1 /* 2 * 3 * Copyright 2016 gRPC authors. 4 * 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 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 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. 16 * 17 */ 18 19 /* 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 22 * boundaries. 23 */ 24 #include <stdio.h> 25 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" 30 grpc_transport_stream_from_call(grpc_call * call)31grpc_stream* grpc_transport_stream_from_call(grpc_call* call) { 32 grpc_call_stack* cs = grpc_call_get_call_stack(call); 33 for (;;) { 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); 38 if (scc == nullptr) { 39 fprintf(stderr, "No subchannel-call"); 40 fflush(stderr); 41 return nullptr; 42 } 43 cs = scc->GetCallStack(); 44 } else if (el->filter == &grpc_connected_filter) { 45 return grpc_connected_channel_get_stream(el); 46 } else { 47 fprintf(stderr, "Unrecognized filter: %s", el->filter->name); 48 fflush(stderr); 49 return nullptr; 50 } 51 } 52 } 53 grpc_chttp2_stream_from_call(grpc_call * call)54grpc_chttp2_stream* grpc_chttp2_stream_from_call(grpc_call* call) { 55 return reinterpret_cast<grpc_chttp2_stream*>( 56 grpc_transport_stream_from_call(call)); 57 } 58