def __tx_add_undocopy(self):
'''
Start consistent transaction (very basic copy-off undo-log)
'''
name = self.name + '-' + str(len(self.tx_log)) + '-tx'
(tx_handle,
mem) = self.memory_resource._MemoryResource_create_named_memory(
name, len(self.memory_view))
if tx_handle is None:
raise RuntimeError('tx_begin failed')
self.tx_log.append((tx_handle, name))
# copy data, then persist
mem[:] = self.memory_view
self.memory_resource._MemoryResource_persist_memory_view(
self.memory_view)
print('tx_begin: copy of {}:{} to ({}, {})'.format(
hex(pymmcore.memoryview_addr(self.memory_view)),
len(self.memory_view), name, hex(pymmcore.memoryview_addr(mem))))
def __tx_begin_swcopy(self):
'''
Start consistent transaction (very basic copy-off undo-log)
'''
(self.tx_handle, mem) = self.mr._MemoryResource_create_named_memory(self.varname + '-tx', len(self.buffer))
if self.tx_handle is None:
raise RuntimeError('tx_begin failed')
# copy data, then persist
mem[:]= self.buffer;
self.mr._MemoryResource_persist_memory_view(mem)
if self._debug_level > 0:
print('tx_begin: copy @ {}'.format(hex(pymmcore.memoryview_addr(mem)), len(mem)))
def __del__(self):
if self._debug_level > 0:
print("releasing named memory {} @ {}".format(
self.varname, hex(pymmcore.memoryview_addr(self.buffer))))
self.persist()
self.mr.release_named_memory_by_handle(self.handle)
def addr(self):
'''
For debugging. Get address of memory view
'''
return (hex(pymmcore.memoryview_addr(self.buffer)), len(self.buffer))