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#cython: language_level=3
import functools
__c_cython_mapping__ = {}
cdef class OBIObject:
def __init__(self, __internalCall__) :
if __internalCall__ != 987654 or \
type(self) == OBIObject or \
type(self) == OBIWrapper or \
not isinstance(self, OBIObject) :
raise RuntimeError('OBIObject constructor can not be called directly')
self._dependent_objects = {}
cdef register(self, OBIObject object):
self._dependent_objects[id(object)] = object
cdef unregister(self, OBIObject object):
del self._dependent_objects[id(object)]
def close(self):
cdef OBIObject object
cdef list to_close = list((self._dependent_objects).values())
for object in to_close:
object.close()
assert len(self._dependent_objects.values()) == 0
cdef class OBIWrapper(OBIObject) :
'''
The OBIWrapper class enables to wrap a C object representing a DMS or an element from a DMS.
'''
@staticmethod
def checkIsActive(instance):
'''
Decorator function to check that an instance is still active (associated pointer not NULL)
'''
@functools.wraps(instance)
def check(self,*args,**kargs):
if self.dead:
raise OBIDeactivatedInstanceError()
return instance(self,*args,**kargs)
return check
cdef inline size_t cid(self) :
return <size_t>(self._pointer)
cdef inline bint active(self) :
return self._pointer != NULL
def close(self):
if (self._pointer != NULL):
OBIObject.close(self)
del __c_cython_mapping__[<size_t>self._pointer]
self._pointer = NULL
assert len(self._dependent_objects.values()) == 0
def __dealloc__(self):
'''
Destructor of any OBI instance.
The destructor automatically calls the `close` method and
therefore closes and frees all associated objects and memory.
'''
self.close()
@property
def dead(self):
return self._pointer==NULL
@staticmethod
cdef object new_wrapper(type constructor, void* pointer) :
cdef OBIWrapper o
if (<size_t>pointer in __c_cython_mapping__):
#print("Pointer already in cython dict")
return __c_cython_mapping__[<size_t>pointer]
else:
o = constructor(987654)
o._pointer = pointer
__c_cython_mapping__[<size_t>pointer] = o
return o
cdef class OBIDeactivatedInstanceError(Exception):
pass
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