Added support for (1 for now) destructor callback on CCS objects.

bindings/python/cconfigspace/base.py

@@ -345,11 +345,14 @@ ccs_retain_object = _ccs_get_function("ccs_retain_object", [ccs_object])
 ccs_release_object = _ccs_get_function("ccs_release_object", [ccs_object])
 ccs_object_get_type = _ccs_get_function("ccs_object_get_type", [ccs_object, ct.POINTER(ccs_object_type)])
 ccs_object_get_refcount = _ccs_get_function("ccs_object_get_refcount", [ccs_object, ct.POINTER(ct.c_int)])
+ccs_object_destroy_callback_type = ct.CFUNCTYPE(None, ccs_object, ct.c_void_p)
+ccs_object_set_destroy_callback = _ccs_get_function("ccs_object_set_destroy_callback", [ccs_object, ccs_object_destroy_callback_type, ct.c_void_p])
 
 _res = ccs_init()
 Error.check(_res)
 
 class Object:
+
   def __init__(self, handle, retain = False, auto_release = True):
     if handle is None:
       raise Error(ccs_error(ccs_error.INVALID_OBJECT))
@@ -360,8 +363,9 @@ class Object:
       Error.check(res)
 
   def __del__(self):
-    res = ccs_release_object(self._handle)
-    Error.check(res)
+    if self.auto_release:
+      res = ccs_release_object(self._handle)
+      Error.check(res)
 
   @property
   def handle(self):
@@ -389,28 +393,59 @@ class Object:
     t = ccs_object_type(0)
     res = ccs_object_get_type(h, ct.byref(t))
     Error.check(res)
+    r = ct.c_int(0)
+    res = ccs_object_get_refcount(h, ct.byref(r))
+    Error.check(res)
+    r = r.value
+    if r == 0:
+      retain = False
+      auto_release = False
+    else:
+      retain = True
+      auto_release = True
     v = t.value
     if v == ccs_object_type.RNG:
-      return Rng.from_handle(h)
+      return Rng.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.DISTRIBUTION:
-      return Distribution.from_handle(h)
+      return Distribution.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.HYPERPARAMETER:
-      return Hyperparameter.from_handle(h)
+      return Hyperparameter.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.EXPRESSION:
-      return Expression.from_handle(h)
+      return Expression.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.CONFIGURATION_SPACE:
-      return ConfigurationSpace.from_handle(h)
+      return ConfigurationSpace.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.CONFIGURATION:
-      return Configuration.from_handle(h)
+      return Configuration.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.OBJECTIVE_SPACE:
-      return ObjectiveSpace.from_handle(h)
+      return ObjectiveSpace.from_handle(h, retain = retain, auto_release = auto_release)
     elif v == ccs_object_type.EVALUATION:
-      return Evaluation.from_handle(h)
-    elif v == ccs_object_type.Tuner:
-      return Tuner.from_handle(h)
+      return Evaluation.from_handle(h, retain = retain, auto_release = auto_release)
+    elif v == ccs_object_type.TUNER:
+      return Tuner.from_handle(h, retain = retain, auto_release = auto_release)
     else:
       raise Error(ccs_error(ccs_error.INVALID_OBJECT))
 
+  def set_destroy_callback(self, callback, user_data = None):
+    _set_destroy_callback(self.handle, callback, user_data = user_data)
+
+_callbacks = {}
+
+def _set_destroy_callback(handle, callback, user_data = None):
+  if callback is None:
+    raise Error(ccs_error(ccs_error.INVALID_VALUE))
+  ptr = ct.c_int(32)
+  def cb_wrapper(obj, data):
+    try:
+      callback(Object.from_handle(obj), data)
+      del _callbacks[ct.addressof(ptr)]
+    except Error as e:
+      None
+  cb_wrapper_func = ccs_object_destroy_callback_type(cb_wrapper)
+  res = ccs_object_set_destroy_callback(handle, cb_wrapper_func, user_data)
+  Error.check(res)
+  _callbacks[ct.addressof(ptr)] = (cb_wrapper_func, user_data, ptr)
+
+
 _ccs_id = 0
 def _ccs_get_id():
   global _ccs_id

bindings/python/cconfigspace/configuration.py

@@ -17,7 +17,8 @@ ccs_configuration_hash = _ccs_get_function("ccs_configuration_hash", [ccs_config
 ccs_configuration_cmp = _ccs_get_function("ccs_configuration_cmp", [ccs_configuration, ccs_configuration, ct.POINTER(ccs_int)])
 
 class Configuration(Object):
-  def __init__(self, handle = None, retain = False, configuration_space = None, values = None, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               configuration_space = None, values = None, user_data = None):
     if handle is None:
       count = 0
       if values:
@@ -32,11 +33,11 @@ class Configuration(Object):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
-    return cls(handle = handle, retain = True)
+  def from_handle(cls, handle, retain = True, auto_release = True):
+    return cls(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def user_data(self):

bindings/python/cconfigspace/configuration_space.py

@@ -29,18 +29,19 @@ ccs_configuration_space_sample = _ccs_get_function("ccs_configuration_space_samp
 ccs_configuration_space_samples = _ccs_get_function("ccs_configuration_space_samples", [ccs_configuration_space, ct.c_size_t, ct.POINTER(ccs_configuration)])
 
 class ConfigurationSpace(Context):
-  def __init__(self, handle = None, retain = False, name = "", user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = "", user_data = None):
     if handle is None:
       handle = ccs_configuration_space()
       res = ccs_create_configuration_space(str.encode(name), user_data, ct.byref(handle))
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
-    return cls(handle = handle, retain = True)
+  def from_handle(cls, handle, retain = True, auto_release = True):
+    return cls(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def rng(self):

bindings/python/cconfigspace/distribution.py

@@ -27,21 +27,21 @@ ccs_distribution_samples = _ccs_get_function("ccs_distribution_samples", [ccs_di
 class Distribution(Object):
 
   @classmethod
-  def from_handle(cls, handle):
+  def from_handle(cls, handle, retain = True, auto_release = True):
     v = ccs_distribution_type(0)
     res = ccs_distribution_get_type(handle, ct.byref(v))
     Error.check(res)
     v = v.value
     if v == ccs_distribution_type.UNIFORM:
-      return UniformDistribution(handle = handle, retain = True)
+      return UniformDistribution(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_distribution_type.NORMAL:
-      return NormalDistribution(handle = handle, retain = True)
+      return NormalDistribution(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_distribution_type.ROULETTE:
-      return RouletteDistribution(handle = handle, retain = True)
+      return RouletteDistribution(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_distribution_type.MIXTURE:
-      return MixtureDistribution(handle = handle, retain = True)
+      return MixtureDistribution(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_distribution_type.MULTIVARIATE:
-      return MultivariateDistribution(handle = handle, retain = True)
+      return MultivariateDistribution(handle = handle, retain = retain, auto_release = auto_release)
     else:
       raise Error(ccs_error(ccs_error.INVALID_DISTRIBUTION))
 
@@ -134,7 +134,8 @@ ccs_create_uniform_float_distribution = _ccs_get_function("ccs_create_uniform_fl
 ccs_uniform_distribution_get_parameters = _ccs_get_function("ccs_uniform_distribution_get_parameters", [ccs_distribution, ct.POINTER(ccs_numeric), ct.POINTER(ccs_numeric), ct.POINTER(ccs_scale_type), ct.POINTER(ccs_numeric)])
 
 class UniformDistribution(Distribution):
-  def __init__(self, handle = None, retain = False, data_type = NUM_FLOAT, lower = 0.0, upper = 1.0, scale = ccs_scale_type.LINEAR, quantization = 0.0):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               data_type = NUM_FLOAT, lower = 0.0, upper = 1.0, scale = ccs_scale_type.LINEAR, quantization = 0.0):
     if handle is None:
       handle = ccs_distribution(0)
       if data_type == NUM_FLOAT:
@@ -146,7 +147,7 @@ class UniformDistribution(Distribution):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
   def int(cls, lower, upper, scale = ccs_scale_type.LINEAR, quantization = 0):
@@ -229,7 +230,8 @@ ccs_create_normal_float_distribution = _ccs_get_function("ccs_create_normal_floa
 ccs_normal_distribution_get_parameters = _ccs_get_function("ccs_normal_distribution_get_parameters", [ccs_distribution, ct.POINTER(ccs_float), ct.POINTER(ccs_float), ct.POINTER(ccs_scale_type), ct.POINTER(ccs_numeric)])
 
 class NormalDistribution(Distribution):
-  def __init__(self, handle = None, retain = False, data_type = NUM_FLOAT, mu = 0.0, sigma = 1.0, scale = ccs_scale_type.LINEAR, quantization = 0.0):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               data_type = NUM_FLOAT, mu = 0.0, sigma = 1.0, scale = ccs_scale_type.LINEAR, quantization = 0.0):
     if handle is None:
       handle = ccs_distribution(0)
       if data_type == NUM_FLOAT:
@@ -241,7 +243,7 @@ class NormalDistribution(Distribution):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
   def int(cls, mu, sigma, scale = ccs_scale_type.LINEAR, quantization = 0):
@@ -311,7 +313,8 @@ ccs_roulette_distribution_get_num_areas = _ccs_get_function("ccs_roulette_distri
 ccs_roulette_distribution_get_areas = _ccs_get_function("ccs_roulette_distribution_get_areas", [ccs_distribution, ct.c_size_t, ct.POINTER(ccs_float), ct.POINTER(ct.c_size_t)])
 
 class RouletteDistribution(Distribution):
-  def __init__(self, handle = None, retain = False, areas = []):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               areas = []):
     if handle is None:
       handle = ccs_distribution(0)
       v = (ccs_float * len(areas))(*areas)
@@ -319,7 +322,7 @@ class RouletteDistribution(Distribution):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def data_type(self):
@@ -354,7 +357,8 @@ ccs_mixture_distribution_get_distributions = _ccs_get_function("ccs_mixture_dist
 ccs_mixture_distribution_get_weights = _ccs_get_function("ccs_mixture_distribution_get_weights", [ccs_distribution, ct.c_size_t, ct.POINTER(ccs_float), ct.POINTER(ct.c_size_t)])
 
 class MixtureDistribution(Distribution):
-  def __init__(self, handle = None, retain = False, distributions = [], weights = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               distributions = [], weights = None):
     if handle is None:
       handle = ccs_distribution(0)
       if weights is None:
@@ -365,7 +369,7 @@ class MixtureDistribution(Distribution):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def num_distributions(self):
@@ -402,7 +406,8 @@ ccs_multivariate_distribution_get_num_distributions = _ccs_get_function("ccs_mul
 ccs_multivariate_distribution_get_distributions = _ccs_get_function("ccs_multivariate_distribution_get_distributions", [ccs_distribution, ct.c_size_t, ct.POINTER(ccs_distribution), ct.POINTER(ct.c_size_t)])
 
 class MultivariateDistribution(Distribution):
-  def __init__(self, handle = None, retain = False, distributions = [], weights = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               distributions = [], weights = None):
     if handle is None:
       handle = ccs_distribution(0)
       ds = (ccs_distribution * len(distributions))(*[x.handle.value for x in distributions])
@@ -410,7 +415,7 @@ class MultivariateDistribution(Distribution):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def num_distributions(self):

bindings/python/cconfigspace/evaluation.py

@@ -28,7 +28,8 @@ ccs_evaluation_get_objective_values = _ccs_get_function("ccs_evaluation_get_obje
 ccs_evaluation_cmp = _ccs_get_function("ccs_evaluation_cmp", [ccs_evaluation, ccs_evaluation, ct.POINTER(ccs_comparison)])
 
