1 /*
2 * Copyright (c) 1997, 2018, 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/os.hpp"
29 #include "runtime/thread.hpp"
30
dll_file_extension()31 inline const char* os::dll_file_extension() { return ".dll"; }
32
default_file_open_flags()33 inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;}
34
35 // File names are case-insensitive on windows only
file_name_strncmp(const char * s,const char * t,size_t num)36 inline int os::file_name_strncmp(const char* s, const char* t, size_t num) {
37 return _strnicmp(s, t, num);
38 }
39
dll_unload(void * lib)40 inline void os::dll_unload(void *lib) {
41 ::FreeLibrary((HMODULE)lib);
42 }
43
dll_lookup(void * lib,const char * name)44 inline void* os::dll_lookup(void *lib, const char *name) {
45 return (void*)::GetProcAddress((HMODULE)lib, name);
46 }
47
uses_stack_guard_pages()48 inline bool os::uses_stack_guard_pages() {
49 return true;
50 }
51
must_commit_stack_guard_pages()52 inline bool os::must_commit_stack_guard_pages() {
53 return true;
54 }
55
56 // Bang the shadow pages if they need to be touched to be mapped.
map_stack_shadow_pages(address sp)57 inline void os::map_stack_shadow_pages(address sp) {
58 // Write to each page of our new frame to force OS mapping.
59 // If we decrement stack pointer more than one page
60 // the OS may not map an intervening page into our space
61 // and may fault on a memory access to interior of our frame.
62 const int page_size = os::win32::vm_page_size();
63 const size_t n_pages = JavaThread::stack_shadow_zone_size() / page_size;
64 for (size_t pages = 1; pages <= n_pages; pages++) {
65 sp -= page_size;
66 *sp = 0;
67 }
68 }
69
numa_has_static_binding()70 inline bool os::numa_has_static_binding() { return true; }
numa_has_group_homing()71 inline bool os::numa_has_group_homing() { return false; }
72
read(int fd,void * buf,unsigned int nBytes)73 inline size_t os::read(int fd, void *buf, unsigned int nBytes) {
74 return ::read(fd, buf, nBytes);
75 }
76
restartable_read(int fd,void * buf,unsigned int nBytes)77 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
78 return ::read(fd, buf, nBytes);
79 }
80
write(int fd,const void * buf,unsigned int nBytes)81 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
82 return ::write(fd, buf, nBytes);
83 }
84
close(int fd)85 inline int os::close(int fd) {
86 return ::close(fd);
87 }
88
supports_monotonic_clock()89 inline bool os::supports_monotonic_clock() {
90 return true;
91 }
92
exit(int num)93 inline void os::exit(int num) {
94 win32::exit_process_or_thread(win32::EPT_PROCESS, num);
95 }
96
97 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
98