Add nogil in one place.

Author: Andy-Jost

cuda_core/cuda/core/experimental/_memory/_dmr.pyx

@@ -14,7 +14,6 @@ from cuda.core.experimental._memory cimport _ipc
 from cuda.core.experimental._memory._ipc cimport IPCAllocationHandle, IPCData
 from cuda.core.experimental._stream cimport default_stream, Stream
 from cuda.core.experimental._utils.cuda_utils cimport (
-    _check_driver_error as raise_if_driver_error,
     check_or_create_options,
     HANDLE_RETURN,
 )
@@ -75,9 +74,8 @@ class DeviceMemoryResourceAttributes:
                 mr = self._mr()
                 if mr is None:
                     raise RuntimeError("DeviceMemoryResource is expired")
-                # TODO: this implementation does not allow lowering to Cython + nogil
-                err, value = driver.cuMemPoolGetAttribute(mr.handle, attr_enum)
-                raise_if_driver_error(err)
+                value = DMRA_getattribute(<cydriver.CUmemoryPool><uintptr_t> mr.handle,
+                                          <cydriver.CUmemPool_attribute><uintptr_t> attr_enum)
                 return property_type(value)
             return property(fget=fget, doc=stub.__doc__)
         return decorator
@@ -117,6 +115,15 @@ class DeviceMemoryResourceAttributes:
     del mempool_property
 
 
+cdef int DMRA_getattribute(
+    cydriver.CUmemoryPool pool_handle, cydriver.CUmemPool_attribute attr_enum
+):
+    cdef int value
+    with nogil:
+        HANDLE_RETURN(cydriver.cuMemPoolGetAttribute(pool_handle, attr_enum, <void *> &value))
+    return value
+
+
 cdef class DeviceMemoryResource(MemoryResource):
     """
     Create a device memory resource managing a stream-ordered memory pool.