c96a95c4b8
Update copyright year for files that have been modified in 2008 Reviewed-by: ohair, tbell
88 lines
3.7 KiB
C++
88 lines
3.7 KiB
C++
/*
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* Copyright 1997-2008 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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// VM_Version provides information about the VM.
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class Abstract_VM_Version: AllStatic {
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protected:
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friend class VMStructs;
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static const char* _s_vm_release;
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static const char* _s_internal_vm_info_string;
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// These are set by machine-dependent initializations
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static bool _supports_cx8;
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static unsigned int _logical_processors_per_package;
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static int _vm_major_version;
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static int _vm_minor_version;
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static int _vm_build_number;
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static bool _initialized;
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static int _parallel_worker_threads;
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static bool _parallel_worker_threads_initialized;
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static unsigned int nof_parallel_worker_threads(unsigned int num,
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unsigned int dem,
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unsigned int switch_pt);
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public:
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static void initialize();
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// Name
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static const char* vm_name();
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// Vendor
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static const char* vm_vendor();
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// VM version information string printed by launcher (java -version)
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static const char* vm_info_string();
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static const char* vm_release();
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static const char* vm_platform_string();
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static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; }
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static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; }
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static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; }
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// Gets the jvm_version_info.jvm_version defined in jvm.h
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static unsigned int jvm_version();
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// Internal version providing additional build information
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static const char* internal_vm_info_string();
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// does HW support an 8-byte compare-exchange operation?
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static bool supports_cx8() {return _supports_cx8;}
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static unsigned int logical_processors_per_package() {
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return _logical_processors_per_package;
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}
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// Number of page sizes efficiently supported by the hardware. Most chips now
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// support two sizes, thus this default implementation. Processor-specific
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// subclasses should define new versions to hide this one as needed. Note
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// that the O/S may support more sizes, but at most this many are used.
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static uint page_size_count() { return 2; }
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// Returns the number of parallel threads to be used for VM
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// work. If that number has not been calculated, do so and
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// save it. Returns ParallelGCThreads if it is set on the
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// command line.
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static unsigned int parallel_worker_threads();
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// Calculates and returns the number of parallel threads. May
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// be VM version specific.
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static unsigned int calc_parallel_worker_threads();
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};
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