPKG_KERNEL_INSTRUMENT
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60
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61 // -------------------------------------------------------------------------
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62 // Instrumentation record.
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63
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64 struct Instrument_Record
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65 {
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66 CYG_WORD16 type; // record type
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67 CYG_WORD16 thread; // current thread id
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68 CYG_WORD timestamp; // 32 bit timestamp
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69 CYG_WORD arg1; // first arg
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70 CYG_WORD arg2; // second arg
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71 };
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72
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73 // -------------------------------------------------------------------------
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74 // Buffer base and end. This buffer must be a whole number of
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75
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76 #ifdef CYGVAR_KERNEL_INSTRUMENT_EXTERNAL_BUFFER
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77
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78 externC Instrument_Record instrument_buffer[];
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79 externC cyg_uint32 instrument_buffer_size;
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80
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81 #else
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82
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83 extern "C"
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84 {
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85
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86 Instrument_Record instrument_buffer[CYGNUM_KERNEL_INSTRUMENT_BUFFER_SIZE];
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87
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88 cyg_uint32 instrument_buffer_size = CYGNUM_KERNEL_INSTRUMENT_BUFFER_SIZE;
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89
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90 };
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91
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92 #endif
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93
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94 extern "C"
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95 {
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96
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97 #define instrument_buffer_start instrument_buffer[0]
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98 #define instrument_buffer_end instrument_buffer[instrument_buffer_size]
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99
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100 extern "C"
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101 {
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102 Instrument_Record *instrument_buffer_pointer = &instrument_buffer_start;
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103 };
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104
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105 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS
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106
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107 // This array contains a 32 bit word for each event class. The
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108 // bits in the word correspond to events. By setting or clearing
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109 // the appropriate bit, the selected instrumentation event may
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110 // be enabled or disabled dynamically.
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111
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112 cyg_uint32 instrument_flags[(CYG_INSTRUMENT_CLASS_MAX>>8)+1];
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113
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114 #endif
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115
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116 };
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117
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118 // -------------------------------------------------------------------------
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119
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120 void cyg_instrument( cyg_uint32 type, CYG_ADDRWORD arg1, CYG_ADDRWORD arg2 )
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121 {
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122
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123 cyg_uint32 old_ints;
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124
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125 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS
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126
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127 cyg_ucount8 cl = (type>>8)&0xff;
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128 cyg_ucount8 event = type&0xff;
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129
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130 if( instrument_flags[cl] & (1<<event) )
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131 #endif
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132 {
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133 HAL_DISABLE_INTERRUPTS(old_ints);
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134
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135 Instrument_Record *p = instrument_buffer_pointer;
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136 Cyg_Thread *t = Cyg_Scheduler::get_current_thread();
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137 p->type = type;
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138 p->thread = (t==0)?0xFFFF:t->get_unique_id();
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139 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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140 // p->timestamp = Cyg_Clock::real_time_clock->current_value_lo();
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141 HAL_CLOCK_READ( &p->timestamp );
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142 #else
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143 p->timestamp = 0;
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144 #endif
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145 p->arg1 = arg1;
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146 p->arg2 = arg2;
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147
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148 p++;
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149 #ifdef CYGDBG_KERNEL_INSTRUMENT_BUFFER_WRAP
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150 if( p == &instrument_buffer_end )
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151 instrument_buffer_pointer = &instrument_buffer_start;
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152 else instrument_buffer_pointer = p;
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153 #else
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154 // when not wrapping, just continue to put further entries
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155 // in the last slot.
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156 if( p != &instrument_buffer_end )
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157 instrument_buffer_pointer = p;
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158 #endif
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159 HAL_RESTORE_INTERRUPTS(old_ints);
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160 }
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161
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162 return;
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163 }
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164
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165 // -------------------------------------------------------------------------
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166 // Functions to enable and disable selected instrumentation events
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167 // when the flags are enabled.
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168
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169 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS
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170
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171 externC void cyg_instrument_enable( cyg_uint32 cl, cyg_uint32 event)
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172 {
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173 if( 0 != event )
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174 instrument_flags[cl>>8] |= 1<<event;
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175 else
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176 instrument_flags[cl>>8] = ~0;
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177 }
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178
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179 externC void cyg_instrument_disable( cyg_uint32 cl, cyg_uint32 event)
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180 {
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181 if( 0 != event )
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182 instrument_flags[cl>>8] &= ~(1<<event);
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183 else
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184 instrument_flags[cl>>8] = 0;
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185
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186 }
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187
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188 #endif
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189
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190 // -------------------------------------------------------------------------
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191
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192 #endif // CYGPKG_KERNEL_INSTRUMENT
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193
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194 // EOF instrmnt/null.cxx