Mercurial > kallithea
annotate rhodecode/lib/compat.py @ 3229:aad51f79d040 beta
added a flag for generating pull-request comments, and force display on pull-requests
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sat, 26 Jan 2013 21:21:11 +0100 |
parents | 4b7ad342e53b |
children | d7488551578e |
rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 """ |
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3 rhodecode.lib.compat |
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4 ~~~~~~~~~~~~~~~~~~~~ |
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5 |
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6 Python backward compatibility functions and common libs |
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7 |
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8 |
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9 :created_on: Oct 7, 2011 |
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10 :author: marcink |
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2012 copyrights
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11 :copyright: (C) 2010-2010 Marcin Kuzminski <marcin@python-works.com> |
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12 :license: GPLv3, see COPYING for more details. |
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13 """ |
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14 # This program is free software: you can redistribute it and/or modify |
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15 # it under the terms of the GNU General Public License as published by |
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16 # the Free Software Foundation, either version 3 of the License, or |
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17 # (at your option) any later version. |
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18 # |
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19 # This program is distributed in the hope that it will be useful, |
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20 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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22 # GNU General Public License for more details. |
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23 # |
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24 # You should have received a copy of the GNU General Public License |
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25 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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26 |
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27 import os |
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28 from rhodecode import __platform__, PLATFORM_WIN, __py_version__ |
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29 |
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30 #============================================================================== |
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31 # json |
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32 #============================================================================== |
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33 from rhodecode.lib.ext_json import json |
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34 import array |
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35 |
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36 |
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37 #============================================================================== |
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38 # izip_longest |
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39 #============================================================================== |
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40 try: |
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41 from itertools import izip_longest |
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42 except ImportError: |
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43 import itertools |
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44 |
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45 def izip_longest(*args, **kwds): |
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46 fillvalue = kwds.get("fillvalue") |
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47 |
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48 def sentinel(counter=([fillvalue] * (len(args) - 1)).pop): |
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49 yield counter() # yields the fillvalue, or raises IndexError |
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50 |
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51 fillers = itertools.repeat(fillvalue) |
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52 iters = [itertools.chain(it, sentinel(), fillers) |
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53 for it in args] |
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54 try: |
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55 for tup in itertools.izip(*iters): |
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56 yield tup |
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57 except IndexError: |
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58 pass |
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59 |
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60 |
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61 #============================================================================== |
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62 # OrderedDict |
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63 #============================================================================== |
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64 |
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65 # Python Software Foundation License |
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66 |
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67 # XXX: it feels like using the class with "is" and "is not" instead of "==" and |
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68 # "!=" should be faster. |
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69 class _Nil(object): |
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70 |
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71 def __repr__(self): |
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72 return "nil" |
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73 |
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74 def __eq__(self, other): |
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75 if (isinstance(other, _Nil)): |
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76 return True |
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77 else: |
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78 return NotImplemented |
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79 |
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80 def __ne__(self, other): |
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81 if (isinstance(other, _Nil)): |
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82 return False |
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83 else: |
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84 return NotImplemented |
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85 |
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86 _nil = _Nil() |
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87 |
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88 |
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89 class _odict(object): |
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90 """Ordered dict data structure, with O(1) complexity for dict operations |
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91 that modify one element. |
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92 |
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93 Overwriting values doesn't change their original sequential order. |
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94 """ |
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95 |
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96 def _dict_impl(self): |
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97 return None |
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98 |
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99 def __init__(self, data=(), **kwds): |
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100 """This doesn't accept keyword initialization as normal dicts to avoid |
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101 a trap - inside a function or method the keyword args are accessible |
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102 only as a dict, without a defined order, so their original order is |
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103 lost. |
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104 """ |
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105 if kwds: |
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106 raise TypeError("__init__() of ordered dict takes no keyword " |
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107 "arguments to avoid an ordering trap.") |
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108 self._dict_impl().__init__(self) |
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109 # If you give a normal dict, then the order of elements is undefined |
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110 if hasattr(data, "iteritems"): |
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111 for key, val in data.iteritems(): |
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112 self[key] = val |
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113 else: |
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114 for key, val in data: |
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115 self[key] = val |
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116 |
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117 # Double-linked list header |
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118 def _get_lh(self): |
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119 dict_impl = self._dict_impl() |
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120 if not hasattr(self, '_lh'): |
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121 dict_impl.__setattr__(self, '_lh', _nil) |
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122 return dict_impl.__getattribute__(self, '_lh') |
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123 |
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124 def _set_lh(self, val): |
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125 self._dict_impl().__setattr__(self, '_lh', val) |
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126 |
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127 lh = property(_get_lh, _set_lh) |
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128 |
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129 # Double-linked list tail |
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130 def _get_lt(self): |
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131 dict_impl = self._dict_impl() |
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132 if not hasattr(self, '_lt'): |
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133 dict_impl.__setattr__(self, '_lt', _nil) |
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134 return dict_impl.__getattribute__(self, '_lt') |
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135 |
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136 def _set_lt(self, val): |
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137 self._dict_impl().__setattr__(self, '_lt', val) |
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138 |
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139 lt = property(_get_lt, _set_lt) |
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140 |
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141 def __getitem__(self, key): |
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142 return self._dict_impl().__getitem__(self, key)[1] |
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143 |
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144 def __setitem__(self, key, val): |
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145 dict_impl = self._dict_impl() |
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146 try: |
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147 dict_impl.__getitem__(self, key)[1] = val |
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148 except KeyError: |
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149 new = [dict_impl.__getattribute__(self, 'lt'), val, _nil] |
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150 dict_impl.__setitem__(self, key, new) |
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151 if dict_impl.__getattribute__(self, 'lt') == _nil: |
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152 dict_impl.__setattr__(self, 'lh', key) |
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153 else: |
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154 dict_impl.__getitem__( |
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155 self, dict_impl.__getattribute__(self, 'lt'))[2] = key |
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156 dict_impl.__setattr__(self, 'lt', key) |
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157 |
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158 def __delitem__(self, key): |
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159 dict_impl = self._dict_impl() |
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160 pred, _, succ = self._dict_impl().__getitem__(self, key) |
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161 if pred == _nil: |
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162 dict_impl.__setattr__(self, 'lh', succ) |
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163 else: |
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164 dict_impl.__getitem__(self, pred)[2] = succ |
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165 if succ == _nil: |
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166 dict_impl.__setattr__(self, 'lt', pred) |
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167 else: |
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168 dict_impl.__getitem__(self, succ)[0] = pred |
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169 dict_impl.__delitem__(self, key) |
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170 |
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171 def __contains__(self, key): |
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172 return key in self.keys() |
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173 |
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174 def __len__(self): |
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175 return len(self.keys()) |
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176 |
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177 def __str__(self): |
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178 pairs = ("%r: %r" % (k, v) for k, v in self.iteritems()) |
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179 return "{%s}" % ", ".join(pairs) |
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180 |
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181 def __repr__(self): |
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182 if self: |
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183 pairs = ("(%r, %r)" % (k, v) for k, v in self.iteritems()) |
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184 return "odict([%s])" % ", ".join(pairs) |
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185 else: |
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186 return "odict()" |
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187 |
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188 def get(self, k, x=None): |
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189 if k in self: |
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190 return self._dict_impl().__getitem__(self, k)[1] |
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191 else: |
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192 return x |
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193 |
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194 def __iter__(self): |
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195 dict_impl = self._dict_impl() |
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196 curr_key = dict_impl.__getattribute__(self, 'lh') |
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197 while curr_key != _nil: |
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198 yield curr_key |
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199 curr_key = dict_impl.__getitem__(self, curr_key)[2] |
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200 |
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201 iterkeys = __iter__ |
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202 |
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203 def keys(self): |
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204 return list(self.iterkeys()) |
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205 |
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206 def itervalues(self): |
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207 dict_impl = self._dict_impl() |
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208 curr_key = dict_impl.__getattribute__(self, 'lh') |
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209 while curr_key != _nil: |
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210 _, val, curr_key = dict_impl.__getitem__(self, curr_key) |
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211 yield val |
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212 |
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213 def values(self): |
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214 return list(self.itervalues()) |
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215 |
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216 def iteritems(self): |
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217 dict_impl = self._dict_impl() |
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218 curr_key = dict_impl.__getattribute__(self, 'lh') |
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219 while curr_key != _nil: |
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220 _, val, next_key = dict_impl.__getitem__(self, curr_key) |
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221 yield curr_key, val |
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222 curr_key = next_key |
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223 |
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224 def items(self): |
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225 return list(self.iteritems()) |
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226 |
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227 def sort(self, cmp=None, key=None, reverse=False): |
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228 items = [(k, v) for k, v in self.items()] |
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229 if cmp is not None: |
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230 items = sorted(items, cmp=cmp) |
