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annotate packages/net/snmp/lib/current/include/mt_support.h @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 74dbf4c3f2e1
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1 //==========================================================================
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2 //
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3 // ./lib/current/include/mt_support.h
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4 //
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5 //
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6 //==========================================================================
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7 //####ECOSGPLCOPYRIGHTBEGIN####
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8 // -------------------------------------------
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9 // This file is part of eCos, the Embedded Configurable Operating System.
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10 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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11 //
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12 // eCos is free software; you can redistribute it and/or modify it under
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13 // the terms of the GNU General Public License as published by the Free
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14 // Software Foundation; either version 2 or (at your option) any later version.
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15 //
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16 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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17 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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18 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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19 // for more details.
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20 //
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21 // You should have received a copy of the GNU General Public License along
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22 // with eCos; if not, write to the Free Software Foundation, Inc.,
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23 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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24 //
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25 // As a special exception, if other files instantiate templates or use macros
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26 // or inline functions from this file, or you compile this file and link it
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27 // with other works to produce a work based on this file, this file does not
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28 // by itself cause the resulting work to be covered by the GNU General Public
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29 // License. However the source code for this file must still be made available
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30 // in accordance with section (3) of the GNU General Public License.
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31 //
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32 // This exception does not invalidate any other reasons why a work based on
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33 // this file might be covered by the GNU General Public License.
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34 //
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35 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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36 // at http://sources.redhat.com/ecos/ecos-license/
208
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37 // -------------------------------------------
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38 //####ECOSGPLCOPYRIGHTEND####
103
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39 //####UCDSNMPCOPYRIGHTBEGIN####
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40 //
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41 // -------------------------------------------
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42 //
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43 // Portions of this software may have been derived from the UCD-SNMP
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44 // project, <http://ucd-snmp.ucdavis.edu/> from the University of
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45 // California at Davis, which was originally based on the Carnegie Mellon
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46 // University SNMP implementation. Portions of this software are therefore
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47 // covered by the appropriate copyright disclaimers included herein.
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48 //
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49 // The release used was version 4.1.2 of May 2000. "ucd-snmp-4.1.2"
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50 // -------------------------------------------
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51 //
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52 //####UCDSNMPCOPYRIGHTEND####
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53 //==========================================================================
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54 //#####DESCRIPTIONBEGIN####
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55 //
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56 // Author(s): hmt
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57 // Contributors: hmt
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58 // Date: 2000-05-30
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59 // Purpose: Port of UCD-SNMP distribution to eCos.
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60 // Description:
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61 //
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62 //
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63 //####DESCRIPTIONEND####
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64 //
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65 //==========================================================================
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66 /********************************************************************
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67 Copyright 1989, 1991, 1992 by Carnegie Mellon University
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68
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69 Derivative Work -
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70 Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
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71
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72 All Rights Reserved
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73
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74 Permission to use, copy, modify and distribute this software and its
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75 documentation for any purpose and without fee is hereby granted,
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76 provided that the above copyright notice appears in all copies and
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77 that both that copyright notice and this permission notice appear in
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78 supporting documentation, and that the name of CMU and The Regents of
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79 the University of California not be used in advertising or publicity
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80 pertaining to distribution of the software without specific written
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81 permission.
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82
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83 CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
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84 WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
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85 WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CMU OR
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86 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
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87 INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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88 FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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89 CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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90 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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91 *********************************************************************/
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92
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93 /* mt_support.h - multi-thread resource locking support declarations */
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94 /*
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95 * Author: Markku Laukkanen
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96 * Created: 6-Sep-1999
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97 * History:
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98 * 8-Sep-1999 M. Slifcak method names changed;
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99 * use array of resource locking structures.
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100 */
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101
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102 #ifndef MT_SUPPORT_H
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103 #define MT_SUPPORT_H
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104
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105 #ifdef __cplusplus
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106 extern "C" {
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107 #endif
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108
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109 /* Lock group identifiers */
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110
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111 #define MT_LIBRARY_ID 0
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112 #define MT_APPLICATION_ID 1
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113 #define MT_TOKEN_ID 2
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114
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115 #define MT_MAX_IDS 3 /* one greater than last from above */
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116 #define MT_MAX_SUBIDS 10
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117
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118
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119 /* Lock resource identifiers for library resources */
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120
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121 #define MT_LIB_NONE 0
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122 #define MT_LIB_SESSION 1
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123 #define MT_LIB_REQUESTID 2
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124 #define MT_LIB_MESSAGEID 3
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125 #define MT_LIB_SESSIONID 4
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126 #define MT_LIB_TRANSID 5
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127
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128 #define MT_LIB_MAXIMUM 6 /* must be one greater than the last one */
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129
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130
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131 #ifdef _REENTRANT
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132
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133 #if HAVE_PTHREAD_H
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134
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135 #include <pthread.h>
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136 typedef pthread_mutex_t mutex_type;
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137 #ifdef pthread_mutexattr_default
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138 #define MT_MUTEX_INIT_DEFAULT pthread_mutexattr_default
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139 #else
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140 #define MT_MUTEX_INIT_DEFAULT 0
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141 #endif
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142
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143 #elif defined(WIN32) || defined(cygwin)
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144
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145 #include <windows.h>
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146 typedef CRITICAL_SECTION mutex_type;
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147
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148 #else
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149 error "There is no re-entrant support as defined."
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150 #endif
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151
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152 int snmp_res_init(void);
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153 int snmp_res_lock(int groupID, int resourceID);
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154 int snmp_res_unlock(int groupID, int resourceID);
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155 int snmp_res_destroy_mutex(int groupID, int resourceID);
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156
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157 #else /* !_REENTRANT */
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158
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159 #define snmp_res_init() do {} while (0)
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160 #define snmp_res_lock(x,y) do {} while (0)
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161 #define snmp_res_unlock(x,y) do {} while (0)
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162 #define snmp_res_destroy_mutex(x,y) do {} while (0)
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163
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164 #endif /* !_REENTRANT */
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165
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166 #ifdef __cplusplus
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167 }
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168 #endif
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169
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170 #endif /* MT_SUPPORT_H */
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171