Mercurial > traipse_dev
view upmana/mercurial/lock.py @ 248:1df5912db00c beta tip
Traipse Beta 'OpenRPG' {101205-00}
Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user.
Update Summary (Closed)
New Features:
New to Map, can re-order Grid, Miniatures, and Whiteboard layer draw order
New to Server GUI, can now clear log
New Earthdawn Dieroller
New IronClaw roller, sheet, and image
New ShapeShifter PC Sheet
Updates:
Update to Warhammer PC Sheet. Rollers set as macros. Should work with little maintanence.
Update to Browser Server window. Display rooms with ' " & cleaner
Update to Server. Handles ' " & cleaner
Update to Dieroller. Cleaner, more effecient expression system
Update to Hidden Die plugin, allows for non standard dice rolls
Update to location.py, allows for more portable references when starting Traipse
Update to the Features node
Fixes:
Fix to InterParse that was causing an Infernal Loop with Namespace Internal
Fix to XML data, removed old Minidom and switched to Element Tree
Fix to Server that was causing eternal attempt to find a Server ID, in Register Rooms thread
Fix to Server, removing wxPython dependencies where not needed
Fix to metaservers.xml file not being created
Fix to Single and Double quotes in Whiteboard text
Fix to Background images not showing when using the Image Server
Fix to Duplicate chat names appearing
Fix to Server GUI's logging output
Fix to FNB.COLORFUL_TABS bug
Fix to Gametree for XSLT Sheets
Fix to Gametree for locating gametree files
Fix to Send to Chat from Gametree
Fix to Gametree, renaming and remapping operates correctly
Fix to aliaslib, prevents error caused when SafeHTML is sent None
author | sirebral |
---|---|
date | Sun, 05 Dec 2010 10:53:30 -0600 |
parents | dcf4fbe09b70 |
children |
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# lock.py - simple locking scheme for mercurial # # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2, incorporated herein by reference. import util, error import errno, os, socket, time import warnings class lock(object): # lock is symlink on platforms that support it, file on others. # symlink is used because create of directory entry and contents # are atomic even over nfs. # old-style lock: symlink to pid # new-style lock: symlink to hostname:pid _host = None def __init__(self, file, timeout=-1, releasefn=None, desc=None): self.f = file self.held = 0 self.timeout = timeout self.releasefn = releasefn self.desc = desc self.lock() def __del__(self): if self.held: warnings.warn("use lock.release instead of del lock", category=DeprecationWarning, stacklevel=2) # ensure the lock will be removed # even if recursive locking did occur self.held = 1 self.release() def lock(self): timeout = self.timeout while 1: try: self.trylock() return 1 except error.LockHeld, inst: if timeout != 0: time.sleep(1) if timeout > 0: timeout -= 1 continue raise error.LockHeld(errno.ETIMEDOUT, inst.filename, self.desc, inst.locker) def trylock(self): if self.held: self.held += 1 return if lock._host is None: lock._host = socket.gethostname() lockname = '%s:%s' % (lock._host, os.getpid()) while not self.held: try: util.makelock(lockname, self.f) self.held = 1 except (OSError, IOError), why: if why.errno == errno.EEXIST: locker = self.testlock() if locker is not None: raise error.LockHeld(errno.EAGAIN, self.f, self.desc, locker) else: raise error.LockUnavailable(why.errno, why.strerror, why.filename, self.desc) def testlock(self): """return id of locker if lock is valid, else None. If old-style lock, we cannot tell what machine locker is on. with new-style lock, if locker is on this machine, we can see if locker is alive. If locker is on this machine but not alive, we can safely break lock. The lock file is only deleted when None is returned. """ locker = util.readlock(self.f) try: host, pid = locker.split(":", 1) except ValueError: return locker if host != lock._host: return locker try: pid = int(pid) except: return locker if util.testpid(pid): return locker # if locker dead, break lock. must do this with another lock # held, or can race and break valid lock. try: l = lock(self.f + '.break') l.trylock() os.unlink(self.f) l.release() except error.LockError: return locker def release(self): if self.held > 1: self.held -= 1 elif self.held is 1: self.held = 0 if self.releasefn: self.releasefn() try: os.unlink(self.f) except: pass def release(*locks): for lock in locks: if lock is not None: lock.release()