legacy-libs/grpc/deps/grpc/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.h

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