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231 elif key is not None: |
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232 items = sorted(items, key=key) |
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233 else: |
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234 items = sorted(items, key=lambda x: x[1]) |
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235 if reverse: |
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236 items.reverse() |
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237 self.clear() |
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238 self.__init__(items) |
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239 |
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240 def clear(self): |
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241 dict_impl = self._dict_impl() |
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242 dict_impl.clear(self) |
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243 dict_impl.__setattr__(self, 'lh', _nil) |
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244 dict_impl.__setattr__(self, 'lt', _nil) |
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245 |
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246 def copy(self): |
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247 return self.__class__(self) |
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248 |
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249 def update(self, data=(), **kwds): |
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250 if kwds: |
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251 raise TypeError("update() of ordered dict takes no keyword " |
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252 "arguments to avoid an ordering trap.") |
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253 if hasattr(data, "iteritems"): |
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254 data = data.iteritems() |
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255 for key, val in data: |
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256 self[key] = val |
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257 |
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258 def setdefault(self, k, x=None): |
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259 try: |
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260 return self[k] |
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261 except KeyError: |
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262 self[k] = x |
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|
263 return x |
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|
264 |
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265 def pop(self, k, x=_nil): |
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266 try: |
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267 val = self[k] |
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268 del self[k] |
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269 return val |
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270 except KeyError: |
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271 if x == _nil: |
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272 raise |
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273 return x |
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274 |
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275 def popitem(self): |
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276 try: |
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277 dict_impl = self._dict_impl() |
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278 key = dict_impl.__getattribute__(self, 'lt') |
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279 return key, self.pop(key) |
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280 except KeyError: |
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281 raise KeyError("'popitem(): ordered dictionary is empty'") |
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282 |
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283 def riterkeys(self): |
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284 """To iterate on keys in reversed order. |
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285 """ |
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286 dict_impl = self._dict_impl() |
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287 curr_key = dict_impl.__getattribute__(self, 'lt') |
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288 while curr_key != _nil: |
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289 yield curr_key |
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290 curr_key = dict_impl.__getitem__(self, curr_key)[0] |
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291 |
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292 __reversed__ = riterkeys |
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293 |
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294 def rkeys(self): |
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295 """List of the keys in reversed order. |
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296 """ |
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297 return list(self.riterkeys()) |
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298 |
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299 def ritervalues(self): |
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300 """To iterate on values in reversed order. |
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301 """ |
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302 dict_impl = self._dict_impl() |
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303 curr_key = dict_impl.__getattribute__(self, 'lt') |
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304 while curr_key != _nil: |
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305 curr_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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306 yield val |
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307 |
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308 def rvalues(self): |
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309 """List of the values in reversed order. |
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310 """ |
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311 return list(self.ritervalues()) |
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312 |
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313 def riteritems(self): |
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314 """To iterate on (key, value) in reversed order. |
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315 """ |
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316 dict_impl = self._dict_impl() |
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317 curr_key = dict_impl.__getattribute__(self, 'lt') |
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318 while curr_key != _nil: |
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319 pred_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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320 yield curr_key, val |
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321 curr_key = pred_key |
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322 |
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323 def ritems(self): |
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324 """List of the (key, value) in reversed order. |
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325 """ |
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326 return list(self.riteritems()) |
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327 |
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328 def firstkey(self): |
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329 if self: |
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330 return self._dict_impl().__getattribute__(self, 'lh') |
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331 else: |
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332 raise KeyError("'firstkey(): ordered dictionary is empty'") |
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|
333 |
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334 def lastkey(self): |
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335 if self: |
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336 return self._dict_impl().__getattribute__(self, 'lt') |
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|
337 else: |
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|
338 raise KeyError("'lastkey(): ordered dictionary is empty'") |
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339 |
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340 def as_dict(self): |
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341 return self._dict_impl()(self.items()) |
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342 |
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343 def _repr(self): |
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344 """_repr(): low level repr of the whole data contained in the odict. |
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345 Useful for debugging. |
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|
346 """ |
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347 dict_impl = self._dict_impl() |
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348 form = "odict low level repr lh,lt,data: %r, %r, %s" |
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349 return form % (dict_impl.__getattribute__(self, 'lh'), |
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350 dict_impl.__getattribute__(self, 'lt'), |
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changeset
|
351 dict_impl.__repr__(self)) |
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352 |
1890
a3efaaa6ed4f
fixes issue #271
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1824
diff
changeset
|
353 |
1514
87ec80c280bb
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changeset
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354 class OrderedDict(_odict, dict): |
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355 |
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356 def _dict_impl(self): |
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357 return dict |
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parents:
diff
changeset
|
358 |
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parents:
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changeset
|
359 |
87ec80c280bb
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parents:
diff
changeset
|
360 #============================================================================== |
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diff
changeset
|
361 # OrderedSet |
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|
362 #============================================================================== |
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parents:
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changeset
|
363 from sqlalchemy.util import OrderedSet |
1549
d6cb805c92fd
moved kill function to compat
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parents:
1514
diff
changeset
|
364 |
d6cb805c92fd
moved kill function to compat
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parents:
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diff
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|
365 |
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366 #============================================================================== |
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|
367 # kill FUNCTIONS |
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|
368 #============================================================================== |
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|
369 if __platform__ in PLATFORM_WIN: |
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|
370 import ctypes |
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|
371 |
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|
372 def kill(pid, sig): |
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diff
changeset
|
373 """kill function for Win32""" |
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diff
changeset
|
374 kernel32 = ctypes.windll.kernel32 |
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diff
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|
375 handle = kernel32.OpenProcess(1, 0, pid) |
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diff
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|
376 return (0 != kernel32.TerminateProcess(handle, 0)) |
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diff
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|
377 |
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parents:
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diff
changeset
|
378 else: |
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|
379 kill = os.kill |
2068 | 380 |
381 | |
382 #============================================================================== | |
383 # itertools.product | |
384 #============================================================================== | |
385 | |
386 try: | |
387 from itertools import product | |
388 except ImportError: | |
389 def product(*args, **kwds): | |
390 # product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy | |
391 # product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111 | |
392 pools = map(tuple, args) * kwds.get('repeat', 1) | |
393 result = [[]] | |
394 for pool in pools: | |
395 result = [x + [y] for x in result for y in pool] | |
396 for prod in result: | |
397 yield tuple(prod) | |
2552
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
2173
diff
changeset
|
398 |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
2173
diff
changeset
|
399 |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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changeset
|
400 #============================================================================== |
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Moved BytesIO into compat because of py25 compatibility issue
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parents:
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diff
changeset
|
401 # BytesIO |
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Moved BytesIO into compat because of py25 compatibility issue
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changeset
|
402 #============================================================================== |
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Moved BytesIO into compat because of py25 compatibility issue
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parents:
2173
diff
changeset
|
403 |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
Marcin Kuzminski <marcin@python-works.com>
parents:
2173
diff
changeset
|
404 try: |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
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diff
changeset
|
405 from io import BytesIO |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
2173
diff
changeset
|
406 except ImportError: |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
2173
diff
changeset
|
407 from cStringIO import StringIO as BytesIO |
2729
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
parents:
2552
diff
changeset
|
408 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
parents:
2552
diff
changeset
|
409 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
parents:
2552
diff
changeset
|
410 #============================================================================== |
2790
3c0ae44557c4
more py2.5 compatibility patches
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parents:
2730
diff
changeset
|
411 # bytes |
3c0ae44557c4
more py2.5 compatibility patches
Marcin Kuzminski <marcin@python-works.com>
parents:
2730
diff
changeset
|
412 #============================================================================== |
3c0ae44557c4
more py2.5 compatibility patches
Marcin Kuzminski <marcin@python-works.com>
parents:
2730
diff
changeset
|
413 if __py_version__ >= (2, 6): |
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414 _bytes = bytes |
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415 else: |
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416 # in py2.6 bytes is a synonim for str |
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417 _bytes = str |
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418 |
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419 if __py_version__ >= (2, 6): |
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420 _bytearray = bytearray |
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421 else: |
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422 # no idea if this is correct but all integration tests are passing |
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423 # i think we never use bytearray anyway |
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424 _bytearray = array |
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425 |
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426 |
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427 #============================================================================== |
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428 # deque |
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429 #============================================================================== |
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430 |
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431 if __py_version__ >= (2, 6): |
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432 from collections import deque |
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433 else: |
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434 #need to implement our own deque with maxlen |
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435 class deque(object): |
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436 |
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437 def __init__(self, iterable=(), maxlen= -1): |
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438 if not hasattr(self, 'data'): |
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439 self.left = self.right = 0 |
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440 self.data = {} |
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441 self.maxlen = maxlen or -1 |
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442 self.extend(iterable) |
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443 |
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444 def append(self, x): |
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445 self.data[self.right] = x |
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446 self.right += 1 |
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447 if self.maxlen != -1 and len(self) > self.maxlen: |
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448 self.popleft() |
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449 |
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450 def appendleft(self, x): |
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451 self.left -= 1 |
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452 self.data[self.left] = x |
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453 if self.maxlen != -1 and len(self) > self.maxlen: |
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454 self.pop() |
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455 |
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456 def pop(self): |
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457 if self.left == self.right: |
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458 raise IndexError('cannot pop from empty deque') |
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459 self.right -= 1 |
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460 elem = self.data[self.right] |
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461 del self.data[self.right] |
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462 return elem |
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463 |
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464 def popleft(self): |
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465 if self.left == self.right: |
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466 raise IndexError('cannot pop from empty deque') |
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467 elem = self.data[self.left] |
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468 del self.data[self.left] |
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469 self.left += 1 |
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470 return elem |
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471 |
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472 def clear(self): |
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473 self.data.clear() |
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474 self.left = self.right = 0 |
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475 |
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476 def extend(self, iterable): |
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477 for elem in iterable: |
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478 self.append(elem) |
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479 |
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480 def extendleft(self, iterable): |
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481 for elem in iterable: |
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482 self.appendleft(elem) |
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483 |
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484 def rotate(self, n=1): |
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485 if self: |
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486 n %= len(self) |
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487 for i in xrange(n): |
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488 self.appendleft(self.pop()) |
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489 |
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|
490 def __getitem__(self, i): |
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491 if i < 0: |
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492 i += len(self) |
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493 try: |
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494 return self.data[i + self.left] |
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495 except KeyError: |
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496 raise IndexError |
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497 |
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498 def __setitem__(self, i, value): |
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499 if i < 0: |
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500 i += len(self) |
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501 try: |
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|
502 self.data[i + self.left] = value |
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503 except KeyError: |
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504 raise IndexError |
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505 |
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|
506 def __delitem__(self, i): |
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507 size = len(self) |
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508 if not (-size <= i < size): |
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509 raise IndexError |
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510 data = self.data |
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511 if i < 0: |
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512 i += size |
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513 for j in xrange(self.left + i, self.right - 1): |
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514 data[j] = data[j + 1] |
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515 self.pop() |
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516 |
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517 def __len__(self): |
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518 return self.right - self.left |
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519 |
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520 def __cmp__(self, other): |
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521 if type(self) != type(other): |
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522 return cmp(type(self), type(other)) |
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523 return cmp(list(self), list(other)) |
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|
524 |
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|
525 def __repr__(self, _track=[]): |
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526 if id(self) in _track: |
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527 return '...' |
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added deque with maxlen for py2.5 compat
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|
528 _track.append(id(self)) |
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529 r = 'deque(%r, maxlen=%s)' % (list(self), self.maxlen) |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
530 _track.remove(id(self)) |
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added deque with maxlen for py2.5 compat
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|
531 return r |
e9e7c40b4f1a
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|
532 |
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|
533 def __getstate__(self): |
e9e7c40b4f1a
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|
534 return (tuple(self),) |
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added deque with maxlen for py2.5 compat
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|
535 |
e9e7c40b4f1a
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|
536 def __setstate__(self, s): |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
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|
537 self.__init__(s[0]) |
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added deque with maxlen for py2.5 compat
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538 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
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|
539 def __hash__(self): |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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parents:
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|
540 raise TypeError |
e9e7c40b4f1a
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changeset
|
541 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
542 def __copy__(self): |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
543 return self.__class__(self) |
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added deque with maxlen for py2.5 compat
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|
544 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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changeset
|
545 def __deepcopy__(self, memo={}): |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
546 from copy import deepcopy |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
547 result = self.__class__() |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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diff
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|
548 memo[id(self)] = result |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
549 result.__init__(deepcopy(tuple(self), memo)) |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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|
550 return result |
2730
7949bc80b3b1
more py25 compat fixes
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|
551 |
7949bc80b3b1
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|
552 |
7949bc80b3b1
more py25 compat fixes
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|
553 #============================================================================== |
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|
554 # threading.Event |
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more py25 compat fixes
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555 #============================================================================== |
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|
556 |
7949bc80b3b1
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557 if __py_version__ >= (2, 6): |
2790
3c0ae44557c4
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|
558 from threading import Event, Thread |
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559 else: |
2826
4b7ad342e53b
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Marcin Kuzminski <marcin@python-works.com>
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|
560 from threading import _Verbose, Condition, Lock, Thread, _time, \ |
4b7ad342e53b
python2.5 fixes !
