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comparison src/os/windows/vm/os_windows.inline.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children fcbfc50865ab
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 inline const char* os::file_separator() { return "\\"; }
26 inline const char* os::line_separator() { return "\r\n"; }
27 inline const char* os::path_separator() { return ";"; }
28
29 inline const char* os::jlong_format_specifier() { return "%I64d"; }
30 inline const char* os::julong_format_specifier() { return "%I64u"; }
31
32 // File names are case-insensitive on windows only
33 inline int os::file_name_strcmp(const char* s, const char* t) {
34 return _stricmp(s, t);
35 }
36
37 // Used to improve time-sharing on some systems
38 inline void os::loop_breaker(int attempts) {}
39
40 inline bool os::obsolete_option(const JavaVMOption *option) {
41 return false;
42 }
43
44 inline bool os::uses_stack_guard_pages() {
45 return os::win32::is_nt();
46 }
47
48 inline bool os::allocate_stack_guard_pages() {
49 assert(uses_stack_guard_pages(), "sanity check");
50 return true;
51 }
52
53 inline int os::readdir_buf_size(const char *path)
54 {
55 /* As Windows doesn't use the directory entry buffer passed to
56 os::readdir() this can be as short as possible */
57
58 return 1;
59 }
60
61 // Bang the shadow pages if they need to be touched to be mapped.
62 inline void os::bang_stack_shadow_pages() {
63 // Write to each page of our new frame to force OS mapping.
64 // If we decrement stack pointer more than one page
65 // the OS may not map an intervening page into our space
66 // and may fault on a memory access to interior of our frame.
67 address sp = current_stack_pointer();
68 for (int pages = 1; pages <= StackShadowPages; pages++) {
69 *((int *)(sp - (pages * vm_page_size()))) = 0;
70 }
71 }