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Viewing changes to bzrlib/lockable_files.py

  • Committer: Bazaar Package Importer
  • Author(s): Etienne Goyer
  • Date: 2007-04-27 17:53:49 UTC
  • mfrom: (1.1.23 upstream)
  • Revision ID: james.westby@ubuntu.com-20070427175349-rvowqx994rfuikuu
Tags: 0.16~rc1-0ubuntu1
New upstream development release 

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Lines of Context:
bzrlib/lockable_files.py
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            raise errors.BzrBadParameterNotString(a_string)
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        self.put_bytes(path, a_string.encode('utf-8'))
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    def lock_write(self):
 
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    def leave_in_place(self):
 
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        """Set this LockableFiles to not clear the physical lock on unlock."""
 
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        self._lock.leave_in_place()
 
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    def dont_leave_in_place(self):
 
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        """Set this LockableFiles to clear the physical lock on unlock."""
 
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        self._lock.dont_leave_in_place()
 
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    def lock_write(self, token=None):
 
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        """Lock this group of files for writing.
 
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        :param token: if this is already locked, then lock_write will fail
 
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            unless the token matches the existing lock.
 
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        :returns: a token if this instance supports tokens, otherwise None.
 
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        :raises TokenLockingNotSupported: when a token is given but this
 
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            instance doesn't support using token locks.
 
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        :raises MismatchedToken: if the specified token doesn't match the token
 
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            of the existing lock.
 
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        A token should be passed in if you know that you have locked the object
 
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        some other way, and need to synchronise this object's state with that
 
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        fact.
 
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        """
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        # mutter("lock write: %s (%s)", self, self._lock_count)
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        # TODO: Upgrade locking to support using a Transport,
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        # and potentially a remote locking protocol
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        if self._lock_mode:
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            if self._lock_mode != 'w' or not self.get_transaction().writeable():
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                raise errors.ReadOnlyError(self)
 
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            self._lock.validate_token(token)
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            self._lock_count += 1
 
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            return self._token_from_lock
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        else:
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            self._lock.lock_write()
 
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            token_from_lock = self._lock.lock_write(token=token)
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            #note('write locking %s', self)
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            #traceback.print_stack()
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            self._lock_mode = 'w'
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            self._lock_count = 1
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            self._set_transaction(transactions.WriteTransaction())
 
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            self._token_from_lock = token_from_lock
 
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            return token_from_lock
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    def lock_read(self):
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        # mutter("lock read: %s (%s)", self, self._lock_count)
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    def break_lock(self):
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        raise NotImplementedError(self.break_lock)
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    def lock_write(self):
 
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    def leave_in_place(self):
 
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        raise NotImplementedError(self.leave_in_place)
 
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    def dont_leave_in_place(self):
 
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        raise NotImplementedError(self.dont_leave_in_place)
 
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    def lock_write(self, token=None):
 
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        if token is not None:
 
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            raise errors.TokenLockingNotSupported(self)
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        self._lock = self._transport.lock_write(self._escaped_name)
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    def lock_read(self):
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        # for old-style locks, create the file now
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        self._transport.put_bytes(self._escaped_name, '',
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                            mode=self._file_modebits)
 
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    def validate_token(self, token):
 
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        if token is not None:
 
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            raise errors.TokenLockingNotSupported(self)
 
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