1 /* 2 * Copyright (c) 1997, 2019, 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_OS_WINDOWS_INLINE_HPP 26 #define OS_WINDOWS_OS_WINDOWS_INLINE_HPP 27 28 #include "runtime/os.hpp" 29 #include "runtime/thread.hpp" 30 31 inline const char* os::dll_file_extension() { return ".dll"; } 32 33 inline void os::dll_unload(void *lib) { 34 ::FreeLibrary((HMODULE)lib); 35 } 36 37 inline void* os::dll_lookup(void *lib, const char *name) { 38 return (void*)::GetProcAddress((HMODULE)lib, name); 39 } 40 41 inline bool os::uses_stack_guard_pages() { 42 return true; 43 } 44 45 inline bool os::must_commit_stack_guard_pages() { 46 return true; 47 } 48 49 // Bang the shadow pages if they need to be touched to be mapped. 50 inline void os::map_stack_shadow_pages(address sp) { 51 // Write to each page of our new frame to force OS mapping. 52 // If we decrement stack pointer more than one page 53 // the OS may not map an intervening page into our space 54 // and may fault on a memory access to interior of our frame. 55 const int page_size = os::win32::vm_page_size(); 56 const size_t n_pages = JavaThread::stack_shadow_zone_size() / page_size; 57 for (size_t pages = 1; pages <= n_pages; pages++) { 58 sp -= page_size; 59 *sp = 0; 60 } 61 } 62 63 inline bool os::numa_has_static_binding() { return true; } 64 inline bool os::numa_has_group_homing() { return false; } 65 66 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 67 return ::write(fd, buf, nBytes); 68 } 69 70 inline int os::close(int fd) { 71 return ::close(fd); 72 } 73 74 inline bool os::supports_monotonic_clock() { 75 return true; 76 } 77 78 inline void os::exit(int num) { 79 win32::exit_process_or_thread(win32::EPT_PROCESS, num); 80 } 81 82 // Platform Mutex/Monitor implementation 83 84 inline os::PlatformMutex::PlatformMutex() { 85 InitializeCriticalSection(&_mutex); 86 } 87 88 inline os::PlatformMutex::~PlatformMutex() { 89 DeleteCriticalSection(&_mutex); 90 } 91 92 inline os::PlatformMonitor::PlatformMonitor() { 93 InitializeConditionVariable(&_cond); 94 } 95 96 inline os::PlatformMonitor::~PlatformMonitor() { 97 // There is no DeleteConditionVariable API 98 } 99 100 inline void os::PlatformMutex::lock() { 101 EnterCriticalSection(&_mutex); 102 } 103 104 inline void os::PlatformMutex::unlock() { 105 LeaveCriticalSection(&_mutex); 106 } 107 108 inline bool os::PlatformMutex::try_lock() { 109 return TryEnterCriticalSection(&_mutex); 110 } 111 112 inline void os::PlatformMonitor::notify() { 113 WakeConditionVariable(&_cond); 114 } 115 116 inline void os::PlatformMonitor::notify_all() { 117 WakeAllConditionVariable(&_cond); 118 } 119 120 #endif // OS_WINDOWS_OS_WINDOWS_INLINE_HPP