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comparison src/share/vm/runtime/handles.inline.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1998-2003 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // these inline functions are in a separate file to break an include cycle
26 // between Thread and Handle
27
28 inline Handle::Handle(oop obj) {
29 if (obj == NULL) {
30 _handle = NULL;
31 } else {
32 _handle = Thread::current()->handle_area()->allocate_handle(obj);
33 }
34 }
35
36
37 #ifndef ASSERT
38 inline Handle::Handle(Thread* thread, oop obj) {
39 assert(thread == Thread::current(), "sanity check");
40 if (obj == NULL) {
41 _handle = NULL;
42 } else {
43 _handle = thread->handle_area()->allocate_handle(obj);
44 }
45 }
46 #endif // ASSERT
47
48
49 inline HandleMark::HandleMark() {
50 initialize(Thread::current());
51 }
52
53
54 inline void HandleMark::push() {
55 // This is intentionally a NOP. pop_and_restore will reset
56 // values to the HandleMark further down the stack, typically
57 // in JavaCalls::call_helper.
58 debug_only(_area->_handle_mark_nesting++);
59 }
60
61 inline void HandleMark::pop_and_restore() {
62 HandleArea* area = _area; // help compilers with poor alias analysis
63 // Delete later chunks
64 if( _chunk->next() ) {
65 _chunk->next_chop();
66 }
67 // Roll back arena to saved top markers
68 area->_chunk = _chunk;
69 area->_hwm = _hwm;
70 area->_max = _max;
71 NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);)
72 debug_only(area->_handle_mark_nesting--);
73 }