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561 _allocate_lock, RLock, _sleep |
4b7ad342e53b
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|
562 |
4b7ad342e53b
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|
563 def Condition(*args, **kwargs): |
4b7ad342e53b
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|
564 return _Condition(*args, **kwargs) |
4b7ad342e53b
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565 |
4b7ad342e53b
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|
566 class _Condition(_Verbose): |
4b7ad342e53b
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Marcin Kuzminski <marcin@python-works.com>
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|
567 |
4b7ad342e53b
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|
568 def __init__(self, lock=None, verbose=None): |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
parents:
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569 _Verbose.__init__(self, verbose) |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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570 if lock is None: |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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571 lock = RLock() |
4b7ad342e53b
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|
572 self.__lock = lock |
4b7ad342e53b
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|
573 # Export the lock's acquire() and release() methods |
4b7ad342e53b
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|
574 self.acquire = lock.acquire |
4b7ad342e53b
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|
575 self.release = lock.release |
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|
576 # If the lock defines _release_save() and/or _acquire_restore(), |
4b7ad342e53b
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577 # these override the default implementations (which just call |
4b7ad342e53b
python2.5 fixes !
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578 # release() and acquire() on the lock). Ditto for _is_owned(). |
4b7ad342e53b
python2.5 fixes !
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changeset
|
579 try: |
4b7ad342e53b
python2.5 fixes !
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|
580 self._release_save = lock._release_save |
4b7ad342e53b
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|
581 except AttributeError: |
4b7ad342e53b
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|
582 pass |
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parents:
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changeset
|
583 try: |
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diff
changeset
|
584 self._acquire_restore = lock._acquire_restore |
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python2.5 fixes !
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parents:
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|
585 except AttributeError: |
4b7ad342e53b
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586 pass |
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Marcin Kuzminski <marcin@python-works.com>
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|
587 try: |
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python2.5 fixes !
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diff
changeset
|
588 self._is_owned = lock._is_owned |
4b7ad342e53b
python2.5 fixes !
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|
589 except AttributeError: |
4b7ad342e53b
python2.5 fixes !
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|
590 pass |
4b7ad342e53b
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Marcin Kuzminski <marcin@python-works.com>
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|
591 self.__waiters = [] |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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diff
changeset
|
592 |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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changeset
|
593 def __enter__(self): |
4b7ad342e53b
python2.5 fixes !
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|
594 return self.__lock.__enter__() |
4b7ad342e53b
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Marcin Kuzminski <marcin@python-works.com>
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diff
changeset
|
595 |
4b7ad342e53b
python2.5 fixes !
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diff
changeset
|
596 def __exit__(self, *args): |
4b7ad342e53b
python2.5 fixes !
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parents:
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diff
changeset
|
597 return self.__lock.__exit__(*args) |
4b7ad342e53b
python2.5 fixes !
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parents:
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diff
changeset
|
598 |
4b7ad342e53b
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parents:
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diff
changeset
|
599 def __repr__(self): |
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python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
parents:
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600 return "<Condition(%s, %d)>" % (self.__lock, len(self.__waiters)) |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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|
601 |
4b7ad342e53b
python2.5 fixes !
Marcin Kuzminski <marcin@python-works.com>
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|
602 def _release_save(self): |
4b7ad342e53b
python2.5 fixes !
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|
603 self.__lock.release() # No state to save |
4b7ad342e53b
python2.5 fixes !
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|
604 |
4b7ad342e53b
python2.5 fixes !
