1 /*
2 * Copyright (c) 2015, 2018, 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 */
74 // Add new segment
75 _segments[_nsegments] = segment;
76 _nsegments++;
77 }
78
79 ZPhysicalMemory ZPhysicalMemory::split(size_t split_size) {
80 // Only splitting of single-segment instances have been implemented.
81 assert(nsegments() == 1, "Can only have one segment");
82 assert(split_size <= size(), "Invalid size");
83 return ZPhysicalMemory(_segments[0].split(split_size));
84 }
85
86 void ZPhysicalMemory::clear() {
87 if (_segments != NULL) {
88 FreeHeap(_segments);
89 _segments = NULL;
90 _nsegments = 0;
91 }
92 }
93
94 ZPhysicalMemoryManager::ZPhysicalMemoryManager(size_t max_capacity, size_t granule_size) :
95 _backing(max_capacity, granule_size),
96 _max_capacity(max_capacity),
97 _current_max_capacity(max_capacity),
98 _capacity(0),
99 _used(0) {}
100
101 bool ZPhysicalMemoryManager::is_initialized() const {
102 return _backing.is_initialized();
103 }
104
105 void ZPhysicalMemoryManager::try_ensure_unused_capacity(size_t size) {
106 const size_t unused = unused_capacity();
107 if (unused >= size) {
108 // Don't try to expand, enough unused capacity available
109 return;
110 }
111
112 const size_t current_max = current_max_capacity();
113 if (_capacity == current_max) {
114 // Don't try to expand, current max capacity reached
115 return;
|
1 /*
2 * Copyright (c) 2015, 2019, 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 */
74 // Add new segment
75 _segments[_nsegments] = segment;
76 _nsegments++;
77 }
78
79 ZPhysicalMemory ZPhysicalMemory::split(size_t split_size) {
80 // Only splitting of single-segment instances have been implemented.
81 assert(nsegments() == 1, "Can only have one segment");
82 assert(split_size <= size(), "Invalid size");
83 return ZPhysicalMemory(_segments[0].split(split_size));
84 }
85
86 void ZPhysicalMemory::clear() {
87 if (_segments != NULL) {
88 FreeHeap(_segments);
89 _segments = NULL;
90 _nsegments = 0;
91 }
92 }
93
94 ZPhysicalMemoryManager::ZPhysicalMemoryManager(size_t max_capacity) :
95 _backing(max_capacity),
96 _max_capacity(max_capacity),
97 _current_max_capacity(max_capacity),
98 _capacity(0),
99 _used(0) {}
100
101 bool ZPhysicalMemoryManager::is_initialized() const {
102 return _backing.is_initialized();
103 }
104
105 void ZPhysicalMemoryManager::try_ensure_unused_capacity(size_t size) {
106 const size_t unused = unused_capacity();
107 if (unused >= size) {
108 // Don't try to expand, enough unused capacity available
109 return;
110 }
111
112 const size_t current_max = current_max_capacity();
113 if (_capacity == current_max) {
114 // Don't try to expand, current max capacity reached
115 return;
|