• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/utilities/ticks.cpp@c6211b707068 (annotated)

src/share/vm/utilities/ticks.cpp

Tue, 19 Aug 2014 08:34:25 -0400

author

zgu

date

Tue, 19 Aug 2014 08:34:25 -0400

changeset 7078

c6211b707068

parent 0

f90c822e73f8

child 9858

b985cbb00e68

permissions

-rw-r--r--

8055007: NMT2: emptyStack missing in minimal build
Summary: Refactored emptyStack to a static member of NativeCallStack, which is accessible in minimal build.
Reviewed-by: coleenp, dholmes

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "runtime/os.hpp"
aoqi@0	27	#include "utilities/ticks.inline.hpp"
aoqi@0	28
aoqi@0	29	#ifdef ASSERT
aoqi@0	30	const jlong Ticks::invalid_time_stamp = -2; // 0xFFFF FFFF`FFFF FFFE
aoqi@0	31	#endif
aoqi@0	32
aoqi@0	33	void Ticks::stamp() {
aoqi@0	34	_stamp_ticks = os::elapsed_counter();
aoqi@0	35	}
aoqi@0	36
aoqi@0	37	const Ticks Ticks::now() {
aoqi@0	38	Ticks t;
aoqi@0	39	t.stamp();
aoqi@0	40	return t;
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	Tickspan::Tickspan(const Ticks& end, const Ticks& start) {
aoqi@0	44	assert(end.value() != Ticks::invalid_time_stamp, "end is unstamped!");
aoqi@0	45	assert(start.value() != Ticks::invalid_time_stamp, "start is unstamped!");
aoqi@0	46
aoqi@0	47	assert(end >= start, "negative time!");
aoqi@0	48
aoqi@0	49	_span_ticks = end.value() - start.value();
aoqi@0	50	}
aoqi@0	51
aoqi@0	52	template <typename ReturnType>
aoqi@0	53	static ReturnType time_conversion(const Tickspan& span, TicksToTimeHelper::Unit unit) {
aoqi@0	54	assert(TicksToTimeHelper::SECONDS == unit ||
aoqi@0	55	TicksToTimeHelper::MILLISECONDS == unit, "invalid unit!");
aoqi@0	56
aoqi@0	57	ReturnType frequency_per_unit = (ReturnType)os::elapsed_frequency() / (ReturnType)unit;
aoqi@0	58
aoqi@0	59	return (ReturnType) ((ReturnType)span.value() / frequency_per_unit);
aoqi@0	60	}
aoqi@0	61
aoqi@0	62	double TicksToTimeHelper::seconds(const Tickspan& span) {
aoqi@0	63	return time_conversion<double>(span, SECONDS);
aoqi@0	64	}
aoqi@0	65
aoqi@0	66	jlong TicksToTimeHelper::milliseconds(const Tickspan& span) {
aoqi@0	67	return time_conversion<jlong>(span, MILLISECONDS);
aoqi@0	68	}