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diff
changeset
|
605 def _acquire_restore(self, x): |
4b7ad342e53b
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changeset
|
606 self.__lock.acquire() # Ignore saved state |
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607 |
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changeset
|
608 def _is_owned(self): |
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parents:
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changeset
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609 # Return True if lock is owned by current_thread. |
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610 # This method is called only if __lock doesn't have _is_owned(). |
4b7ad342e53b
python2.5 fixes !
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611 if self.__lock.acquire(0): |
4b7ad342e53b
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|
612 self.__lock.release() |
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|
613 return False |
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|
614 else: |
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|
615 return True |
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|
616 |
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|
617 def wait(self, timeout=None): |
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618 if not self._is_owned(): |
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619 raise RuntimeError("cannot wait on un-acquired lock") |
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620 waiter = _allocate_lock() |
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621 waiter.acquire() |
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622 self.__waiters.append(waiter) |
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623 saved_state = self._release_save() |
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624 try: # restore state no matter what (e.g., KeyboardInterrupt) |
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625 if timeout is None: |
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626 waiter.acquire() |
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627 if __debug__: |
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628 self._note("%s.wait(): got it", self) |
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629 else: |
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630 # Balancing act: We can't afford a pure busy loop, so we |
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631 # have to sleep; but if we sleep the whole timeout time, |
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632 # we'll be unresponsive. The scheme here sleeps very |
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633 # little at first, longer as time goes on, but never longer |
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634 # than 20 times per second (or the timeout time remaining). |
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635 endtime = _time() + timeout |
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636 delay = 0.0005 # 500 us -> initial delay of 1 ms |
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637 while True: |
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638 gotit = waiter.acquire(0) |
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639 if gotit: |
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640 break |
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641 remaining = endtime - _time() |
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642 if remaining <= 0: |
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|
643 break |
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644 delay = min(delay * 2, remaining, .05) |
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645 _sleep(delay) |
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|
646 if not gotit: |
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|
647 if __debug__: |
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648 self._note("%s.wait(%s): timed out", self, timeout) |
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649 try: |
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650 self.__waiters.remove(waiter) |
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651 except ValueError: |
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652 pass |
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653 else: |
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654 if __debug__: |
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655 self._note("%s.wait(%s): got it", self, timeout) |
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656 finally: |
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657 self._acquire_restore(saved_state) |
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658 |
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659 def notify(self, n=1): |
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660 if not self._is_owned(): |
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661 raise RuntimeError("cannot notify on un-acquired lock") |
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662 __waiters = self.__waiters |
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663 waiters = __waiters[:n] |
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664 if not waiters: |
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665 if __debug__: |
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666 self._note("%s.notify(): no waiters", self) |
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667 return |
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668 self._note("%s.notify(): notifying %d waiter%s", self, n, |
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669 n != 1 and "s" or "") |
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670 for waiter in waiters: |
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671 waiter.release() |
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672 try: |
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673 __waiters.remove(waiter) |
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674 except ValueError: |
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675 pass |
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676 |
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677 def notifyAll(self): |
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678 self.notify(len(self.__waiters)) |
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679 |
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680 notify_all = notifyAll |
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681 |
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682 def Event(*args, **kwargs): |
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683 return _Event(*args, **kwargs) |
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684 |
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685 class _Event(_Verbose): |
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686 |
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687 # After Tim Peters' event class (without is_posted()) |
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688 |
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689 def __init__(self, verbose=None): |
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690 _Verbose.__init__(self, verbose) |
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691 self.__cond = Condition(Lock()) |
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692 self.__flag = False |
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693 |
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694 def isSet(self): |
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695 return self.__flag |
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696 |
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697 is_set = isSet |
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698 |
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699 def set(self): |
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700 self.__cond.acquire() |
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701 try: |
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702 self.__flag = True |
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703 self.__cond.notify_all() |
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704 finally: |
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705 self.__cond.release() |
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706 |
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707 def clear(self): |
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708 self.__cond.acquire() |
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709 try: |
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710 self.__flag = False |
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711 finally: |
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712 self.__cond.release() |
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713 |
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714 def wait(self, timeout=None): |
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715 self.__cond.acquire() |
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716 try: |
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717 if not self.__flag: |
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718 self.__cond.wait(timeout) |
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719 finally: |
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720 self.__cond.release() |