Mercurial > public > mercurial-scm > hg-stable
diff mercurial/transaction.py @ 28960:14e683d6b273
transaction: clear callback instances after usage
Prevents double usage and helps reduce reference cycles, which
were observed to occur in `hg convert` and other scenarios where
there are multiple transactions per process.
| author | Gregory Szorc <gregory.szorc@gmail.com> |
|---|---|
| date | Sat, 16 Apr 2016 09:02:37 -0700 |
| parents | a5009789960c |
| children | 9b41cfe0af31 |
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--- a/mercurial/transaction.py Sat Apr 16 09:00:15 2016 -0700 +++ b/mercurial/transaction.py Sat Apr 16 09:02:37 2016 -0700 @@ -431,6 +431,8 @@ categories = sorted(self._finalizecallback) for cat in categories: self._finalizecallback[cat](self) + # Prevent double usage and help clear cycles. + self._finalizecallback = None self._generatefiles(group=GenerationGroup.POSTFINALIZE) self.count -= 1 @@ -486,6 +488,8 @@ categories = sorted(self._postclosecallback) for cat in categories: self._postclosecallback[cat](self) + # Prevent double usage and help clear cycles. + self._postclosecallback = None @active def abort(self): @@ -539,6 +543,8 @@ try: for cat in sorted(self._abortcallback): self._abortcallback[cat](self) + # Prevent double usage and help clear cycles. + self._abortcallback = None _playback(self.journal, self.report, self.opener, self._vfsmap, self.entries, self._backupentries, False) self.report(_("rollback completed\n"))