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comparison src/os/windows/vm/os_windows.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2006 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
27 class 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
38 public:
39 // Windows-specific interface:
40 static void initialize_system_info();
41 static void setmode_streams();
42
43 // Processor info as provided by NT
44 static int processor_type() { return _processor_type; }
45 // Processor level may not be accurate on non-NT systems
46 static int processor_level() {
47 assert(is_nt(), "use vm_version instead");
48 return _processor_level;
49 }
50 static julong available_memory();
51 static julong physical_memory() { return _physical_memory; }
52
53 public:
54 // Generic interface:
55
56 // Trace number of created threads
57 static intx _os_thread_limit;
58 static volatile intx _os_thread_count;
59
60 // Tells whether the platform is NT or Windown95
61 static bool is_nt() { return _is_nt; }
62
63 // Returns the byte size of a virtual memory page
64 static int vm_page_size() { return _vm_page_size; }
65
66 // Returns the size in bytes of memory blocks which can be allocated.
67 static int vm_allocation_granularity() { return _vm_allocation_granularity; }
68
69 // Read the headers for the executable that started the current process into
70 // the structure passed in (see winnt.h).
71 static void read_executable_headers(PIMAGE_NT_HEADERS);
72
73 // Default stack size for the current process.
74 static size_t default_stack_size() { return _default_stack_size; }
75
76 #ifndef _WIN64
77 // A wrapper to install a structured exception handler for fast JNI accesors.
78 static address fast_jni_accessor_wrapper(BasicType);
79 #endif
80
81 // filter function to ignore faults on serializations page
82 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
83 };
84
85 class PlatformEvent : public CHeapObj {
86 private:
87 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line
88 volatile int _Event ;
89 HANDLE _ParkHandle ;
90
91 public: // TODO-FIXME: make dtor private
92 ~PlatformEvent() { guarantee (0, "invariant") ; }
93
94 public:
95 PlatformEvent() {
96 _Event = 0 ;
97 _ParkHandle = CreateEvent (NULL, false, false, NULL) ;
98 guarantee (_ParkHandle != NULL, "invariant") ;
99 }
100
101 // Exercise caution using reset() and fired() - they may require MEMBARs
102 void reset() { _Event = 0 ; }
103 int fired() { return _Event; }
104 void park () ;
105 void unpark () ;
106 int park (jlong millis) ;
107 } ;
108
109
110
111 class PlatformParker : public CHeapObj {
112 protected:
113 HANDLE _ParkEvent ;
114
115 public:
116 ~PlatformParker () { guarantee (0, "invariant") ; }
117 PlatformParker () {
118 _ParkEvent = CreateEvent (NULL, true, false, NULL) ;
119 guarantee (_ParkEvent != NULL, "invariant") ;
120 }
121
122 } ;