1 /* 2 * Copyright (c) 1997, 2014, 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 30 inline const char* os::dll_file_extension() { return ".dll"; } 31 32 inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;} 33 34 // File names are case-insensitive on windows only 35 inline int os::file_name_strcmp(const char* s, const char* t) { 36 return _stricmp(s, t); 37 } 38 39 inline void os::dll_unload(void *lib) { 40 ::FreeLibrary((HMODULE)lib); 41 } 42 43 inline void* os::dll_lookup(void *lib, const char *name) { 44 return (void*)::GetProcAddress((HMODULE)lib, name); 45 } 46 47 inline bool os::obsolete_option(const JavaVMOption *option) { 48 return false; 49 } 50 51 inline bool os::uses_stack_guard_pages() { 52 return os::win32::is_nt(); 53 } 54 55 inline bool os::allocate_stack_guard_pages() { 56 assert(uses_stack_guard_pages(), "sanity check"); 57 return true; 58 } 59 60 inline int os::readdir_buf_size(const char *path) 61 { 62 /* As Windows doesn't use the directory entry buffer passed to 63 os::readdir() this can be as short as possible */ 64 65 return 1; 66 } 67 68 // Bang the shadow pages if they need to be touched to be mapped. 69 inline void os::bang_stack_shadow_pages() { 70 // Write to each page of our new frame to force OS mapping. 71 // If we decrement stack pointer more than one page 72 // the OS may not map an intervening page into our space 73 // and may fault on a memory access to interior of our frame. 74 address sp = current_stack_pointer(); 75 for (int pages = 1; pages <= StackShadowPages; pages++) { 76 *((int *)(sp - (pages * vm_page_size()))) = 0; 77 } 78 } 79 80 inline bool os::numa_has_static_binding() { return true; } 81 inline bool os::numa_has_group_homing() { return false; } 82 83 inline size_t os::read(int fd, void *buf, unsigned int nBytes) { 84 return ::read(fd, buf, nBytes); 85 } 86 87 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 88 return ::read(fd, buf, nBytes); 89 } 90 91 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 92 return ::write(fd, buf, nBytes); 93 } 94 95 inline int os::close(int fd) { 96 return ::close(fd); 97 } 98 99 inline bool os::supports_monotonic_clock() { 100 return win32::_has_performance_count; 101 } 102 103 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) \ 104 os::win32::call_test_func_with_wrapper(f) 105 106 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP