os_windows.hpp revision 470:ad8c8ca4ab0f 
1/*
2 * Copyright 1997-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25// Win32_OS defines the interface to windows operating systems
26
27class win32 {
28
29 protected:
30  static int    _vm_page_size;
31  static int    _vm_allocation_granularity;
32  static int    _processor_type;
33  static int    _processor_level;
34  static julong _physical_memory;
35  static size_t _default_stack_size;
36  static bool   _is_nt;
37  static bool   _is_windows_2003;
38
39 public:
40  // Windows-specific interface:
41  static void   initialize_system_info();
42  static void   setmode_streams();
43
44  // Processor info as provided by NT
45  static int processor_type()  { return _processor_type;  }
46  // Processor level may not be accurate on non-NT systems
47  static int processor_level() {
48    assert(is_nt(), "use vm_version instead");
49    return _processor_level;
50  }
51  static julong available_memory();
52  static julong physical_memory() { return _physical_memory; }
53
54 public:
55  // Generic interface:
56
57  // Trace number of created threads
58  static          intx  _os_thread_limit;
59  static volatile intx  _os_thread_count;
60
61  // Tells whether the platform is NT or Windown95
62  static bool is_nt() { return _is_nt; }
63
64  // Tells whether the platform is Windows 2003
65  static bool is_windows_2003() { return _is_windows_2003; }
66
67  // Returns the byte size of a virtual memory page
68  static int vm_page_size() { return _vm_page_size; }
69
70  // Returns the size in bytes of memory blocks which can be allocated.
71  static int vm_allocation_granularity() { return _vm_allocation_granularity; }
72
73  // Read the headers for the executable that started the current process into
74  // the structure passed in (see winnt.h).
75  static void read_executable_headers(PIMAGE_NT_HEADERS);
76
77  // Default stack size for the current process.
78  static size_t default_stack_size() { return _default_stack_size; }
79
80#ifndef _WIN64
81  // A wrapper to install a structured exception handler for fast JNI accesors.
82  static address fast_jni_accessor_wrapper(BasicType);
83#endif
84
85  // filter function to ignore faults on serializations page
86  static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
87};
88
89class PlatformEvent : public CHeapObj {
90  private:
91    double CachePad [4] ;   // increase odds that _Event is sole occupant of cache line
92    volatile int _Event ;
93    HANDLE _ParkHandle ;
94
95  public:       // TODO-FIXME: make dtor private
96    ~PlatformEvent() { guarantee (0, "invariant") ; }
97
98  public:
99    PlatformEvent() {
100      _Event   = 0 ;
101      _ParkHandle = CreateEvent (NULL, false, false, NULL) ;
102      guarantee (_ParkHandle != NULL, "invariant") ;
103    }
104
105    // Exercise caution using reset() and fired() - they may require MEMBARs
106    void reset() { _Event = 0 ; }
107    int  fired() { return _Event; }
108    void park () ;
109    void unpark () ;
110    int  park (jlong millis) ;
111} ;
112
113
114
115class PlatformParker : public CHeapObj {
116  protected:
117    HANDLE _ParkEvent ;
118
119  public:
120    ~PlatformParker () { guarantee (0, "invariant") ; }
121    PlatformParker  () {
122      _ParkEvent = CreateEvent (NULL, true, false, NULL) ;
123      guarantee (_ParkEvent != NULL, "invariant") ;
124    }
125
126} ;
127