os_windows.inline.hpp revision 1879:f95d63e2154a 
1/*
2 * Copyright (c) 1997, 2010, 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 OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
26#define OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
27
28#include "runtime/atomic.hpp"
29#include "runtime/os.hpp"
30#ifdef TARGET_OS_ARCH_windows_x86
31# include "atomic_windows_x86.inline.hpp"
32# include "orderAccess_windows_x86.inline.hpp"
33#endif
34
35inline const char* os::file_separator()                { return "\\"; }
36inline const char* os::line_separator()                { return "\r\n"; }
37inline const char* os::path_separator()                { return ";"; }
38
39inline const char* os::jlong_format_specifier()        { return "%I64d"; }
40inline const char* os::julong_format_specifier()       { return "%I64u"; }
41
42// File names are case-insensitive on windows only
43inline int os::file_name_strcmp(const char* s, const char* t) {
44  return _stricmp(s, t);
45}
46
47// Used to improve time-sharing on some systems
48inline void os::loop_breaker(int attempts) {}
49
50inline bool os::obsolete_option(const JavaVMOption *option) {
51  return false;
52}
53
54inline bool os::uses_stack_guard_pages() {
55  return os::win32::is_nt();
56}
57
58inline bool os::allocate_stack_guard_pages() {
59  assert(uses_stack_guard_pages(), "sanity check");
60  return true;
61}
62
63inline int os::readdir_buf_size(const char *path)
64{
65  /* As Windows doesn't use the directory entry buffer passed to
66     os::readdir() this can be as short as possible */
67
68  return 1;
69}
70
71// Bang the shadow pages if they need to be touched to be mapped.
72inline void os::bang_stack_shadow_pages() {
73  // Write to each page of our new frame to force OS mapping.
74  // If we decrement stack pointer more than one page
75  // the OS may not map an intervening page into our space
76  // and may fault on a memory access to interior of our frame.
77  address sp = current_stack_pointer();
78  for (int pages = 1; pages <= StackShadowPages; pages++) {
79    *((int *)(sp - (pages * vm_page_size()))) = 0;
80  }
81}
82
83inline bool os::numa_has_static_binding()   { return true;   }
84inline bool os::numa_has_group_homing()     { return false;  }
85
86#endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
87