1 /* 2 * 3 * Copyright 2015 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 #ifndef GRPC_CORE_LIB_SURFACE_CHANNEL_STACK_TYPE_H 20 #define GRPC_CORE_LIB_SURFACE_CHANNEL_STACK_TYPE_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <stdbool.h> 25 26 typedef enum { 27 // normal top-half client channel with load-balancing, connection management 28 GRPC_CLIENT_CHANNEL, 29 // bottom-half of a client channel: everything that happens post-load 30 // balancing (bound to a specific transport) 31 GRPC_CLIENT_SUBCHANNEL, 32 // a permanently broken client channel 33 GRPC_CLIENT_LAME_CHANNEL, 34 // a directly connected client channel (without load-balancing, directly talks 35 // to a transport) 36 GRPC_CLIENT_DIRECT_CHANNEL, 37 // server side channel 38 GRPC_SERVER_CHANNEL, 39 // must be last 40 GRPC_NUM_CHANNEL_STACK_TYPES 41 } grpc_channel_stack_type; 42 43 bool grpc_channel_stack_type_is_client(grpc_channel_stack_type type); 44 45 const char* grpc_channel_stack_type_string(grpc_channel_stack_type type); 46 47 #endif /* GRPC_CORE_LIB_SURFACE_CHANNEL_STACK_TYPE_H */ 48