aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "runtime/os.hpp"
aoqi@0: #include "utilities/ticks.inline.hpp"
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0:  const jlong Ticks::invalid_time_stamp = -2; // 0xFFFF FFFF`FFFF FFFE
aoqi@0: #endif
aoqi@0: 
aoqi@0: void Ticks::stamp() {
aoqi@0:   _stamp_ticks = os::elapsed_counter();
aoqi@0: }
aoqi@0: 
aoqi@0: const Ticks Ticks::now() {
aoqi@0:   Ticks t;
aoqi@0:   t.stamp();
aoqi@0:   return t;
aoqi@0: }
aoqi@0: 
aoqi@0: Tickspan::Tickspan(const Ticks& end, const Ticks& start) {
aoqi@0:   assert(end.value() != Ticks::invalid_time_stamp, "end is unstamped!");
aoqi@0:   assert(start.value() != Ticks::invalid_time_stamp, "start is unstamped!");
aoqi@0: 
aoqi@0:   assert(end >= start, "negative time!");
aoqi@0: 
aoqi@0:   _span_ticks = end.value() - start.value();
aoqi@0: }
aoqi@0: 
aoqi@0: template <typename ReturnType>
aoqi@0: static ReturnType time_conversion(const Tickspan& span, TicksToTimeHelper::Unit unit) {
aoqi@0:   assert(TicksToTimeHelper::SECONDS == unit ||
aoqi@0:          TicksToTimeHelper::MILLISECONDS == unit, "invalid unit!");
aoqi@0: 
aoqi@0:   ReturnType frequency_per_unit = (ReturnType)os::elapsed_frequency() / (ReturnType)unit;
aoqi@0: 
aoqi@0:   return (ReturnType) ((ReturnType)span.value() / frequency_per_unit);
aoqi@0: }
aoqi@0: 
aoqi@0: double TicksToTimeHelper::seconds(const Tickspan& span) {
aoqi@0:   return time_conversion<double>(span, SECONDS);
aoqi@0: }
aoqi@0: 
aoqi@0: jlong TicksToTimeHelper::milliseconds(const Tickspan& span) {
aoqi@0:   return time_conversion<jlong>(span, MILLISECONDS);
aoqi@0: }