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/*
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* Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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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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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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// 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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