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annotate Modules/bsddb.h @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b103cc65e53d
children 83fd64c97296
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1 /*----------------------------------------------------------------------
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2 Copyright (c) 1999-2001, Digital Creations, Fredericksburg, VA, USA
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3 and Andrew Kuchling. All rights reserved.
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4
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5 Redistribution and use in source and binary forms, with or without
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6 modification, are permitted provided that the following conditions are
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7 met:
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8
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9 o Redistributions of source code must retain the above copyright
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10 notice, this list of conditions, and the disclaimer that follows.
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12 o Redistributions in binary form must reproduce the above copyright
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13 notice, this list of conditions, and the following disclaimer in
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14 the documentation and/or other materials provided with the
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15 distribution.
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17 o Neither the name of Digital Creations nor the names of its
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18 contributors may be used to endorse or promote products derived
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19 from this software without specific prior written permission.
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21 THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS AND CONTRIBUTORS *AS
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22 IS* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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23 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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24 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL
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25 CREATIONS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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26 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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27 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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28 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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29 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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30 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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31 USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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32 DAMAGE.
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33 ------------------------------------------------------------------------*/
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34
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36 /*
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37 * Handwritten code to wrap version 3.x of the Berkeley DB library,
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38 * written to replace a SWIG-generated file. It has since been updated
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39 * to compile with Berkeley DB versions 3.2 through 4.2.
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40 *
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41 * This module was started by Andrew Kuchling to remove the dependency
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42 * on SWIG in a package by Gregory P. Smith who based his work on a
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43 * similar package by Robin Dunn <robin@alldunn.com> which wrapped
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44 * Berkeley DB 2.7.x.
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45 *
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46 * Development of this module then returned full circle back to Robin Dunn
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47 * who worked on behalf of Digital Creations to complete the wrapping of
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48 * the DB 3.x API and to build a solid unit test suite. Robin has
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49 * since gone onto other projects (wxPython).
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50 *
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51 * Gregory P. Smith <greg@krypto.org> is once again the maintainer.
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52 *
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53 * Use the pybsddb-users@lists.sf.net mailing list for all questions.
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54 * Things can change faster than the header of this file is updated. This
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55 * file is shared with the PyBSDDB project at SourceForge:
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56 *
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57 * http://pybsddb.sf.net
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58 *
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59 * This file should remain backward compatible with Python 2.1, but see PEP
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60 * 291 for the most current backward compatibility requirements:
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61 *
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62 * http://www.python.org/peps/pep-0291.html
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63 *
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64 * This module contains 6 types:
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65 *
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66 * DB (Database)
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67 * DBCursor (Database Cursor)
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68 * DBEnv (database environment)
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69 * DBTxn (An explicit database transaction)
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70 * DBLock (A lock handle)
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71 * DBSequence (Sequence)
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72 *
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73 * New datatypes:
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74 *
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75 * DBLogCursor (Log Cursor)
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76 *
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77 */
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78
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79 /* --------------------------------------------------------------------- */
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80
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81 /*
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82 * Portions of this module, associated unit tests and build scripts are the
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83 * result of a contract with The Written Word (http://thewrittenword.com/)
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84 * Many thanks go out to them for causing me to raise the bar on quality and
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85 * functionality, resulting in a better bsddb3 package for all of us to use.