 class Evaluation(Object):
-  def __init__(self, handle = None, retain = False, objective_space = None, configuration = None, error = ccs_error.SUCCESS, values = None, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               objective_space = None, configuration = None, error = ccs_error.SUCCESS, values = None, user_data = None):
     if handle is None:
       count = 0
       if values:
@@ -43,11 +44,11 @@ class Evaluation(Object):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
-    return cls(handle = handle, retain = True)
+  def from_handle(cls, handle, retain = True, auto_release = True):
+    return cls(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def user_data(self):

bindings/python/cconfigspace/expression.py

@@ -69,7 +69,8 @@ ccs_expression_get_hyperparameters = _ccs_get_function("ccs_expression_get_hyper
 ccs_expression_check_context = _ccs_get_function("ccs_expression_check_context", [ccs_expression, ccs_context])
 
 class Expression(Object):
-  def  __init__(self, handle = None, retain = False, t = None, nodes = []):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               t = None, nodes = []):
     if handle is None:
       sz = len(nodes)
       handle = ccs_expression()
@@ -80,22 +81,22 @@ class Expression(Object):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
+  def from_handle(cls, handle, retain = True, auto_release = True):
     v = ccs_expression_type(0)
     res = ccs_expression_get_type(handle, ct.byref(v))
     Error.check(res)
     v = v.value
     if v == ccs_expression_type.LIST:
-      return List(handle = handle, retain = True)
+      return List(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_expression_type.LITERAL:
-      return Literal(handle = handle, retain = True)
+      return Literal(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_expression_type.VARIABLE:
-      return Variable(handle = handle, retain = True)
+      return Variable(handle = handle, retain = retain, auto_release = auto_release)
     else:
-      return cls(handle = handle, retain = True)
+      return cls(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
   def binary(cls, t, left, right):
@@ -208,7 +209,8 @@ class Literal(Expression):
   true_aymbol = ccs_terminal_symbols[ccs_terminal_type.TERM_TRUE]
   false_symbol = ccs_terminal_symbols[ccs_terminal_type.TERM_FALSE]
 
-  def __init__(self, handle = None, retain = False, value = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               value = None):
     if handle is None:
       handle = ccs_expression()
       pv = ccs_datum(value)
@@ -219,7 +221,7 @@ class Literal(Expression):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
  
   @property 
   def value(self):
@@ -246,14 +248,15 @@ class Literal(Expression):
 
 
 class Variable(Expression):
-  def __init__(self, handle = None, retain = False, hyperparameter = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               hyperparameter = None):
     if handle is None:
       handle = ccs_expression()
       res = ccs_create_variable(hyperparameter.handle, ct.byref(handle))
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
   
   @property 
   def hyperparameter(self):
@@ -270,11 +273,12 @@ class Variable(Expression):
 
 
 class List(Expression):
-  def __init__(self, handle = None, retain = False, values = []):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               values = []):
     if handle is None:
       super().__init__(t = ccs_expression_type.LIST, nodes = values)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
   
   def eval(self, index, context = None, values = None):
     if context and values:

bindings/python/cconfigspace/hyperparameter.py

@@ -25,19 +25,19 @@ ccs_hyperparameter_samples = _ccs_get_function("ccs_hyperparameter_samples", [cc
 class Hyperparameter(Object):
 
   @classmethod
-  def from_handle(cls, handle):
+  def from_handle(cls, handle, retain = True, auto_release = True):
     v = ccs_hyperparameter_type(0)
     res = ccs_hyperparameter_get_type(handle, ct.byref(v))
     Error.check(res)
     v = v.value
     if v == ccs_hyperparameter_type.NUMERICAL:
-      return NumericalHyperparameter(handle = handle, retain = True)
+      return NumericalHyperparameter(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_hyperparameter_type.CATEGORICAL:
-      return CategoricalHyperparameter(handle = handle, retain = True)
+      return CategoricalHyperparameter(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_hyperparameter_type.ORDINAL:
-      return OrdinalHyperparameter(handle = handle, retain = True)
+      return OrdinalHyperparameter(handle = handle, retain = retain, auto_release = auto_release)
     elif v == ccs_hyperparameter_type.DISCRETE:
-      return DiscreteHyperparameter(handle = handle, retain = True)
+      return DiscreteHyperparameter(handle = handle, retain = retain, auto_release = auto_release)
     else:
       raise Error(ccs_error(ccs_error.INVALID_HYPERPARAMETER))
 
@@ -144,7 +144,8 @@ ccs_create_numerical_hyperparameter = _ccs_get_function("ccs_create_numerical_hy
 ccs_numerical_hyperparameter_get_parameters = _ccs_get_function("ccs_numerical_hyperparameter_get_parameters", [ccs_hyperparameter, ct.POINTER(ccs_numeric_type), ct.POINTER(ccs_numeric), ct.POINTER(ccs_numeric), ct.POINTER(ccs_numeric)])
 
 class NumericalHyperparameter(Hyperparameter):
-  def __init__(self, handle = None, retain = False, name = None, data_type = ccs_numeric_type.NUM_FLOAT, lower = 0.0, upper = 1.0, quantization = 0.0, default = None, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = None, data_type = ccs_numeric_type.NUM_FLOAT, lower = 0.0, upper = 1.0, quantization = 0.0, default = None, user_data = None):
     if handle is None:
       if name is None:
         name = NumericalHyperparameter.default_name()
@@ -171,7 +172,7 @@ class NumericalHyperparameter(Hyperparameter):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
   def int(cls, lower, upper, name = None, quantization = 0, default = None, user_data = None):
@@ -243,7 +244,8 @@ ccs_create_categorical_hyperparameter = _ccs_get_function("ccs_create_categorica
 ccs_categorical_hyperparameter_get_values = _ccs_get_function("ccs_categorical_hyperparameter_get_values", [ccs_hyperparameter, ct.c_size_t, ct.POINTER(ccs_datum), ct.POINTER(ct.c_size_t)])
 
 class CategoricalHyperparameter(Hyperparameter):
-  def __init__(self, handle = None, retain = False, name = None, values = [], default_index = 0, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = None, values = [], default_index = 0, user_data = None):
     if handle is None:
       if name is None:
         name = NumericalHyperparameter.default_name()
@@ -256,7 +258,7 @@ class CategoricalHyperparameter(Hyperparameter):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def values(self):
@@ -273,7 +275,8 @@ ccs_ordinal_hyperparameter_compare_values = _ccs_get_function("ccs_ordinal_hyper
 ccs_ordinal_hyperparameter_get_values = _ccs_get_function("ccs_ordinal_hyperparameter_get_values", [ccs_hyperparameter, ct.c_size_t, ct.POINTER(ccs_datum), ct.POINTER(ct.c_size_t)])
 
 class OrdinalHyperparameter(Hyperparameter):
-  def __init__(self, handle = None, retain = False, name = None, values = [], default_index = 0, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = None, values = [], default_index = 0, user_data = None):
     if handle is None:
       if name is None:
         name = NumericalHyperparameter.default_name()
@@ -286,7 +289,7 @@ class OrdinalHyperparameter(Hyperparameter):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def values(self):
@@ -316,7 +319,8 @@ ccs_create_discrete_hyperparameter = _ccs_get_function("ccs_create_discrete_hype
 ccs_discrete_hyperparameter_get_values = _ccs_get_function("ccs_discrete_hyperparameter_get_values", [ccs_hyperparameter, ct.c_size_t, ct.POINTER(ccs_datum), ct.POINTER(ct.c_size_t)])
 
 class DiscreteHyperparameter(Hyperparameter):
-  def __init__(self, handle = None, retain = False, name = None, values = [], default_index = 0, user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = None, values = [], default_index = 0, user_data = None):
     if handle is None:
       if name is None:
         name = NumericalHyperparameter.default_name()
@@ -329,7 +333,7 @@ class DiscreteHyperparameter(Hyperparameter):
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @property
   def values(self):

bindings/python/cconfigspace/objective_space.py

@@ -22,18 +22,19 @@ ccs_objective_space_get_objective = _ccs_get_function("ccs_objective_space_get_o
 ccs_objective_space_get_objectives = _ccs_get_function("ccs_objective_space_get_objectives", [ccs_objective_space, ct.c_size_t, ct.POINTER(ccs_expression), ct.POINTER(ccs_objective_type), ct.POINTER(ct.c_size_t)])
 
 class ObjectiveSpace(Context):
-  def __init__(self, handle = None, retain = False, name = "", user_data = None):
+  def __init__(self, handle = None, retain = False, auto_release = True,
+               name = "", user_data = None):
     if handle is None:
       handle = ccs_objective_space()
       res = ccs_create_objective_space(str.encode(name), user_data, ct.byref(handle))
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
-    return cls(handle = handle, retain = True)
+  def from_handle(cls, handle, retain = True, auto_release = True):
+    return cls(handle = handle, retain = retain, auto_release = auto_release)
 
   def add_hyperparameter(self, hyperparameter):
     res = ccs_objective_space_add_hyperparameter(self.handle, hyperparameter.handle)

bindings/python/cconfigspace/rng.py

@@ -10,18 +10,18 @@ ccs_rng_min = _ccs_get_function("ccs_rng_min", [ccs_rng, ct.POINTER(ct.c_ulong)]
 ccs_rng_max = _ccs_get_function("ccs_rng_max", [ccs_rng, ct.POINTER(ct.c_ulong)])
 
 class Rng(Object):
-  def __init__(self, handle = None, retain = False):
+  def __init__(self, handle = None, retain = False, auto_release = True):
     if handle is None:
       handle = ccs_rng(0)
       res = ccs_rng_create(ct.byref(handle))
       Error.check(res)
       super().__init__(handle = handle, retain = False)
     else:
-      super().__init__(handle = handle, retain = retain)
+      super().__init__(handle = handle, retain = retain, auto_release = auto_release)
 
   @classmethod
-  def from_handle(cls, handle):
-    return cls(handle, retain = True)
+  def from_handle(cls, handle, retain = True, auto_release = True):
+    return cls(handle, retain = retain, auto_release = auto_release)
 
   def __setattr__(self, name, value):
     if name == 'seed':

bindings/python/test/test_tuner.py

@@ -24,6 +24,7 @@ class TestTuner(unittest.TestCase):
   def test_create_random(self):
     (cs, os) = self.create_tuning_problem()
     t = ccs.RandomTuner(name = "tuner", configuration_space = cs, objective_space = os)
+    t2 = ccs.Object.from_handle(t.handle)
     self.assertEqual("tuner", t.name)
     self.assertEqual(ccs.TUNER_RANDOM, t.type)
     func = lambda x, y, z: [(x-2)*(x-2), sin(z+y)]
@@ -85,6 +86,7 @@ class TestTuner(unittest.TestCase):
 
     (cs, os) = self.create_tuning_problem()
     t = ccs.UserDefinedTuner(name = "tuner", configuration_space = cs, objective_space = os, delete = delete, ask = ask, tell = tell, get_optimums = get_optimums, get_history = get_history)
+    t2 = ccs.Object.from_handle(t.handle)
     self.assertEqual("tuner", t.name)
     self.assertEqual(ccs.TUNER_USER_DEFINED, t.type)
     self.assertEqual(cs.handle.value, t.configuration_space.handle.value)

bindings/ruby/lib/cconfigspace/base.rb

@@ -339,6 +339,8 @@ module CCS
   attach_function :ccs_release_object, [:ccs_object_t], :ccs_result_t
   attach_function :ccs_object_get_type, [:ccs_object_t, :pointer], :ccs_result_t
   attach_function :ccs_object_get_refcount, [:ccs_object_t, :pointer], :ccs_result_t
+  callback :ccs_object_release_callback, [:ccs_object_t, :pointer], :void
+  attach_function :ccs_object_set_destroy_callback, [:ccs_object_t, :ccs_object_release_callback, :pointer], :ccs_result_t
 
