hotspot/src/os/windows/vm/os_windows.hpp
author stefank
Tue, 23 Nov 2010 13:22:55 -0800
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child 8119 81eef1b06988
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6989984: Use standard include model for Hospot Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
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/*
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 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef OS_WINDOWS_VM_OS_WINDOWS_HPP
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#define OS_WINDOWS_VM_OS_WINDOWS_HPP
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// Win32_OS defines the interface to windows operating systems
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class win32 {
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 protected:
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  static int    _vm_page_size;
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  static int    _vm_allocation_granularity;
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  static int    _processor_type;
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  static int    _processor_level;
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  static julong _physical_memory;
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  static size_t _default_stack_size;
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  static bool   _is_nt;
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  static bool   _is_windows_2003;
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 public:
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  // Windows-specific interface:
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  static void   initialize_system_info();
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  static void   setmode_streams();
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  // Processor info as provided by NT
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  static int processor_type()  { return _processor_type;  }
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  // Processor level may not be accurate on non-NT systems
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  static int processor_level() {
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    assert(is_nt(), "use vm_version instead");
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    return _processor_level;
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  }
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  static julong available_memory();
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  static julong physical_memory() { return _physical_memory; }
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 public:
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  // Generic interface:
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  // Trace number of created threads
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  static          intx  _os_thread_limit;
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  static volatile intx  _os_thread_count;
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  // Tells whether the platform is NT or Windown95
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  static bool is_nt() { return _is_nt; }
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  // Tells whether the platform is Windows 2003
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  static bool is_windows_2003() { return _is_windows_2003; }
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  // Returns the byte size of a virtual memory page
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  static int vm_page_size() { return _vm_page_size; }
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  // Returns the size in bytes of memory blocks which can be allocated.
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  static int vm_allocation_granularity() { return _vm_allocation_granularity; }
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  // Read the headers for the executable that started the current process into
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  // the structure passed in (see winnt.h).
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  static void read_executable_headers(PIMAGE_NT_HEADERS);
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  // Default stack size for the current process.
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  static size_t default_stack_size() { return _default_stack_size; }
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#ifndef _WIN64
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  // A wrapper to install a structured exception handler for fast JNI accesors.
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  static address fast_jni_accessor_wrapper(BasicType);
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#endif
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  // filter function to ignore faults on serializations page
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  static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
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};
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class PlatformEvent : public CHeapObj {
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  private:
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    double CachePad [4] ;   // increase odds that _Event is sole occupant of cache line
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    volatile int _Event ;
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    HANDLE _ParkHandle ;
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  public:       // TODO-FIXME: make dtor private
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    ~PlatformEvent() { guarantee (0, "invariant") ; }
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  public:
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    PlatformEvent() {
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      _Event   = 0 ;
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      _ParkHandle = CreateEvent (NULL, false, false, NULL) ;
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      guarantee (_ParkHandle != NULL, "invariant") ;
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    }
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    // Exercise caution using reset() and fired() - they may require MEMBARs
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    void reset() { _Event = 0 ; }
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    int  fired() { return _Event; }
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    void park () ;
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    void unpark () ;
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    int  park (jlong millis) ;
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} ;
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class PlatformParker : public CHeapObj {
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  protected:
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    HANDLE _ParkEvent ;
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  public:
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    ~PlatformParker () { guarantee (0, "invariant") ; }
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    PlatformParker  () {
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      _ParkEvent = CreateEvent (NULL, true, false, NULL) ;
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      guarantee (_ParkEvent != NULL, "invariant") ;
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    }
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} ;
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#endif // OS_WINDOWS_VM_OS_WINDOWS_HPP