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src/share/vm/runtime/handles.inline.hpp@7ee622712fcf (annotated)

src/share/vm/runtime/handles.inline.hpp

Tue, 04 Mar 2008 09:44:24 -0500

author

sbohne

date

Tue, 04 Mar 2008 09:44:24 -0500

changeset 493

7ee622712fcf

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6666698: EnableBiasedLocking with BiasedLockingStartupDelay can block Watcher thread
Summary: Enqueue VM_EnableBiasedLocking operation asynchronously
Reviewed-by: never, xlu, kbr, acorn

duke@435	1	/*
duke@435	2	* Copyright 1998-2003 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// these inline functions are in a separate file to break an include cycle
duke@435	26	// between Thread and Handle
duke@435	27
duke@435	28	inline Handle::Handle(oop obj) {
duke@435	29	if (obj == NULL) {
duke@435	30	_handle = NULL;
duke@435	31	} else {
duke@435	32	_handle = Thread::current()->handle_area()->allocate_handle(obj);
duke@435	33	}
duke@435	34	}
duke@435	35
duke@435	36
duke@435	37	#ifndef ASSERT
duke@435	38	inline Handle::Handle(Thread* thread, oop obj) {
duke@435	39	assert(thread == Thread::current(), "sanity check");
duke@435	40	if (obj == NULL) {
duke@435	41	_handle = NULL;
duke@435	42	} else {
duke@435	43	_handle = thread->handle_area()->allocate_handle(obj);
duke@435	44	}
duke@435	45	}
duke@435	46	#endif // ASSERT
duke@435	47
duke@435	48
duke@435	49	inline HandleMark::HandleMark() {
duke@435	50	initialize(Thread::current());
duke@435	51	}
duke@435	52
duke@435	53
duke@435	54	inline void HandleMark::push() {
duke@435	55	// This is intentionally a NOP. pop_and_restore will reset
duke@435	56	// values to the HandleMark further down the stack, typically
duke@435	57	// in JavaCalls::call_helper.
duke@435	58	debug_only(_area->_handle_mark_nesting++);
duke@435	59	}
duke@435	60
duke@435	61	inline void HandleMark::pop_and_restore() {
duke@435	62	HandleArea* area = _area; // help compilers with poor alias analysis
duke@435	63	// Delete later chunks
duke@435	64	if( _chunk->next() ) {
duke@435	65	_chunk->next_chop();
duke@435	66	}
duke@435	67	// Roll back arena to saved top markers
duke@435	68	area->_chunk = _chunk;
duke@435	69	area->_hwm = _hwm;
duke@435	70	area->_max = _max;
duke@435	71	NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);)
duke@435	72	debug_only(area->_handle_mark_nesting--);
duke@435	73	}