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comparison mercurial/branchmap.py @ 51651:c0e30a019ce1 stable

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mmap: only use mmap to read rev-branch-cache data if it is safe Cf `is_mmap_safe` docstring.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 03 Jul 2024 12:31:21 +0200
parents f02ec1ecb3bf
children f4733654f144
comparison
equal deleted inserted replaced
51650:d6c895e4adc4 51651:c0e30a019ce1
1211 # don't try to use cache - fall back to the slow path 1211 # don't try to use cache - fall back to the slow path
1212 self.branchinfo = self._branchinfo 1212 self.branchinfo = self._branchinfo
1213 1213
1214 if self._names: 1214 if self._names:
1215 try: 1215 try:
1216 if repo.ui.configbool(b'storage', b'revbranchcache.mmap'): 1216 usemmap = repo.ui.configbool(b'storage', b'revbranchcache.mmap')
1217 with repo.cachevfs(_rbcrevs) as fp: 1217 with repo.cachevfs(_rbcrevs) as fp:
1218 if usemmap and repo.cachevfs.is_mmap_safe(_rbcrevs):
1218 data = util.buffer(util.mmapread(fp)) 1219 data = util.buffer(util.mmapread(fp))
1219 else: 1220 else:
1220 data = repo.cachevfs.read(_rbcrevs) 1221 data = fp.read()
1221 self._rbcrevs = rbcrevs(data) 1222 self._rbcrevs = rbcrevs(data)
1222 except (IOError, OSError) as inst: 1223 except (IOError, OSError) as inst:
1223 repo.ui.debug( 1224 repo.ui.debug(
1224 b"couldn't read revision branch cache: %s\n" 1225 b"couldn't read revision branch cache: %s\n"
1225 % stringutil.forcebytestr(inst) 1226 % stringutil.forcebytestr(inst)