os_windows.inline.hpp revision 141:fcbfc50865ab 
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
25inline const char* os::file_separator()                { return "\\"; }
26inline const char* os::line_separator()                { return "\r\n"; }
27inline const char* os::path_separator()                { return ";"; }
28
29inline const char* os::jlong_format_specifier()        { return "%I64d"; }
30inline const char* os::julong_format_specifier()       { return "%I64u"; }
31
32// File names are case-insensitive on windows only
33inline 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
38inline void os::loop_breaker(int attempts) {}
39
40inline bool os::obsolete_option(const JavaVMOption *option) {
41  return false;
42}
43
44inline bool os::uses_stack_guard_pages() {
45  return os::win32::is_nt();
46}
47
48inline bool os::allocate_stack_guard_pages() {
49  assert(uses_stack_guard_pages(), "sanity check");
50  return true;
51}
52
53inline 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.
62inline 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}
72
73inline bool os::numa_has_static_binding()   { return true;   }
74inline bool os::numa_has_group_homing()     { return false;  }
75