1 files changed, 53 insertions, 3 deletions
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pxd.pxi
index 1ba76b7f83..eefc685c0b 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pxd.pxi
@@ -13,9 +13,59 @@
 # limitations under the License.
 
 
+cdef _check_call_error_no_metadata(c_call_error)
+
+
+cdef _check_and_raise_call_error_no_metadata(c_call_error)
+
+
+cdef _check_call_error(c_call_error, metadata)
+
+
+cdef class _CallState:
+
+  cdef grpc_call *c_call
+  cdef set due
+
+
+cdef class _ChannelState:
+
+  cdef object condition
+  cdef grpc_channel *c_channel
+  # A boolean field indicating that the channel is open (if True) or is being
+  # closed (i.e. a call to close is currently executing) or is closed (if
+  # False).
+  # TODO(https://github.com/grpc/grpc/issues/3064): Eliminate "is being closed"
+  # a state in which condition may be acquired by any thread, eliminate this
+  # field and just use the NULLness of c_channel as an indication that the
+  # channel is closed.
+  cdef object open
+
+  # A dict from _BatchOperationTag to _CallState
+  cdef dict integrated_call_states
+  cdef grpc_completion_queue *c_call_completion_queue
+
+  # A set of _CallState
+  cdef set segregated_call_states
+
+  cdef set connectivity_due
+  cdef grpc_completion_queue *c_connectivity_completion_queue
+
+
+cdef class IntegratedCall:
+
+  cdef _ChannelState _channel_state
+  cdef _CallState _call_state
+
+
+cdef class SegregatedCall:
+
+  cdef _ChannelState _channel_state
+  cdef _CallState _call_state
+  cdef grpc_completion_queue *_c_completion_queue
+
+
 cdef class Channel:
 
   cdef grpc_arg_pointer_vtable _vtable
-  cdef grpc_channel *c_channel
-  cdef list references
-  cdef readonly _ArgumentsProcessor _arguments_processor
+  cdef _ChannelState _state