text: // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
  // This source code is licensed under the BSD-style license found in the
  // LICENSE file in the root directory of this source tree. An additional grant
  // of patent rights can be found in the PATENTS file in the same directory.
  //
  // The following only applies to changes made to this file as part of YugaByte development.
  //
  // Portions Copyright (c) YugaByte, Inc.
  //
  // 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 "yb/util/stats/iostats_context_imp.h"
  
  #include <sstream>
  
  namespace yb {
  
  #ifndef IOS_CROSS_COMPILE
  # ifdef _WIN32
  __declspec(thread) IOStatsContext iostats_context;
  # else
  __thread IOStatsContext iostats_context;
  # endif
  #endif  // IOS_CROSS_COMPILE
  
  void IOStatsContext::Reset(uint64_t _thread_pool_id) {
    thread_pool_id = _thread_pool_id;
    bytes_read = 0;
    bytes_written = 0;
    open_nanos = 0;
    allocate_nanos = 0;
    write_nanos = 0;
    read_nanos = 0;
    range_sync_nanos = 0;
    prepare_write_nanos = 0;
    fsync_nanos = 0;
    logger_nanos = 0;
  }
  
  #define IOSTATS_CONTEXT_OUTPUT(counter)         \
    if (!exclude_zero_counters || counter > 0) {  \
      ss << #counter << " = " << counter << ", "; \
    }
  
  std::string IOStatsContext::ToString(bool exclude_zero_counters) const {
    std::ostringstream ss;
    IOSTATS_CONTEXT_OUTPUT(thread_pool_id);
    IOSTATS_CONTEXT_OUTPUT(bytes_read);
    IOSTATS_CONTEXT_OUTPUT(bytes_written);
    IOSTATS_CONTEXT_OUTPUT(open_nanos);
    IOSTATS_CONTEXT_OUTPUT(allocate_nanos);
    IOSTATS_CONTEXT_OUTPUT(write_nanos);
    IOSTATS_CONTEXT_OUTPUT(read_nanos);
    IOSTATS_CONTEXT_OUTPUT(range_sync_nanos);
    IOSTATS_CONTEXT_OUTPUT(fsync_nanos);
    IOSTATS_CONTEXT_OUTPUT(prepare_write_nanos);
    IOSTATS_CONTEXT_OUTPUT(logger_nanos);
  
    return ss.str();
  }
  
  }  // namespace yb
  