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src/share/vm/memory/space.inline.hpp@710a3c8b516e (annotated)

src/share/vm/memory/space.inline.hpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 4153

b9a9ed0f8eeb

parent 0

f90c822e73f8

child 7535

7ae4e26cb1e0

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2000, 2012, 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	#ifndef SHARE_VM_MEMORY_SPACE_INLINE_HPP
aoqi@0	26	#define SHARE_VM_MEMORY_SPACE_INLINE_HPP
aoqi@0	27
aoqi@0	28	#include "gc_interface/collectedHeap.hpp"
aoqi@0	29	#include "memory/space.hpp"
aoqi@0	30	#include "memory/universe.hpp"
aoqi@0	31	#include "runtime/safepoint.hpp"
aoqi@0	32
aoqi@0	33	inline HeapWord* Space::block_start(const void* p) {
aoqi@0	34	return block_start_const(p);
aoqi@0	35	}
aoqi@0	36
aoqi@0	37	inline HeapWord* OffsetTableContigSpace::allocate(size_t size) {
aoqi@0	38	HeapWord* res = ContiguousSpace::allocate(size);
aoqi@0	39	if (res != NULL) {
aoqi@0	40	_offsets.alloc_block(res, size);
aoqi@0	41	}
aoqi@0	42	return res;
aoqi@0	43	}
aoqi@0	44
aoqi@0	45	// Because of the requirement of keeping "_offsets" up to date with the
aoqi@0	46	// allocations, we sequentialize these with a lock. Therefore, best if
aoqi@0	47	// this is used for larger LAB allocations only.
aoqi@0	48	inline HeapWord* OffsetTableContigSpace::par_allocate(size_t size) {
aoqi@0	49	MutexLocker x(&_par_alloc_lock);
aoqi@0	50	// This ought to be just "allocate", because of the lock above, but that
aoqi@0	51	// ContiguousSpace::allocate asserts that either the allocating thread
aoqi@0	52	// holds the heap lock or it is the VM thread and we're at a safepoint.
aoqi@0	53	// The best I (dld) could figure was to put a field in ContiguousSpace
aoqi@0	54	// meaning "locking at safepoint taken care of", and set/reset that
aoqi@0	55	// here. But this will do for now, especially in light of the comment
aoqi@0	56	// above. Perhaps in the future some lock-free manner of keeping the
aoqi@0	57	// coordination.
aoqi@0	58	HeapWord* res = ContiguousSpace::par_allocate(size);
aoqi@0	59	if (res != NULL) {
aoqi@0	60	_offsets.alloc_block(res, size);
aoqi@0	61	}
aoqi@0	62	return res;
aoqi@0	63	}
aoqi@0	64
aoqi@0	65	inline HeapWord*
aoqi@0	66	OffsetTableContigSpace::block_start_const(const void* p) const {
aoqi@0	67	return _offsets.block_start(p);
aoqi@0	68	}
aoqi@0	69
aoqi@0	70	#endif // SHARE_VM_MEMORY_SPACE_INLINE_HPP