3 * Copyright 2016 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
20 * A collection of 'macros' that help navigating the grpc object hierarchy
21 * Not intended to be robust for main-line code, often cuts across abstraction
26 #include "src/core/ext/filters/client_channel/client_channel.h"
27 #include "src/core/ext/transport/chttp2/transport/internal.h"
28 #include "src/core/lib/channel/connected_channel.h"
29 #include "src/core/lib/surface/call.h"
31 grpc_stream* grpc_transport_stream_from_call(grpc_call* call) {
32 grpc_call_stack* cs = grpc_call_get_call_stack(call);
34 grpc_call_element* el = grpc_call_stack_element(cs, cs->count - 1);
35 if (el->filter == &grpc_client_channel_filter) {
36 grpc_core::RefCountedPtr<grpc_core::SubchannelCall> scc =
37 grpc_client_channel_get_subchannel_call(el);
39 fprintf(stderr, "No subchannel-call");
43 cs = scc->GetCallStack();
44 } else if (el->filter == &grpc_connected_filter) {
45 return grpc_connected_channel_get_stream(el);
47 fprintf(stderr, "Unrecognized filter: %s", el->filter->name);
54 grpc_chttp2_stream* grpc_chttp2_stream_from_call(grpc_call* call) {
55 return reinterpret_cast<grpc_chttp2_stream*>(
56 grpc_transport_stream_from_call(call));