handles.inline.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1998, 2003, Oracle and/or its affiliates. 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
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25// these inline functions are in a separate file to break an include cycle
26// between Thread and Handle
27
28inline 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
38inline 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
49inline HandleMark::HandleMark() {
50  initialize(Thread::current());
51}
52
53
54inline 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
61inline 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}
74