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86 *
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87 * --Robin
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88 */
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89
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90 /* --------------------------------------------------------------------- */
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91
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92 /*
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93 * Work to split it up into a separate header and to add a C API was
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94 * contributed by Duncan Grisby <duncan@tideway.com>. See here:
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95 * http://sourceforge.net/tracker/index.php?func=detail&aid=1551895&group_id=13900&atid=313900
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96 */
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97
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98 /* --------------------------------------------------------------------- */
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99
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100 #ifndef _BSDDB_H_
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101 #define _BSDDB_H_
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102
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103 #include <db.h>
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105
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106 /* 40 = 4.0, 33 = 3.3; this will break if the minor revision is > 9 */
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107 #define DBVER (DB_VERSION_MAJOR * 10 + DB_VERSION_MINOR)
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108 #if DB_VERSION_MINOR > 9
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109 #error "eek! DBVER can't handle minor versions > 9"
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110 #endif
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111
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112 #define PY_BSDDB_VERSION "4.8.4.2"
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113
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114 /* Python object definitions */
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115
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116 struct behaviourFlags {
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117 /* What is the default behaviour when DB->get or DBCursor->get returns a
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118 DB_NOTFOUND || DB_KEYEMPTY error? Return None or raise an exception? */
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119 unsigned int getReturnsNone : 1;
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120 /* What is the default behaviour for DBCursor.set* methods when DBCursor->get
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121 * returns a DB_NOTFOUND || DB_KEYEMPTY error? Return None or raise? */
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122 unsigned int cursorSetReturnsNone : 1;
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123 };
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124
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125
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126
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127 struct DBObject; /* Forward declaration */
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128 struct DBCursorObject; /* Forward declaration */
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129 struct DBLogCursorObject; /* Forward declaration */
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130 struct DBTxnObject; /* Forward declaration */
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131 struct DBSequenceObject; /* Forward declaration */
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132
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133 typedef struct {
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134 PyObject_HEAD
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135 DB_ENV* db_env;
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136 u_int32_t flags; /* saved flags from open() */
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137 int closed;
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138 struct behaviourFlags moduleFlags;
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139 PyObject* event_notifyCallback;
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140 struct DBObject *children_dbs;
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141 struct DBTxnObject *children_txns;
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142 struct DBLogCursorObject *children_logcursors;
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143 PyObject *private_obj;
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144 PyObject *rep_transport;
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145 PyObject *in_weakreflist; /* List of weak references */
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146 } DBEnvObject;
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147
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148 typedef struct DBObject {
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149 PyObject_HEAD
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150 DB* db;
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151 DBEnvObject* myenvobj; /* PyObject containing the DB_ENV */
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152 u_int32_t flags; /* saved flags from open() */
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153 u_int32_t setflags; /* saved flags from set_flags() */
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154 struct behaviourFlags moduleFlags;
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155 struct DBTxnObject *txn;
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156 struct DBCursorObject *children_cursors;
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157 #if (DBVER >=43)
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158 struct DBSequenceObject *children_sequences;
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159 #endif
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160 struct DBObject **sibling_prev_p;
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161 struct DBObject *sibling_next;
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162 struct DBObject **sibling_prev_p_txn;
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163 struct DBObject *sibling_next_txn;
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164 PyObject* associateCallback;
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165 PyObject* btCompareCallback;
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166 int primaryDBType;
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167 PyObject *private_obj;
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168 PyObject *in_weakreflist; /* List of weak references */
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169 } DBObject;
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170
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171
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172 typedef struct DBCursorObject {
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173 PyObject_HEAD
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174 DBC* dbc;
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175 struct DBCursorObject **sibling_prev_p;
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176 struct DBCursorObject *sibling_next;
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177 struct DBCursorObject **sibling_prev_p_txn;
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178 struct DBCursorObject *sibling_next_txn;
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179 DBObject* mydb;
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180 struct DBTxnObject *txn;
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181 PyObject *in_weakreflist; /* List of weak references */
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182 } DBCursorObject;
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183
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184
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185 typedef struct DBTxnObject {
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186 PyObject_HEAD
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187 DB_TXN* txn;
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188 DBEnvObject* env;
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189 int flag_prepare;
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190 struct DBTxnObject *parent_txn;
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191 struct DBTxnObject **sibling_prev_p;
