Sun, 21 Apr 2013 21:05:02 -0700
Merge
1 /*
2 * Copyright (c) 1997, 2013, 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 */
25 #ifndef OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
26 #define OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
28 #include "runtime/atomic.inline.hpp"
29 #include "runtime/os.hpp"
31 #ifdef TARGET_OS_ARCH_windows_x86
32 # include "orderAccess_windows_x86.inline.hpp"
33 #endif
35 inline const char* os::file_separator() { return "\\"; }
36 inline const char* os::line_separator() { return "\r\n"; }
37 inline const char* os::path_separator() { return ";"; }
38 inline const char* os::dll_file_extension() { return ".dll"; }
40 inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;}
42 // File names are case-insensitive on windows only
43 inline int os::file_name_strcmp(const char* s, const char* t) {
44 return _stricmp(s, t);
45 }
47 inline void os::dll_unload(void *lib) {
48 ::FreeLibrary((HMODULE)lib);
49 }
51 inline void* os::dll_lookup(void *lib, const char *name) {
52 return (void*)::GetProcAddress((HMODULE)lib, name);
53 }
55 // Used to improve time-sharing on some systems
56 inline void os::loop_breaker(int attempts) {}
58 inline bool os::obsolete_option(const JavaVMOption *option) {
59 return false;
60 }
62 inline bool os::uses_stack_guard_pages() {
63 return os::win32::is_nt();
64 }
66 inline bool os::allocate_stack_guard_pages() {
67 assert(uses_stack_guard_pages(), "sanity check");
68 return true;
69 }
71 inline int os::readdir_buf_size(const char *path)
72 {
73 /* As Windows doesn't use the directory entry buffer passed to
74 os::readdir() this can be as short as possible */
76 return 1;
77 }
79 // Bang the shadow pages if they need to be touched to be mapped.
80 inline void os::bang_stack_shadow_pages() {
81 // Write to each page of our new frame to force OS mapping.
82 // If we decrement stack pointer more than one page
83 // the OS may not map an intervening page into our space
84 // and may fault on a memory access to interior of our frame.
85 address sp = current_stack_pointer();
86 for (int pages = 1; pages <= StackShadowPages; pages++) {
87 *((int *)(sp - (pages * vm_page_size()))) = 0;
88 }
89 }
91 inline bool os::numa_has_static_binding() { return true; }
92 inline bool os::numa_has_group_homing() { return false; }
94 inline size_t os::read(int fd, void *buf, unsigned int nBytes) {
95 return ::read(fd, buf, nBytes);
96 }
98 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
99 return ::read(fd, buf, nBytes);
100 }
102 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
103 return ::write(fd, buf, nBytes);
104 }
106 inline int os::close(int fd) {
107 return ::close(fd);
108 }
109 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP