1 /* 2 * Copyright (c) 1997, 2010, 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_HPP 26 #define OS_WINDOWS_VM_OS_WINDOWS_HPP 27 28 // Win32_OS defines the interface to windows operating systems 29 30 class win32 { 31 32 protected: 33 static int _vm_page_size; 34 static int _vm_allocation_granularity; 35 static int _processor_type; 36 static int _processor_level; 37 static julong _physical_memory; 38 static size_t _default_stack_size; 39 static bool _is_nt; 40 static bool _is_windows_2003; 41 42 public: 43 // Windows-specific interface: 44 static void initialize_system_info(); 45 static void setmode_streams(); 46 47 // Processor info as provided by NT 48 static int processor_type() { return _processor_type; } 49 // Processor level may not be accurate on non-NT systems 50 static int processor_level() { 51 assert(is_nt(), "use vm_version instead"); 52 return _processor_level; 53 } 54 static julong available_memory(); 55 static julong physical_memory() { return _physical_memory; } 56 57 public: 58 // Generic interface: 59 60 // Trace number of created threads 61 static intx _os_thread_limit; 62 static volatile intx _os_thread_count; 63 64 // Tells whether the platform is NT or Windown95 65 static bool is_nt() { return _is_nt; } 66 67 // Tells whether the platform is Windows 2003 68 static bool is_windows_2003() { return _is_windows_2003; } 69 70 // Returns the byte size of a virtual memory page 71 static int vm_page_size() { return _vm_page_size; } 72 73 // Returns the size in bytes of memory blocks which can be allocated. 74 static int vm_allocation_granularity() { return _vm_allocation_granularity; } 75 76 // Read the headers for the executable that started the current process into 77 // the structure passed in (see winnt.h). 78 static void read_executable_headers(PIMAGE_NT_HEADERS); 79 80 // Default stack size for the current process. 81 static size_t default_stack_size() { return _default_stack_size; } 82 83 #ifndef _WIN64 84 // A wrapper to install a structured exception handler for fast JNI accesors. 85 static address fast_jni_accessor_wrapper(BasicType); 86 #endif 87 88 // filter function to ignore faults on serializations page 89 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e); 90 }; 91 92 class PlatformEvent : public CHeapObj { 93 private: 94 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line 95 volatile int _Event ; 96 HANDLE _ParkHandle ; 97 98 public: // TODO-FIXME: make dtor private 99 ~PlatformEvent() { guarantee (0, "invariant") ; } 100 101 public: 102 PlatformEvent() { 103 _Event = 0 ; 104 _ParkHandle = CreateEvent (NULL, false, false, NULL) ; 105 guarantee (_ParkHandle != NULL, "invariant") ; 106 } 107 108 // Exercise caution using reset() and fired() - they may require MEMBARs 109 void reset() { _Event = 0 ; } 110 int fired() { return _Event; } 111 void park () ; 112 void unpark () ; 113 int park (jlong millis) ; 114 } ; 115 116 117 118 class PlatformParker : public CHeapObj { 119 protected: 120 HANDLE _ParkEvent ; 121 122 public: 123 ~PlatformParker () { guarantee (0, "invariant") ; } 124 PlatformParker () { 125 _ParkEvent = CreateEvent (NULL, true, false, NULL) ; 126 guarantee (_ParkEvent != NULL, "invariant") ; 127 } 128 129 } ; 130 131 #endif // OS_WINDOWS_VM_OS_WINDOWS_HPP