Mercurial > cpython-lru_cache-weakref

annotate Lib/bsddb/__init__.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents b45868fe489c
children 751c6dd71b5e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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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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11 #
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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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16 #
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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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20 #
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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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35
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36 """Support for Berkeley DB 4.0 through 4.7 with a simple interface.
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37
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38 For the full featured object oriented interface use the bsddb.db module
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39 instead. It mirrors the Oracle Berkeley DB C API.
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40 """
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41
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42 import sys
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43 absolute_import = (sys.version_info[0] >= 3)
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44
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45 if sys.py3kwarning:
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46 import warnings
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47 warnings.warnpy3k("in 3.x, bsddb has been removed; "
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48 "please use the pybsddb project instead",
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49 DeprecationWarning, 2)
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50
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51 try:
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52 if __name__ == 'bsddb3':
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53 # import _pybsddb binary as it should be the more recent version from
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54 # a standalone pybsddb addon package than the version included with
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55 # python as bsddb._bsddb.
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56 if absolute_import :
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57 # Because this syntaxis is not valid before Python 2.5
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58 exec("from . import _pybsddb")
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59 else :
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60 import _pybsddb
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61 _bsddb = _pybsddb
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62 from bsddb3.dbutils import DeadlockWrap as _DeadlockWrap
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63 else:
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64 import _bsddb
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65 from bsddb.dbutils import DeadlockWrap as _DeadlockWrap
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66 except ImportError:
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67 # Remove ourselves from sys.modules
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68 import sys
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69 del sys.modules[__name__]
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70 raise
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71
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72 # bsddb3 calls it db, but provide _db for backwards compatibility
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73 db = _db = _bsddb
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74 __version__ = db.__version__
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75
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76 error = db.DBError # So bsddb.error will mean something...
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77
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78 #----------------------------------------------------------------------
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79
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80 import sys, os
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81
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82 from weakref import ref
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83
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84 if sys.version_info[0:2] <= (2, 5) :
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85 import UserDict
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86 MutableMapping = UserDict.DictMixin
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87 else :
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88 import collections
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89 MutableMapping = collections.MutableMapping
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90
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91 class _iter_mixin(MutableMapping):
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92 def _make_iter_cursor(self):
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93 cur = _DeadlockWrap(self.db.cursor)
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94 key = id(cur)
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95 self._cursor_refs[key] = ref(cur, self._gen_cref_cleaner(key))
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96 return cur
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97
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98 def _gen_cref_cleaner(self, key):
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99 # use generate the function for the weakref callback here
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100 # to ensure that we do not hold a strict reference to cur
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101 # in the callback.
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102 return lambda ref: self._cursor_refs.pop(key, None)
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103
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104 def __iter__(self):
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105 self._kill_iteration = False
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106 self._in_iter += 1
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107 try:
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108 try:
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109 cur = self._make_iter_cursor()
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110
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111 # FIXME-20031102-greg: race condition. cursor could
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112 # be closed by another thread before this call.
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113
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114 # since we're only returning keys, we call the cursor
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115 # methods with flags=0, dlen=0, dofs=0
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116 key = _DeadlockWrap(cur.first, 0,0,0)[0]
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117 yield key
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118
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119 next = getattr(cur, "next")
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120 while 1:
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121 try:
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122 key = _DeadlockWrap(next, 0,0,0)[0]
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123 yield key
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124 except _bsddb.DBCursorClosedError:
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125 if self._kill_iteration:
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126 raise RuntimeError('Database changed size '
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127 'during iteration.')
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128 cur = self._make_iter_cursor()
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129 # FIXME-20031101-greg: race condition. cursor could
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130 # be closed by another thread before this call.
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131 _DeadlockWrap(cur.set, key,0,0,0)
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132 next = getattr(cur, "next")
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133 except _bsddb.DBNotFoundError:
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134 pass
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135 except _bsddb.DBCursorClosedError:
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136 # the database was modified during iteration. abort.
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137 pass
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138 # When Python 2.3 not supported in bsddb3, we can change this to "finally"
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139 except :
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140 self._in_iter -= 1
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141 raise
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142
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143 self._in_iter -= 1
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144
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145 def iteritems(self):
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146 if not self.db:
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147 return
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148 self._kill_iteration = False
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149 self._in_iter += 1
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150 try:
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151 try:
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152 cur = self._make_iter_cursor()
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153
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154 # FIXME-20031102-greg: race condition. cursor could
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155 # be closed by another thread before this call.
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156
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157 kv = _DeadlockWrap(cur.first)
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158 key = kv[0]
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159 yield kv
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160
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161 next = getattr(cur, "next")
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162 while 1:
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163 try:
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164 kv = _DeadlockWrap(next)
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165 key = kv[0]
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166 yield kv
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167 except _bsddb.DBCursorClosedError:
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168 if self._kill_iteration:
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169 raise RuntimeError('Database changed size '
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170 'during iteration.')
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171 cur = self._make_iter_cursor()
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172 # FIXME-20031101-greg: race condition. cursor could
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173 # be closed by another thread before this call.
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174 _DeadlockWrap(cur.set, key,0,0,0)
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175 next = getattr(cur, "next")
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176 except _bsddb.DBNotFoundError:
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177 pass
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178 except _bsddb.DBCursorClosedError:
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179 # the database was modified during iteration. abort.
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180 pass
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181 # When Python 2.3 not supported in bsddb3, we can change this to "finally"
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182 except :
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183 self._in_iter -= 1
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184 raise
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185
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186 self._in_iter -= 1
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187
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188
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189 class _DBWithCursor(_iter_mixin):
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190 """
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191 A simple wrapper around DB that makes it look like the bsddbobject in
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192 the old module. It uses a cursor as needed to provide DB traversal.
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193 """
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194 def __init__(self, db):
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195 self.db = db
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196 self.db.set_get_returns_none(0)
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197
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198 # FIXME-20031101-greg: I believe there is still the potential
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199 # for deadlocks in a multithreaded environment if someone
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200 # attempts to use the any of the cursor interfaces in one
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201 # thread while doing a put or delete in another thread. The
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202 # reason is that _checkCursor and _closeCursors are not atomic
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203 # operations. Doing our own locking around self.dbc,
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204 # self.saved_dbc_key and self._cursor_refs could prevent this.
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205 # TODO: A test case demonstrating the problem needs to be written.
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206
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207 # self.dbc is a DBCursor object used to implement the
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208 # first/next/previous/last/set_location methods.
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209 self.dbc = None
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210 self.saved_dbc_key = None
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211
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212 # a collection of all DBCursor objects currently allocated
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213 # by the _iter_mixin interface.
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214 self._cursor_refs = {}
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215 self._in_iter = 0
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216 self._kill_iteration = False
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217
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218 def __del__(self):
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219 self.close()
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220
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221 def _checkCursor(self):
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222 if self.dbc is None:
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223 self.dbc = _DeadlockWrap(self.db.cursor)
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224 if self.saved_dbc_key is not None:
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225 _DeadlockWrap(self.dbc.set, self.saved_dbc_key)
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226 self.saved_dbc_key = None
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227
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228 # This method is needed for all non-cursor DB calls to avoid
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229 # Berkeley DB deadlocks (due to being opened with DB_INIT_LOCK
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230 # and DB_THREAD to be thread safe) when intermixing database
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231 # operations that use the cursor internally with those that don't.
