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 */ 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/atomic.inline.hpp" 30 #include "runtime/os.hpp" 31 32 #ifdef TARGET_OS_ARCH_windows_x86 33 # include "orderAccess_windows_x86.inline.hpp" 34 #endif 35 36 inline const char* os::file_separator() { return "\\"; } 37 inline const char* os::line_separator() { return "\r\n"; } 38 inline const char* os::path_separator() { return ";"; } 39 inline const char* os::dll_file_extension() { return ".dll"; } 40 41 inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;} 42 43 // File names are case-insensitive on windows only 44 inline int os::file_name_strcmp(const char* s, const char* t) { 45 return _stricmp(s, t); 46 } 47 48 inline void os::dll_unload(void *lib) { 49 ::FreeLibrary((HMODULE)lib); 50 } 51 52 inline void* os::dll_lookup(void *lib, const char *name) { 53 return (void*)::GetProcAddress((HMODULE)lib, name); 54 } 55 56 // Used to improve time-sharing on some systems 57 inline void os::loop_breaker(int attempts) {} 58 59 inline bool os::obsolete_option(const JavaVMOption *option) { 60 return false; 61 } 62 63 inline bool os::uses_stack_guard_pages() { 64 return os::win32::is_nt(); 65 } 66 67 inline bool os::allocate_stack_guard_pages() { 68 assert(uses_stack_guard_pages(), "sanity check"); 69 return true; 70 } 71 72 inline int os::readdir_buf_size(const char *path) 73 { 74 /* As Windows doesn't use the directory entry buffer passed to 75 os::readdir() this can be as short as possible */ 76 77 return 1; 78 } 79 80 // Bang the shadow pages if they need to be touched to be mapped. 81 inline void os::bang_stack_shadow_pages() { 82 // Write to each page of our new frame to force OS mapping. 83 // If we decrement stack pointer more than one page 84 // the OS may not map an intervening page into our space 85 // and may fault on a memory access to interior of our frame. 86 address sp = current_stack_pointer(); 87 for (int pages = 1; pages <= StackShadowPages; pages++) { 88 *((int *)(sp - (pages * vm_page_size()))) = 0; 89 } 90 } 91 92 inline bool os::numa_has_static_binding() { return true; } 93 inline bool os::numa_has_group_homing() { return false; } 94 95 inline size_t os::read(int fd, void *buf, unsigned int nBytes) { 96 return ::read(fd, buf, nBytes); 97 } 98 99 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 100 return ::read(fd, buf, nBytes); 101 } 102 103 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 104 return ::write(fd, buf, nBytes); 105 } 106 107 inline int os::close(int fd) { 108 return ::close(fd); 109 } 110 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP