| /* |
| * |
| * Copyright 2016 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <string.h> |
| |
| #include "src/core/lib/channel/channel_stack.h" |
| #include "src/cpp/common/channel_filter.h" |
| |
| #include <grpcpp/impl/codegen/slice.h> |
| |
| namespace grpc { |
| |
| // MetadataBatch |
| |
| grpc_linked_mdelem* MetadataBatch::AddMetadata(const string& key, |
| const string& value) { |
| grpc_linked_mdelem* storage = new grpc_linked_mdelem; |
| memset(storage, 0, sizeof(grpc_linked_mdelem)); |
| storage->md = grpc_mdelem_from_slices(SliceFromCopiedString(key), |
| SliceFromCopiedString(value)); |
| GRPC_LOG_IF_ERROR("MetadataBatch::AddMetadata", |
| grpc_metadata_batch_link_head(batch_, storage)); |
| return storage; |
| } |
| |
| // ChannelData |
| |
| void ChannelData::StartTransportOp(grpc_channel_element* elem, |
| TransportOp* op) { |
| grpc_channel_next_op(elem, op->op()); |
| } |
| |
| void ChannelData::GetInfo(grpc_channel_element* elem, |
| const grpc_channel_info* channel_info) { |
| grpc_channel_next_get_info(elem, channel_info); |
| } |
| |
| // CallData |
| |
| void CallData::StartTransportStreamOpBatch(grpc_call_element* elem, |
| TransportStreamOpBatch* op) { |
| grpc_call_next_op(elem, op->op()); |
| } |
| |
| void CallData::SetPollsetOrPollsetSet(grpc_call_element* elem, |
| grpc_polling_entity* pollent) { |
| grpc_call_stack_ignore_set_pollset_or_pollset_set(elem, pollent); |
| } |
| |
| // internal code used by RegisterChannelFilter() |
| |
| namespace internal { |
| |
| // Note: Implicitly initialized to nullptr due to static lifetime. |
| std::vector<FilterRecord>* channel_filters; |
| |
| namespace { |
| |
| bool MaybeAddFilter(grpc_channel_stack_builder* builder, void* arg) { |
| const FilterRecord& filter = *static_cast<FilterRecord*>(arg); |
| if (filter.include_filter) { |
| const grpc_channel_args* args = |
| grpc_channel_stack_builder_get_channel_arguments(builder); |
| if (!filter.include_filter(*args)) return true; |
| } |
| return grpc_channel_stack_builder_prepend_filter(builder, &filter.filter, |
| nullptr, nullptr); |
| } |
| |
| } // namespace |
| |
| void ChannelFilterPluginInit() { |
| for (size_t i = 0; i < channel_filters->size(); ++i) { |
| FilterRecord& filter = (*channel_filters)[i]; |
| grpc_channel_init_register_stage(filter.stack_type, filter.priority, |
| MaybeAddFilter, (void*)&filter); |
| } |
| } |
| |
| void ChannelFilterPluginShutdown() {} |
| |
| } // namespace internal |
| |
| } // namespace grpc |