def create_lock(self, cur_dir, ami_path, exclusive):
if ami_path == "":
if cur_dir == None:
ami_path = "SYS:"
else:
ami_path = cur_dir.ami_path
else:
ami_path = self.path_mgr.ami_abs_path(cur_dir, ami_path)
sys_path = self.path_mgr.ami_to_sys_path(cur_dir,
ami_path,
searchMulti=True)
name = self.path_mgr.ami_name_of_path(cur_dir, ami_path)
if sys_path == None:
log_lock.info("lock '%s' invalid: no sys path found: '%s'", name,
ami_path)
return None
exists = os.path.exists(sys_path)
if not exists:
log_lock.info(
"lock '%s' invalid: sys path does not exist: '%s' -> '%s'",
name,
ami_path,
sys_path,
)
return None
lock = Lock(name, ami_path, sys_path, exclusive)
self._register_lock(lock)
return lock
def _register_lock(self, lock):
# look up volume
volume_name = self.path_mgr.ami_volume_of_path(lock.ami_path)
log_lock.debug("fl_Volume: looking up volume '%s' of %s",volume_name,lock)
volume = self.dos_list.get_entry_by_name(volume_name)
if volume is None:
vol_baddr = 0
log_lock.warn("lock volume? volume=%s lock=%s",volume,lock)
else:
vol_baddr = volume.mem.addr
# allocate lock struct
b_addr = lock.alloc(self.alloc, vol_baddr, self.generate_key)
self.locks_by_baddr[b_addr] = lock
log_lock.info("registered: %s" % lock)
def _unregister_lock(self, lock):
log_lock.info("unregistered: %s" % lock)
# fetch key and lock_key
slot_id = lock.key
lock_key = self.keys[slot_id]
# remove lock in key
lock_key.del_lock(lock)
# last lock in key?
if lock_key.no_locks():
del self.sys_path_to_key_map[lock.sys_path]
self.locks.free(slot_id)
# free lock itself
lock.free(self.alloc)
del lock
def create_lock(self, cur_dir, ami_path, exclusive):
if ami_path == '':
if cur_dir == None:
ami_path = "SYS:"
else:
ami_path = cur_dir.ami_path
else:
ami_path = self.path_mgr.ami_abs_path(cur_dir,ami_path)
sys_path = self.path_mgr.ami_to_sys_path(cur_dir,ami_path,searchMulti=True)
name = self.path_mgr.ami_name_of_path(cur_dir,ami_path)
if sys_path == None:
log_lock.info("lock '%s' invalid: no sys path found: '%s'", name, ami_path)
return None
exists = os.path.exists(sys_path)
if not exists:
log_lock.info("lock '%s' invalid: sys path does not exist: '%s' -> '%s'", name, ami_path, sys_path)
return None
lock = Lock(name, ami_path, sys_path, exclusive)
self._register_lock(lock)
return lock
def _register_lock(self, lock):
# look up volume
volume_name = self.path_mgr.ami_volume_of_path(lock.ami_path)
log_lock.debug("fl_Volume: looking up volume '%s' of %s", volume_name, lock)
volume = self.dos_list.get_entry_by_name(volume_name)
if volume is None:
vol_baddr = 0
log_lock.warning("lock volume? volume=%s lock=%s", volume, lock)
else:
vol_baddr = volume.mem.addr
# is key already assigned to sys_path?
lock_key = self.sys_path_to_key_map.get(lock.sys_path)
if not lock_key:
# allocate new slot id
lock_key = LockKey(lock.sys_path)
slot_id = self.keys.alloc(lock_key)
log_lock.debug(
"allocate log key slot %s for sys_path '%s'", slot_id, lock.sys_path
)
if slot_id is None:
log_lock.error("no more lock slots! max=%d", len(self.keys))
return None
lock_key.slot_id = slot_id
else:
slot_id = lock_key.slot_id
log_lock.debug(
"found log key slot %s for sys_path '%s'", slot_id, lock.sys_path
)
# allocate lock struct and use slot_id for key
lock.alloc(self.alloc, vol_baddr, slot_id)
# register lock in key (with baddr allocated above)
lock_key.add_lock(lock)
log_lock.info("registered: %s" % lock)
return lock
def _unregister_lock(self, lock):
log_lock.info("unregistered: %s" % lock)
del self.locks_by_baddr[lock.b_addr]
lock.free(self.alloc)
del lock
