memset_with_concurrent_readers.hpp revision 11658:8a5735c11a84 
1/*
2 * Copyright (c) 2015, 2016, 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 SRC_SHARE_VM_GC_SHARED_MEMSETWITHCONCURRENTREADERS_HPP
26#define SRC_SHARE_VM_GC_SHARED_MEMSETWITHCONCURRENTREADERS_HPP
27
28#include "utilities/macros.hpp"
29
30#include <stddef.h>
31#include <string.h>
32
33// Only used by concurrent collectors.
34#if INCLUDE_ALL_GCS
35
36// Fill a block of memory with value, like memset, but with the
37// understanding that there may be concurrent readers of that memory.
38void memset_with_concurrent_readers(void* to, int value, size_t size);
39
40#ifdef SPARC
41
42// SPARC requires special handling.  See SPARC-specific definition.
43
44#else
45// All others just use memset.
46
47inline void memset_with_concurrent_readers(void* to, int value, size_t size) {
48  ::memset(to, value, size);
49}
50
51#endif // End of target dispatch.
52
53#endif // INCLUDE_ALL_GCS
54
55#endif // SRC_SHARE_VM_GC_SHARED_MEMSETWITHCONCURRENTREADERS_HPP
56