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192 struct DBTxnObject *sibling_next;
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193 struct DBTxnObject *children_txns;
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194 struct DBObject *children_dbs;
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195 struct DBSequenceObject *children_sequences;
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196 struct DBCursorObject *children_cursors;
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197 PyObject *in_weakreflist; /* List of weak references */
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198 } DBTxnObject;
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199
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200
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201 typedef struct DBLogCursorObject {
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202 PyObject_HEAD
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203 DB_LOGC* logc;
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204 DBEnvObject* env;
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205 struct DBLogCursorObject **sibling_prev_p;
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206 struct DBLogCursorObject *sibling_next;
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207 PyObject *in_weakreflist; /* List of weak references */
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208 } DBLogCursorObject;
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209
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210
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211 typedef struct {
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212 PyObject_HEAD
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213 DB_LOCK lock;
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214 int lock_initialized; /* Signal if we actually have a lock */
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215 PyObject *in_weakreflist; /* List of weak references */
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216 } DBLockObject;
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217
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218
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219 #if (DBVER >= 43)
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220 typedef struct DBSequenceObject {
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221 PyObject_HEAD
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222 DB_SEQUENCE* sequence;
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223 DBObject* mydb;
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224 struct DBTxnObject *txn;
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225 struct DBSequenceObject **sibling_prev_p;
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226 struct DBSequenceObject *sibling_next;
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227 struct DBSequenceObject **sibling_prev_p_txn;
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228 struct DBSequenceObject *sibling_next_txn;
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229 PyObject *in_weakreflist; /* List of weak references */
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230 } DBSequenceObject;
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231 #endif
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232
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233
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234 /* API structure for use by C code */
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235
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236 /* To access the structure from an external module, use code like the
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237 following (error checking missed out for clarity):
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238
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239 // If you are using Python before 3.2:
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240 BSDDB_api* bsddb_api;
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241 PyObject* mod;
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242 PyObject* cobj;
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243
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244 mod = PyImport_ImportModule("bsddb._bsddb");
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245 // Use "bsddb3._pybsddb" if you're using the standalone pybsddb add-on.
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246 cobj = PyObject_GetAttrString(mod, "api");
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247 api = (BSDDB_api*)PyCObject_AsVoidPtr(cobj);
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248 Py_DECREF(cobj);
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249 Py_DECREF(mod);
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250
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251
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252 // If you are using Python 3.2 or up:
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253 BSDDB_api* bsddb_api;
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254
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255 // Use "bsddb3._pybsddb.api" if you're using
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256 // the standalone pybsddb add-on.
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257 bsddb_api = (void **)PyCapsule_Import("bsddb._bsddb.api", 1);
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258
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259
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260 The structure's members must not be changed.
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261 */
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262
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263 typedef struct {
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264 /* Type objects */
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265 PyTypeObject* db_type;
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266 PyTypeObject* dbcursor_type;
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267 PyTypeObject* dblogcursor_type;
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268 PyTypeObject* dbenv_type;
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269 PyTypeObject* dbtxn_type;
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270 PyTypeObject* dblock_type;
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271 #if (DBVER >= 43)
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272 PyTypeObject* dbsequence_type;
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273 #endif
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274
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275 /* Functions */
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276 int (*makeDBError)(int err);
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277 } BSDDB_api;
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278
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279
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280 #ifndef COMPILING_BSDDB_C
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281
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282 /* If not inside _bsddb.c, define type check macros that use the api
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283 structure. The calling code must have a value named bsddb_api
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284 pointing to the api structure.
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285 */
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286
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287 #define DBObject_Check(v) ((v)->ob_type == bsddb_api->db_type)
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288 #define DBCursorObject_Check(v) ((v)->ob_type == bsddb_api->dbcursor_type)
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289 #define DBEnvObject_Check(v) ((v)->ob_type == bsddb_api->dbenv_type)
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290 #define DBTxnObject_Check(v) ((v)->ob_type == bsddb_api->dbtxn_type)
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291 #define DBLockObject_Check(v) ((v)->ob_type == bsddb_api->dblock_type)
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292 #if (DBVER >= 43)
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293 #define DBSequenceObject_Check(v) ((v)->ob_type == bsddb_api->dbsequence_type)
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294 #endif
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295
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296 #endif /* COMPILING_BSDDB_C */
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297
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298
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299 #endif /* _BSDDB_H_ */