Basic direct actor call support in Python (#5991)

python/ray/includes/common.pxd

@@ -171,6 +171,7 @@ cdef extern from "ray/common/buffer.h" namespace "ray" nogil:
 
     cdef cppclass LocalMemoryBuffer(CBuffer):
         LocalMemoryBuffer(uint8_t *data, size_t size, c_bool copy_data)
+        LocalMemoryBuffer(size_t size)
 
 cdef extern from "ray/common/ray_object.h" nogil:
     cdef cppclass CRayObject "ray::RayObject":

python/ray/includes/libcoreworker.pxd

@@ -62,6 +62,7 @@ cdef extern from "ray/core_worker/core_worker.h" nogil:
                         const c_vector[shared_ptr[CRayObject]] &args,
                         const c_vector[CObjectID] &arg_reference_ids,
                         const c_vector[CObjectID] &return_ids,
+                        c_bool is_direct_call,
                         c_vector[shared_ptr[CRayObject]] *returns) nogil,
                     CRayStatus() nogil)
         void Disconnect()

python/ray/includes/unique_ids.pxd

@@ -148,6 +148,8 @@ cdef extern from "ray/common/id.h" namespace "ray" nogil:
 
         c_bool is_put()
 
+        c_bool IsDirectActorType()
+
         int64_t ObjectIndex() const
 
         CTaskID TaskId() const

python/ray/includes/unique_ids.pxi

@@ -176,6 +176,9 @@ cdef class ObjectID(BaseID):
     def hex(self):
         return decode(self.data.Hex())
 
+    def is_direct_actor_type(self):
+        return self.data.IsDirectActorType()
+
     def is_nil(self):
         return self.data.IsNil()