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232 def _closeCursors(self, save=1):
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233 if self.dbc:
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234 c = self.dbc
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235 self.dbc = None
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236 if save:
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237 try:
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238 self.saved_dbc_key = _DeadlockWrap(c.current, 0,0,0)[0]
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diff changeset
239 except db.DBError:
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240 pass
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241 _DeadlockWrap(c.close)
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242 del c
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243 for cref in self._cursor_refs.values():
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diff changeset
244 c = cref()
931a58f27ebb * Use weakref's of DBCursor objects for the iterator cursors to avoid a
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diff changeset
245 if c is not None:
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246 _DeadlockWrap(c.close)
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247
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248 def _checkOpen(self):
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diff changeset
249 if self.db is None:
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250 raise error, "BSDDB object has already been closed"
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251
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diff changeset
252 def isOpen(self):
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diff changeset
253 return self.db is not None
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254
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diff changeset
255 def __len__(self):
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256 self._checkOpen()
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257 return _DeadlockWrap(lambda: len(self.db)) # len(self.db)
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258
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diff changeset
259 if sys.version_info[0:2] >= (2, 6) :
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diff changeset
260 def __repr__(self) :
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diff changeset
261 if self.isOpen() :
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diff changeset
262 return repr(dict(_DeadlockWrap(self.db.items)))
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diff changeset
263 return repr(dict())
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264
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265 def __getitem__(self, key):
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266 self._checkOpen()
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267 return _DeadlockWrap(lambda: self.db[key]) # self.db[key]
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268
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diff changeset
269 def __setitem__(self, key, value):
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270 self._checkOpen()
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271 self._closeCursors()
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272 if self._in_iter and key not in self:
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273 self._kill_iteration = True
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274 def wrapF():
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diff changeset
275 self.db[key] = value
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diff changeset
276 _DeadlockWrap(wrapF) # self.db[key] = value
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277
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diff changeset
278 def __delitem__(self, key):
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diff changeset
279 self._checkOpen()
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diff changeset
280 self._closeCursors()
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diff changeset
281 if self._in_iter and key in self:
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diff changeset
282 self._kill_iteration = True
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diff changeset
283 def wrapF():
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diff changeset
284 del self.db[key]
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diff changeset
285 _DeadlockWrap(wrapF) # del self.db[key]
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286
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
287 def close(self):
31371
f84d2bc6831d __init__.py: keep it compatible with older python (True and False == 1 and 0)
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diff changeset
288 self._closeCursors(save=0)
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diff changeset
289 if self.dbc is not None:
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diff changeset
290 _DeadlockWrap(self.dbc.close)
26280
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diff changeset
291 v = 0
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diff changeset
292 if self.db is not None:
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diff changeset
293 v = _DeadlockWrap(self.db.close)
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diff changeset
294 self.dbc = None
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diff changeset
295 self.db = None
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parents:
diff changeset
296 return v
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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diff changeset
297
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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diff changeset
298 def keys(self):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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diff changeset
299 self._checkOpen()
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diff changeset
300 return _DeadlockWrap(self.db.keys)
26280
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diff changeset
301
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
302 def has_key(self, key):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
303 self._checkOpen()
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diff changeset
304 return _DeadlockWrap(self.db.has_key, key)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
305
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
306 def set_location(self, key):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
307 self._checkOpen()
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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diff changeset
308 self._checkCursor()
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diff changeset
309 return _DeadlockWrap(self.dbc.set_range, key)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
310
48950
8c4f750661ec Improve compatibility with Python3.0 testsuite
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parents: 48054
diff changeset
311 def next(self): # Renamed by "2to3"
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
312 self._checkOpen()
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
313 self._checkCursor()
48950
8c4f750661ec Improve compatibility with Python3.0 testsuite
Jesus Cea <jcea@jcea.es>
parents: 48054
diff changeset
314 rv = _DeadlockWrap(getattr(self.dbc, "next"))
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
315 return rv
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
316
48950
8c4f750661ec Improve compatibility with Python3.0 testsuite
Jesus Cea <jcea@jcea.es>
parents: 48054
diff changeset
317 if sys.version_info[0] >= 3 : # For "2to3" conversion
8c4f750661ec Improve compatibility with Python3.0 testsuite
Jesus Cea <jcea@jcea.es>
parents: 48054
diff changeset
318 next = __next__
8c4f750661ec Improve compatibility with Python3.0 testsuite
Jesus Cea <jcea@jcea.es>
parents: 48054
diff changeset
319
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
320 def previous(self):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
321 self._checkOpen()
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
322 self._checkCursor()
38840
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diff changeset
323 rv = _DeadlockWrap(self.dbc.prev)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
324 return rv
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
325
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
326 def first(self):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
327 self._checkOpen()
42767
05fe027e2d80 Fix bug 1725856.
