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_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H 20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include "src/core/lib/transport/transport.h" 25 26 struct grpc_chttp2_incoming_metadata_buffer { grpc_chttp2_incoming_metadata_buffergrpc_chttp2_incoming_metadata_buffer27 explicit grpc_chttp2_incoming_metadata_buffer(grpc_core::Arena* arena) 28 : arena(arena) { 29 grpc_metadata_batch_init(&batch); 30 batch.deadline = GRPC_MILLIS_INF_FUTURE; 31 } ~grpc_chttp2_incoming_metadata_buffergrpc_chttp2_incoming_metadata_buffer32 ~grpc_chttp2_incoming_metadata_buffer() { 33 grpc_metadata_batch_destroy(&batch); 34 } 35 36 static constexpr size_t kPreallocatedMDElem = 10; 37 38 grpc_core::Arena* arena; 39 size_t size = 0; // total size of metadata. 40 size_t count = 0; // minimum of count of metadata and kPreallocatedMDElem. 41 // These preallocated mdelems are used while count < kPreallocatedMDElem. 42 grpc_linked_mdelem preallocated_mdelems[kPreallocatedMDElem]; 43 grpc_metadata_batch batch; 44 }; 45 46 void grpc_chttp2_incoming_metadata_buffer_publish( 47 grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch); 48 49 grpc_error* grpc_chttp2_incoming_metadata_buffer_add( 50 grpc_chttp2_incoming_metadata_buffer* buffer, 51 grpc_mdelem elem) GRPC_MUST_USE_RESULT; 52 grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add( 53 grpc_chttp2_incoming_metadata_buffer* buffer, 54 grpc_mdelem elem) GRPC_MUST_USE_RESULT; 55 void grpc_chttp2_incoming_metadata_buffer_set_deadline( 56 grpc_chttp2_incoming_metadata_buffer* buffer, grpc_millis deadline); 57 58 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H */ 59