comparison mercurial/revlog.py @ 21749:f13728d59c0e stable

revlog: make _chunkcache access atomic

With this and related fixes, 'hg serve' survived 100000 hits with
siege.

21748:8621125a1718

        l = []
        ladd = l.append

        # preload the cache
        try:
            self._chunkraw(revs[0], revs[-1])
            offset, data = self._chunkcache
        except OverflowError:
            # issue4215 - we can't cache a run of chunks greater than
            # 2G on Windows
            return [self._chunk(rev) for rev in revs]

21749:f13728d59c0e

        l = []
        ladd = l.append

        # preload the cache
        try:
            while 1:
                # ensure that the cache doesn't change out from under us
                _cache = self._chunkcache
                self._chunkraw(revs[0], revs[-1])
                if _cache == self._chunkcache:
                    break
            offset, data = _cache
        except OverflowError:
            # issue4215 - we can't cache a run of chunks greater than
            # 2G on Windows
            return [self._chunk(rev) for rev in revs]