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[svn r37901] make_numbered_dir(): in a fork() situation, only the last process should remove

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the .lock, otherwise the other processes run the risk of seeing their temporary
dir disappear.  For now we remove the .lock in the parent only (i.e. we assume
that the children finish before the parent).

This is needed for long-running pypy translate.py processes using
--fork-before.

--HG--
branch : trunk
This commit is contained in:
arigo
2007-02-04 14:01:21 +01:00
parent f13381e3f9
commit 04cf3cdfa0
1 changed files with 10 additions and 2 deletions
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12
py/path/local/local.py
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@@ -608,11 +608,19 @@ class LocalPath(common.FSPathBase, PlatformMixin):
# put a .lock file in the new directory that will be removed at
# process exit
lockfile = udir.join('.lock')
mypid = os.getpid()
if hasattr(lockfile, 'mksymlinkto'):
lockfile.mksymlinkto(str(os.getpid()))
lockfile.mksymlinkto(str(mypid))
else:
lockfile.write(str(os.getpid()))
lockfile.write(str(mypid))
def try_remove_lockfile():
# in a fork() situation, only the last process should
# remove the .lock, otherwise the other processes run the
# risk of seeing their temporary dir disappear. For now
# we remove the .lock in the parent only (i.e. we assume
# that the children finish before the parent).
if os.getpid() != mypid:
return
try:
lockfile.remove()
except py.error.Error: