handles.inline.hpp revision 3465:d2a62e0f25eb 
1/*
2 * Copyright (c) 1998, 2010, 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
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
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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#ifndef SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
26#define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
27
28#include "runtime/handles.hpp"
29#ifdef TARGET_OS_FAMILY_linux
30# include "thread_linux.inline.hpp"
31#endif
32#ifdef TARGET_OS_FAMILY_solaris
33# include "thread_solaris.inline.hpp"
34#endif
35#ifdef TARGET_OS_FAMILY_windows
36# include "thread_windows.inline.hpp"
37#endif
38#ifdef TARGET_OS_FAMILY_bsd
39# include "thread_bsd.inline.hpp"
40#endif
41
42// these inline functions are in a separate file to break an include cycle
43// between Thread and Handle
44
45inline Handle::Handle(oop obj) {
46  if (obj == NULL) {
47    _handle = NULL;
48  } else {
49    _handle = Thread::current()->handle_area()->allocate_handle(obj);
50  }
51}
52
53
54#ifndef ASSERT
55inline Handle::Handle(Thread* thread, oop obj) {
56  assert(thread == Thread::current(), "sanity check");
57  if (obj == NULL) {
58    _handle = NULL;
59  } else {
60    _handle = thread->handle_area()->allocate_handle(obj);
61  }
62}
63#endif // ASSERT
64
65
66inline HandleMark::HandleMark() {
67  initialize(Thread::current());
68}
69
70
71inline void HandleMark::push() {
72  // This is intentionally a NOP. pop_and_restore will reset
73  // values to the HandleMark further down the stack, typically
74  // in JavaCalls::call_helper.
75  debug_only(_area->_handle_mark_nesting++);
76}
77
78inline void HandleMark::pop_and_restore() {
79  HandleArea* area = _area;   // help compilers with poor alias analysis
80  // Delete later chunks
81  if( _chunk->next() ) {
82    _chunk->next_chop();
83  }
84  // Roll back arena to saved top markers
85  area->_chunk = _chunk;
86  area->_hwm = _hwm;
87  area->_max = _max;
88  area->set_size_in_bytes(_size_in_bytes);
89  debug_only(area->_handle_mark_nesting--);
90}
91
92#endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
93