1 /* 2 * 3 * Copyright 2017 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_FILTERS_CLIENT_CHANNEL_LB_POLICY_GRPCLB_GRPCLB_CLIENT_STATS_H 20 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_GRPCLB_GRPCLB_CLIENT_STATS_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <grpc/support/atm.h> 25 26 #include "absl/container/inlined_vector.h" 27 28 #include "src/core/lib/gprpp/memory.h" 29 #include "src/core/lib/gprpp/ref_counted.h" 30 #include "src/core/lib/gprpp/sync.h" 31 32 namespace grpc_core { 33 34 class GrpcLbClientStats : public RefCounted<GrpcLbClientStats> { 35 public: 36 struct DropTokenCount { 37 grpc_core::UniquePtr<char> token; 38 int64_t count; 39 DropTokenCountDropTokenCount40 DropTokenCount(grpc_core::UniquePtr<char> token, int64_t count) 41 : token(std::move(token)), count(count) {} 42 }; 43 44 typedef absl::InlinedVector<DropTokenCount, 10> DroppedCallCounts; 45 46 void AddCallStarted(); 47 void AddCallFinished(bool finished_with_client_failed_to_send, 48 bool finished_known_received); 49 50 void AddCallDropped(const char* token); 51 52 void Get(int64_t* num_calls_started, int64_t* num_calls_finished, 53 int64_t* num_calls_finished_with_client_failed_to_send, 54 int64_t* num_calls_finished_known_received, 55 std::unique_ptr<DroppedCallCounts>* drop_token_counts); 56 57 // A destruction function to use as the user_data key when attaching 58 // client stats to a grpc_mdelem. Destroy(void * arg)59 static void Destroy(void* arg) { 60 static_cast<GrpcLbClientStats*>(arg)->Unref(); 61 } 62 63 private: 64 gpr_atm num_calls_started_ = 0; 65 gpr_atm num_calls_finished_ = 0; 66 gpr_atm num_calls_finished_with_client_failed_to_send_ = 0; 67 gpr_atm num_calls_finished_known_received_ = 0; 68 Mutex drop_count_mu_; // Guards drop_token_counts_. 69 std::unique_ptr<DroppedCallCounts> drop_token_counts_; 70 }; 71 72 } // namespace grpc_core 73 74 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_GRPCLB_GRPCLB_CLIENT_STATS_H \ 75 */ 76