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src/share/vm/runtime/threadLocalStorage.cpp@7ab5f6318694 (annotated)

src/share/vm/runtime/threadLocalStorage.cpp

Sun, 01 Jan 2012 11:17:59 -0500

author

phh

date

Sun, 01 Jan 2012 11:17:59 -0500

changeset 3378

7ab5f6318694

parent 3156

f08d439fab8c

child 4299

f34d701e952e

permissions

-rw-r--r--

7125934: Add a fast unordered timestamp capability to Hotspot on x86/x64
Summary: Add rdtsc detection and inline generation.
Reviewed-by: kamg, dholmes
Contributed-by: karen.kinnear@oracle.com

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "runtime/threadLocalStorage.hpp"
stefank@2314	27	#ifdef TARGET_OS_FAMILY_linux
stefank@2314	28	# include "os_linux.inline.hpp"
stefank@2314	29	# include "thread_linux.inline.hpp"
stefank@2314	30	#endif
stefank@2314	31	#ifdef TARGET_OS_FAMILY_solaris
stefank@2314	32	# include "os_solaris.inline.hpp"
stefank@2314	33	# include "thread_solaris.inline.hpp"
stefank@2314	34	#endif
stefank@2314	35	#ifdef TARGET_OS_FAMILY_windows
stefank@2314	36	# include "os_windows.inline.hpp"
stefank@2314	37	# include "thread_windows.inline.hpp"
stefank@2314	38	#endif
never@3156	39	#ifdef TARGET_OS_FAMILY_bsd
never@3156	40	# include "os_bsd.inline.hpp"
never@3156	41	# include "thread_bsd.inline.hpp"
never@3156	42	#endif
duke@435	43
duke@435	44	// static member initialization
duke@435	45	int ThreadLocalStorage::_thread_index = -1;
duke@435	46
duke@435	47	Thread* ThreadLocalStorage::get_thread_slow() {
duke@435	48	return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index());
duke@435	49	}
duke@435	50
duke@435	51	void ThreadLocalStorage::set_thread(Thread* thread) {
duke@435	52	pd_set_thread(thread);
duke@435	53
duke@435	54	// The following ensure that any optimization tricks we have tried
duke@435	55	// did not backfire on us:
duke@435	56	guarantee(get_thread() == thread, "must be the same thread, quickly");
duke@435	57	guarantee(get_thread_slow() == thread, "must be the same thread, slowly");
duke@435	58	}
duke@435	59
duke@435	60	void ThreadLocalStorage::init() {
kamg@677	61	assert(!is_initialized(),
kamg@677	62	"More than one attempt to initialize threadLocalStorage");
duke@435	63	pd_init();
duke@435	64	set_thread_index(os::allocate_thread_local_storage());
duke@435	65	generate_code_for_get_thread();
duke@435	66	}
kamg@677	67
kamg@677	68	bool ThreadLocalStorage::is_initialized() {
kamg@677	69	return (thread_index() != -1);
kamg@677	70	}