| #ifndef QPID_SYS_LATENCYMETRIC_H |
| #define QPID_SYS_LATENCYMETRIC_H |
| |
| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * |
| */ |
| |
| #ifdef QPID_LATENCY_METRIC |
| |
| #include "qpid/sys/IntegerTypes.h" |
| |
| namespace qpid { |
| namespace sys { |
| |
| /** Use this base class to add a timestamp for latency to an object */ |
| struct LatencyMetricTimestamp { |
| LatencyMetricTimestamp() : latency_metric_timestamp(0) {} |
| static void initialize(const LatencyMetricTimestamp&); |
| static void clear(const LatencyMetricTimestamp&); |
| int64_t latency_metric_timestamp; |
| }; |
| |
| /** |
| * Record average latencies, report on destruction. |
| * |
| * For debugging only, use via macros below so it can be compiled out |
| * of production code. |
| */ |
| class LatencyMetric { |
| public: |
| /** msg should be a string literal. */ |
| LatencyMetric(const char* msg, int64_t skip_=0); |
| ~LatencyMetric(); |
| |
| void record(const LatencyMetricTimestamp& start); |
| |
| private: |
| void report(); |
| const char* message; |
| int64_t count, total, skipped, skip; |
| }; |
| |
| }} // namespace qpid::sys |
| |
| #define QPID_LATENCY_INIT(x) ::qpid::sys::LatencyMetricTimestamp::initialize(x) |
| #define QPID_LATENCY_CLEAR(x) ::qpid::sys::LatencyMetricTimestamp::clear(x) |
| #define QPID_LATENCY_RECORD(msg, x) do { \ |
| static ::qpid::sys::LatencyMetric metric__(msg); metric__.record(x); \ |
| } while (false) |
| #define QPID_LATENCY_RECORD_SKIP(msg, x, skip) do { \ |
| static ::qpid::sys::LatencyMetric metric__(msg, skip); metric__.record(x); \ |
| } while (false) |
| |
| |
| #else /* defined QPID_LATENCY_METRIC */ |
| |
| namespace qpid { namespace sys { |
| class LatencyMetricTimestamp {}; |
| }} |
| |
| #define QPID_LATENCY_INIT(x) (void)x |
| #define QPID_LATENCY_CLEAR(x) (void)x |
| #define QPID_LATENCY_RECORD(msg, x) (void)x |
| #define QPID_LATENCY_RECORD_SKIP(msg, x, skip) (void)x |
| |
| #endif /* defined QPID_LATENCY_METRIC */ |
| |
| #endif /*!QPID_SYS_LATENCYMETRIC_H*/ |