def destruct(self):
if self._shm_key:
print "[%s] catch term sinal, ready to save to shm..." % self.__class__.__name__
new_shm_str = json.dumps(self._date_map)
ret = shm_open(self._shm_key, self._shm_size)
ret = shm_write(new_shm_str)
if ret == -2:
print "[%s] new shm str's size[%s] is too large!" % (self.__class__.__name__, len(new_shm_str))
elif ret == -1:
print "[%s] get shared memory failed!" % self.__class__.__name__
else:
print "[%s] save succ!" % self.__class__.__name__
def mount_shm(self, shm_key, shm_size=102400):
ret = shm_open(shm_key, shm_size)
self._date_map = {}
if ret == -1:
print "[%s] get shared memory failed!" % self.__class__.__name__
sys.exit(0)
else:
self._shm_key = shm_key
self._shm_size = shm_size
print "[%s] get shared memory succ!" % self.__class__.__name__
shm_str = shm_read()
print "%s read shm:%s" % (self.__class__.__name__, shm_str)
if not shm_str:
self._date_map = {}
else:
self._date_map = json.loads(shm_str)
def clear_shm(self):
if self._shm_key:
# clear the shm map
ret = shm_open(self._shm_key, self._shm_size)
shm_write('')