Gregory P. Smith <greg@mad-scientist.com>
parents: 38840
diff changeset
328 # fix 1725856: don't needlessly try to restore our cursor position
05fe027e2d80 Fix bug 1725856.
Gregory P. Smith <greg@mad-scientist.com>
parents: 38840
diff changeset
329 self.saved_dbc_key = None
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
330 self._checkCursor()
38840
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parents: 38658
diff changeset
331 rv = _DeadlockWrap(self.dbc.first)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
332 return rv
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
333
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
334 def last(self):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
335 self._checkOpen()
42767
05fe027e2d80 Fix bug 1725856.
Gregory P. Smith <greg@mad-scientist.com>
parents: 38840
diff changeset
336 # fix 1725856: don't needlessly try to restore our cursor position
05fe027e2d80 Fix bug 1725856.
Gregory P. Smith <greg@mad-scientist.com>
parents: 38840
diff changeset
337 self.saved_dbc_key = None
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
338 self._checkCursor()
38840
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parents: 38658
diff changeset
339 rv = _DeadlockWrap(self.dbc.last)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
340 return rv
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
341
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
342 def sync(self):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
343 self._checkOpen()
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diff changeset
344 return _DeadlockWrap(self.db.sync)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
345
30422
4d204fc3ad32 The previous change works much faster (one lookup per key) when
Raymond Hettinger <python@rcn.com>
parents: 30415
diff changeset
346
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
347 #----------------------------------------------------------------------
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Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
348 # Compatibility object factory functions
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
349
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
350 def hashopen(file, flag='c', mode=0666, pgsize=None, ffactor=None, nelem=None,
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
351 cachesize=None, lorder=None, hflags=0):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
352
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
353 flags = _checkflag(flag, file)
37645
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
354 e = _openDBEnv(cachesize)
30583
d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
Gregory P. Smith <greg@mad-scientist.com>
parents: 30475
diff changeset
355 d = db.DB(e)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
356 d.set_flags(hflags)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
357 if pgsize is not None: d.set_pagesize(pgsize)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
358 if lorder is not None: d.set_lorder(lorder)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
359 if ffactor is not None: d.set_h_ffactor(ffactor)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
360 if nelem is not None: d.set_h_nelem(nelem)
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
361 d.open(file, db.DB_HASH, flags, mode)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
362 return _DBWithCursor(d)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
363
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
364 #----------------------------------------------------------------------
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
365
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
366 def btopen(file, flag='c', mode=0666,
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
367 btflags=0, cachesize=None, maxkeypage=None, minkeypage=None,
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
368 pgsize=None, lorder=None):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
369
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
370 flags = _checkflag(flag, file)
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2c06588ae69e Fixes bug #1117761
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parents: 37644
diff changeset
371 e = _openDBEnv(cachesize)
30583
d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
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parents: 30475
diff changeset
372 d = db.DB(e)
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parents:
diff changeset
373 if pgsize is not None: d.set_pagesize(pgsize)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
374 if lorder is not None: d.set_lorder(lorder)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
375 d.set_flags(btflags)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
376 if minkeypage is not None: d.set_bt_minkey(minkeypage)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
377 if maxkeypage is not None: d.set_bt_maxkey(maxkeypage)
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14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
378 d.open(file, db.DB_BTREE, flags, mode)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
379 return _DBWithCursor(d)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
380
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
381 #----------------------------------------------------------------------
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
382
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
383
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
384 def rnopen(file, flag='c', mode=0666,
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
385 rnflags=0, cachesize=None, pgsize=None, lorder=None,
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
386 rlen=None, delim=None, source=None, pad=None):
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
387
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
388 flags = _checkflag(flag, file)
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2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
389 e = _openDBEnv(cachesize)
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d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
Gregory P. Smith <greg@mad-scientist.com>
parents: 30475
diff changeset
390 d = db.DB(e)
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Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
391 if pgsize is not None: d.set_pagesize(pgsize)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
392 if lorder is not None: d.set_lorder(lorder)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
393 d.set_flags(rnflags)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
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parents:
diff changeset
394 if delim is not None: d.set_re_delim(delim)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
395 if rlen is not None: d.set_re_len(rlen)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
396 if source is not None: d.set_re_source(source)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
397 if pad is not None: d.set_re_pad(pad)
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
398 d.open(file, db.DB_RECNO, flags, mode)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
399 return _DBWithCursor(d)
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
400
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
401 #----------------------------------------------------------------------
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
402
37645
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
403 def _openDBEnv(cachesize):
30583
d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
Gregory P. Smith <greg@mad-scientist.com>
parents: 30475
diff changeset
404 e = db.DBEnv()
37645
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
405 if cachesize is not None:
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
406 if cachesize >= 20480:
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
407 e.set_cachesize(0, cachesize)
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
408 else:
2c06588ae69e Fixes bug #1117761
Gregory P. Smith <greg@mad-scientist.com>
parents: 37644
diff changeset
409 raise error, "cachesize must be >= 20480"
38658
1e0704cd9ee8 pasted set_lk_detect line in wrong spot in previous commit. fixed. passes tests this time.
