1/*
2 * Copyright (c) 1998, 2015, 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.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
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#include "runtime/thread.inline.hpp"
30
31// these inline functions are in a separate file to break an include cycle
32// between Thread and Handle
33
34inline Handle::Handle(oop obj) {
35  if (obj == NULL) {
36    _handle = NULL;
37  } else {
38    _handle = Thread::current()->handle_area()->allocate_handle(obj);
39  }
40}
41
42
43#ifndef ASSERT
44inline Handle::Handle(Thread* thread, oop obj) {
45  assert(thread == Thread::current(), "sanity check");
46  if (obj == NULL) {
47    _handle = NULL;
48  } else {
49    _handle = thread->handle_area()->allocate_handle(obj);
50  }
51}
52#endif // ASSERT
53
54// Constructors for metadata handles
55#define DEF_METADATA_HANDLE_FN(name, type) \
56inline name##Handle::name##Handle(type* obj) : _value(obj), _thread(NULL) {       \
57  if (obj != NULL) {                                                   \
58    assert(((Metadata*)obj)->is_valid(), "obj is valid");              \
59    _thread = Thread::current();                                       \
60    assert (_thread->is_in_stack((address)this), "not on stack?");     \
61    _thread->metadata_handles()->push((Metadata*)obj);                 \
62  }                                                                    \
63}                                                                      \
64inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \
65  if (obj != NULL) {                                                   \
66    assert(((Metadata*)obj)->is_valid(), "obj is valid");              \
67    assert(_thread == Thread::current(), "thread must be current");    \
68    assert (_thread->is_in_stack((address)this), "not on stack?");     \
69    _thread->metadata_handles()->push((Metadata*)obj);                 \
70  }                                                                    \
71}                                                                      \
72
73DEF_METADATA_HANDLE_FN(method, Method)
74DEF_METADATA_HANDLE_FN(constantPool, ConstantPool)
75
76inline HandleMark::HandleMark() {
77  initialize(Thread::current());
78}
79
80
81inline void HandleMark::push() {
82  // This is intentionally a NOP. pop_and_restore will reset
83  // values to the HandleMark further down the stack, typically
84  // in JavaCalls::call_helper.
85  debug_only(_area->_handle_mark_nesting++);
86}
87
88inline void HandleMark::pop_and_restore() {
89  HandleArea* area = _area;   // help compilers with poor alias analysis
90  // Delete later chunks
91  if( _chunk->next() ) {
92    // reset arena size before delete chunks. Otherwise, the total
93    // arena size could exceed total chunk size
94    assert(area->size_in_bytes() > size_in_bytes(), "Sanity check");
95    area->set_size_in_bytes(size_in_bytes());
96    _chunk->next_chop();
97  } else {
98    assert(area->size_in_bytes() == size_in_bytes(), "Sanity check");
99  }
100  // Roll back arena to saved top markers
101  area->_chunk = _chunk;
102  area->_hwm = _hwm;
103  area->_max = _max;
104  debug_only(area->_handle_mark_nesting--);
105}
106
107#endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
108