def test_mmap_address(self):
import mmap
import _multiprocessing
# This is a bit faster than importing ctypes
import _ctypes
class c_double(_ctypes._SimpleCData):
_type_ = "d"
sizeof_double = _ctypes.sizeof(c_double)
buf = mmap.mmap(-1, 300)
buf[0:300] = '\0' * 300
# Get the address of shared memory
address, length = _multiprocessing.address_of_buffer(buf)
assert length == 300
# build a ctypes object from it
var = c_double.from_address(address)
assert buf[0:sizeof_double] == '\0' * sizeof_double
assert var.value == 0
# check that both objects share the same memory
var.value = 123.456
assert buf[0:sizeof_double] != '\0' * sizeof_double
buf[0:sizeof_double] = '\0' * sizeof_double
assert var.value == 0
def test_mmap_address(self):
import mmap
import _multiprocessing
# This is a bit faster than importing ctypes
import _ctypes
class c_double(_ctypes._SimpleCData):
_type_ = "d"
sizeof_double = _ctypes.sizeof(c_double)
buf = mmap.mmap(-1, 300)
buf[0:300] = '\0' * 300
# Get the address of shared memory
address, length = _multiprocessing.address_of_buffer(buf)
assert length == 300
# build a ctypes object from it
var = c_double.from_address(address)
assert buf[0:sizeof_double] == '\0' * sizeof_double
assert var.value == 0
# check that both objects share the same memory
var.value = 123.456
assert buf[0:sizeof_double] != '\0' * sizeof_double
buf[0:sizeof_double] = '\0' * sizeof_double
assert var.value == 0
def my_constructor(self, Identity, Context, Graph, AvatarName, CameraName):
self._Identity = Identity
self._Context = Context
self._Graph = Graph
self._AvatarName = AvatarName
self._CameraName = CameraName
#open shared memory
_name = "/MumbleLink." + str(os.getuid()) #name of shared memory
#TODO: next line crashes if mumble isn't running. Maybe add Error output
try:
_mem = pos.SharedMemory(_name, flags=0, size=sizeof(LinkedMem)) #flag 0 means access
print _mem.name
self._map = mmap.mmap(_mem.fd, _mem.size)
_mem.close_fd()
addr, size = address_of_buffer(self._map)
assert size == sizeof(LinkedMem)
except:
#print "Error while opening shared memory. Propably Mumble is not running !"
raise ShmError('Error while opening shared memory. Propably Mumble is not running !')
self._lm = LinkedMem.from_address(addr)
self._lm.uiTick = 1 #start with a number other than 0 so the first updated isn't skipped'''
#init trigger callback
#relying on field has changed could lead to mumble assuming the application died
self.frame_trigger = avango.script.nodes.Update(Callback = self.update, Active = True)
def open(self): _name = "/MumbleLink." + str(os.getuid()) #name of shared memory _mem = pos.SharedMemory(_name, flags=0, size=sizeof(LinkedMem)) #flag 0 means access print _mem.name self._map = mmap.mmap(_mem.fd, _mem.size) _mem.close_fd() addr, size = address_of_buffer(self._map) assert size == sizeof(LinkedMem) self._lm = LinkedMem.from_address(addr) self._lm.uiTick = 1 #start with a number other than 0 so the first updated isn't skipped
def get_address(self):
(arena, start, stop), size = self._state
address, length = _multiprocessing.address_of_buffer(arena.buffer)
assert size <= length
return address + start
def get_address(self):
addr, size = address_of_buffer(self._map)
assert size >= self.size
return addr
def get_address(self):
(arena, start, stop), size = self._state
address, length = _multiprocessing.address_of_buffer(arena.buffer)
assert size <= length
return address + start
def get_address(self):
(arena, start, stop), size = self._state
address, length = _multiprocessing.address_of_buffer(arena.buffer)
raise size <= length or AssertionError
return address + start
def get_address(self):
(arena, start, stop), size = self._state
address, length = _multiprocessing.address_of_buffer(arena.buffer)
raise size <= length or AssertionError
return address + start
def get_address(self):
addr, size = address_of_buffer(self._map)
assert size >= self.size
return addr