   class << self
     alias version ccs_get_version
@@ -423,34 +425,58 @@ module CCS
       ptr = MemoryPointer::new(:ccs_object_type_t)
       res = CCS.ccs_object_get_type(handle, ptr)
       CCS.error_check(res)
+      ptr2 = MemoryPointer::new(:int32)
+      res = CCS.ccs_object_get_refcount(handle, ptr2)
+      CCS.error_check(res)
+      opts = ptr2.read_int32 == 0 ? {retain: false, auto_release: false} : {}
       case ptr.read_ccs_object_type_t
       when :CCS_RNG
-        CCS::Rng::from_handle(handle)
+        CCS::Rng
       when :CCS_DISTRIBUTION
-        CCS::Distribution::from_handle(handle)
+        CCS::Distribution
       when :CCS_HYPERPARAMETER
-        CCS::Hyperparameter::from_handle(handle)
+        CCS::Hyperparameter
       when :CCS_EXPRESSION
-        CCS::Expression::from_handle(handle)
+        CCS::Expression
       when :CCS_CONFIGURATION_SPACE
-        CCS::ConfigurationSpace::from_handle(handle)
+        CCS::ConfigurationSpace
       when :CCS_CONFIGURATION
-        CCS::Configuration::from_handle(handle)
+        CCS::Configuration
       when :CCS_OBJECTIVE_SPACE
-        CCS::ObjectiveSpace::from_handle(handle)
+        CCS::ObjectiveSpace
       when :CCS_EVALUATION
-        CCS::Evaluation::from_handle(handle)
+        CCS::Evaluation
       when :CCS_TUNER
-        CCS::Tuner::from_handle(handle)
+        CCS::Tuner
       else
         raise CCSError, :CCS_INVALID_OBJECT
-      end
+      end.from_handle(handle, **opts)
     end
 
     def to_ptr
       @handle
     end
 
+    def set_destroy_callback(user_data: nil, &block)
+      CCS.set_destroy_callback(@handle, user_data: user_data, &block)
+      self
+    end
+
+  end
+
+  @@callbacks = {}
+  def self.set_destroy_callback(handle, user_data: nil, &block)
+    if block
+      cb_wrapper = lambda { |object, data|
+        block.call(Object.from_handle(object), data)
+        @@callbacks.delete(cb_wrapper)
+      }
+      @@callbacks[cb_wrapper] = user_data
+    else
+      cb_wrapper = nil
+    end
+    res = CCS.ccs_object_set_destroy_callback(handle, cb_wrapper, user_data)
+    CCS.error_check(res)
   end
 
 end

bindings/ruby/lib/cconfigspace/configuration.rb

@@ -17,9 +17,10 @@ module CCS
     add_property :hash, :ccs_hash_t, :ccs_configuration_hash, memoize: false
     add_handle_property :configuration_space, :ccs_configuration_space_t, :ccs_configuration_get_configuration_space, memoize: true
 
-    def initialize(handle = nil, retain: false, configuration_space: nil,  values: nil, user_data: nil)
+    def initialize(handle = nil, retain: false, auto_release: true,
+                   configuration_space: nil,  values: nil, user_data: nil)
       if (handle)
-        super(handle, retain: retain)
+        super(handle, retain: retain, auto_release: auto_release)
       else
         if values
           count = values.size
@@ -37,8 +38,8 @@ module CCS
       end
     end
 
-    def self.from_handle(handle)
-      self::new(handle, retain: true)
+    def self.from_handle(handle, retain: true, auto_release: true)
+      self::new(handle, retain: retain, auto_release: auto_release)
     end
 
     def set_value(hyperparameter, value)

bindings/ruby/lib/cconfigspace/configuration_space.rb

@@ -21,9 +21,10 @@ module CCS