Gregory P. Smith <greg@mad-scientist.com>
parents: 38657
diff changeset
410 e.set_lk_detect(db.DB_LOCK_DEFAULT)
30583
d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
Gregory P. Smith <greg@mad-scientist.com>
parents: 30475
diff changeset
411 e.open('.', db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD | db.DB_INIT_LOCK | db.DB_INIT_MPOOL)
d34b6f92dd32 Use a threadsafe private DBEnv for each bsddb compatibility interface
Gregory P. Smith <greg@mad-scientist.com>
parents: 30475
diff changeset
412 return e
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
413
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
414 def _checkflag(flag, file):
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
415 if flag == 'r':
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
416 flags = db.DB_RDONLY
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
417 elif flag == 'rw':
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
418 flags = 0
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
419 elif flag == 'w':
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
420 flags = db.DB_CREATE
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
421 elif flag == 'c':
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
422 flags = db.DB_CREATE
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
423 elif flag == 'n':
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
424 flags = db.DB_CREATE
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
425 #flags = db.DB_CREATE | db.DB_TRUNCATE
46984
e4e3b3eba226 Testsuite for bsddb module, version 4.6.4
Jesus Cea <jcea@jcea.es>
parents: 42767
diff changeset
426 # we used db.DB_TRUNCATE flag for this before but Berkeley DB
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
427 # 4.2.52 changed to disallowed truncate with txn environments.
37644
c6e11f804d00 Closes bug #1149413
Gregory P. Smith <greg@mad-scientist.com>
parents: 36630
diff changeset
428 if file is not None and os.path.isfile(file):
32424
3ddc7a23176b Fix SF bug # 897820 - we can no longer use the DB_TRUNCATE flag when
Gregory P. Smith <greg@mad-scientist.com>
parents: 31587
diff changeset
429 os.unlink(file)
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
430 else:
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
431 raise error, "flags should be one of 'r', 'w', 'c' or 'n'"
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
432 return flags | db.DB_THREAD
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
433
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
434 #----------------------------------------------------------------------
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
435
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
436
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
437 # This is a silly little hack that allows apps to continue to use the
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
438 # DB_THREAD flag even on systems without threads without freaking out
46984
e4e3b3eba226 Testsuite for bsddb module, version 4.6.4
Jesus Cea <jcea@jcea.es>
parents: 42767
diff changeset
439 # Berkeley DB.
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
440 #
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
441 # This assumes that if Python was built with thread support then
46984
e4e3b3eba226 Testsuite for bsddb module, version 4.6.4
Jesus Cea <jcea@jcea.es>
parents: 42767
diff changeset
442 # Berkeley DB was too.
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
443
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
444 try:
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
445 import thread
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
446 del thread
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
447 except ImportError:
27479
14b1758dfdde Everything worked in both the distutils distro and in Python 2.3cvs,
Barry Warsaw <barry@python.org>
parents: 26878
diff changeset
448 db.DB_THREAD = 0
26280
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
449
875140d30e17 Import PyBSDDB 3.4.0. Rename historical wrapper to bsddb185.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
450 #----------------------------------------------------------------------