| /* |
| * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jfr/leakprofiler/utilities/granularTimer.hpp" |
| |
| long GranularTimer::_granularity = 0; |
| long GranularTimer::_counter = 0; |
| JfrTicks GranularTimer::_finish_time_ticks = 0; |
| JfrTicks GranularTimer::_start_time_ticks = 0; |
| bool GranularTimer::_finished = false; |
| |
| void GranularTimer::start(jlong duration_ticks, long granularity) { |
| assert(granularity > 0, "granularity must be at least 1"); |
| _granularity = granularity; |
| _counter = granularity; |
| _start_time_ticks = JfrTicks::now(); |
| const jlong end_time_ticks = _start_time_ticks.value() + duration_ticks; |
| _finish_time_ticks = end_time_ticks < 0 ? JfrTicks(max_jlong) : JfrTicks(end_time_ticks); |
| _finished = _finish_time_ticks == _start_time_ticks; |
| assert(_finish_time_ticks.value() >= 0, "invariant"); |
| assert(_finish_time_ticks >= _start_time_ticks, "invariant"); |
| } |
| void GranularTimer::stop() { |
| if (!_finished) { |
| _finish_time_ticks = JfrTicks::now(); |
| } |
| } |
| const JfrTicks& GranularTimer::start_time() { |
| return _start_time_ticks; |
| } |
| |
| const JfrTicks& GranularTimer::end_time() { |
| return _finish_time_ticks; |
| } |
| |
| bool GranularTimer::is_finished() { |
| assert(_granularity != 0, "GranularTimer::is_finished must be called after GranularTimer::start"); |
| if (--_counter == 0) { |
| if (_finished) { |
| // reset so we decrease to zero at next iteration |
| _counter = 1; |
| return true; |
| } |
| if (JfrTicks::now() > _finish_time_ticks) { |
| _finished = true; |
| _counter = 1; |
| return true; |
| } |
| assert(_counter == 0, "invariant"); |
| _counter = _granularity; // restore next batch |
| } |
| return false; |
| } |