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src/share/vm/oops/instanceRefKlass.hpp@f95d63e2154a (annotated)

src/share/vm/oops/instanceRefKlass.hpp

Tue, 23 Nov 2010 13:22:55 -0800

author

stefank

date

Tue, 23 Nov 2010 13:22:55 -0800

changeset 2314

f95d63e2154a

parent 1907

c18cbe5936b8

child 2363

7cf1a74771e8

permissions

-rw-r--r--

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

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	#ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
stefank@2314	26	#define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
stefank@2314	27
stefank@2314	28	#include "oops/instanceKlass.hpp"
stefank@2314	29
duke@435	30	// An instanceRefKlass is a specialized instanceKlass for Java
duke@435	31	// classes that are subclasses of java/lang/ref/Reference.
duke@435	32	//
duke@435	33	// These classes are used to implement soft/weak/final/phantom
duke@435	34	// references and finalization, and need special treatment by the
duke@435	35	// garbage collector.
duke@435	36	//
duke@435	37	// During GC discovered reference objects are added (chained) to one
duke@435	38	// of the four lists below, depending on the type of reference.
duke@435	39	// The linked occurs through the next field in class java/lang/ref/Reference.
duke@435	40	//
duke@435	41	// Afterwards, the discovered references are processed in decreasing
duke@435	42	// order of reachability. Reference objects eligible for notification
duke@435	43	// are linked to the static pending_list in class java/lang/ref/Reference,
duke@435	44	// and the pending list lock object in the same class is notified.
duke@435	45
duke@435	46
duke@435	47	class instanceRefKlass: public instanceKlass {
duke@435	48	public:
duke@435	49	// Type testing
duke@435	50	bool oop_is_instanceRef() const { return true; }
duke@435	51
duke@435	52	// Casting from klassOop
duke@435	53	static instanceRefKlass* cast(klassOop k) {
duke@435	54	assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass");
duke@435	55	return (instanceRefKlass*) k->klass_part();
duke@435	56	}
duke@435	57
duke@435	58	// allocation
duke@435	59	DEFINE_ALLOCATE_PERMANENT(instanceRefKlass);
duke@435	60
duke@435	61	// Garbage collection
duke@435	62	int oop_adjust_pointers(oop obj);
duke@435	63	void oop_follow_contents(oop obj);
duke@435	64
duke@435	65	// Parallel Scavenge and Parallel Old
duke@435	66	PARALLEL_GC_DECLS
duke@435	67
duke@435	68	int oop_oop_iterate(oop obj, OopClosure* blk) {
duke@435	69	return oop_oop_iterate_v(obj, blk);
duke@435	70	}
duke@435	71	int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
duke@435	72	return oop_oop_iterate_v_m(obj, blk, mr);
duke@435	73	}
duke@435	74
duke@435	75	#define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
duke@435	76	int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
duke@435	77	int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
duke@435	78
duke@435	79	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
ysr@777	80	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
ysr@777	81
ysr@777	82	#ifndef SERIALGC
ysr@777	83	#define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
ysr@777	84	int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
ysr@777	85
ysr@777	86	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
ysr@777	87	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
ysr@777	88	#endif // !SERIALGC
duke@435	89
duke@435	90	static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock);
duke@435	91	static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock);
duke@435	92
duke@435	93	// Update non-static oop maps so 'referent', 'nextPending' and
duke@435	94	// 'discovered' will look like non-oops
duke@435	95	static void update_nonstatic_oop_maps(klassOop k);
duke@435	96
duke@435	97	public:
duke@435	98	// Verification
duke@435	99	void oop_verify_on(oop obj, outputStream* st);
duke@435	100	};
stefank@2314	101
stefank@2314	102	#endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP