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annotate src/os/windows/vm/os_windows.inline.hpp @ 6273:4c8f2a12e757 hs24-b20

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Merge
author twisti
date Fri, 10 Aug 2012 17:50:24 -0700
parents 828eafbd85cc
children cd3d6a6b95d9
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1 /*
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
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26 #define OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
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27
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28 #include "runtime/atomic.hpp"
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29 #include "runtime/os.hpp"
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30 #ifdef TARGET_OS_ARCH_windows_x86
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31 # include "atomic_windows_x86.inline.hpp"
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32 # include "orderAccess_windows_x86.inline.hpp"
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33 #endif
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34
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35 inline const char* os::file_separator() { return "\\"; }
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36 inline const char* os::line_separator() { return "\r\n"; }
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37 inline const char* os::path_separator() { return ";"; }
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38 inline const char* os::dll_file_extension() { return ".dll"; }
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39
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40 inline const char* os::jlong_format_specifier() { return "%I64d"; }
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41 inline const char* os::julong_format_specifier() { return "%I64u"; }
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42
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43 inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;}
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44
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45 // File names are case-insensitive on windows only
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46 inline int os::file_name_strcmp(const char* s, const char* t) {
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47 return _stricmp(s, t);
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48 }
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49
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50 inline void os::dll_unload(void *lib) {
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51 ::FreeLibrary((HMODULE)lib);
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52 }
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53
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54 inline void* os::dll_lookup(void *lib, const char *name) {
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55 return (void*)::GetProcAddress((HMODULE)lib, name);
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56 }
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57
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58 // Used to improve time-sharing on some systems
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59 inline void os::loop_breaker(int attempts) {}
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60
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61 inline bool os::obsolete_option(const JavaVMOption *option) {
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62 return false;
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63 }
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64
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65 inline bool os::uses_stack_guard_pages() {
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66 return os::win32::is_nt();
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67 }
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68
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69 inline bool os::allocate_stack_guard_pages() {
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70 assert(uses_stack_guard_pages(), "sanity check");
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71 return true;
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72 }
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73
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74 inline int os::readdir_buf_size(const char *path)
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75 {
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76 /* As Windows doesn't use the directory entry buffer passed to
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77 os::readdir() this can be as short as possible */
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78
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79 return 1;
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80 }
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81
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82 // Bang the shadow pages if they need to be touched to be mapped.
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83 inline void os::bang_stack_shadow_pages() {
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84 // Write to each page of our new frame to force OS mapping.
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85 // If we decrement stack pointer more than one page
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86 // the OS may not map an intervening page into our space
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87 // and may fault on a memory access to interior of our frame.
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88 address sp = current_stack_pointer();
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89 for (int pages = 1; pages <= StackShadowPages; pages++) {
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90 *((int *)(sp - (pages * vm_page_size()))) = 0;
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91 }
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92 }
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94 inline bool os::numa_has_static_binding() { return true; }
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95 inline bool os::numa_has_group_homing() { return false; }
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96
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97 inline size_t os::read(int fd, void *buf, unsigned int nBytes) {
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98 return ::read(fd, buf, nBytes);
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99 }
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100
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101 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
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102 return ::read(fd, buf, nBytes);
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103 }
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104
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105 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
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106 return ::write(fd, buf, nBytes);
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107 }
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108
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109 inline int os::close(int fd) {
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110 return ::close(fd);
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111 }
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112 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP