duke@435: /*
stefank@2314:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_RUNTIME_VM_VERSION_HPP
stefank@2314: #define SHARE_VM_RUNTIME_VM_VERSION_HPP
stefank@2314: 
stefank@2314: #include "memory/allocation.hpp"
stefank@2314: #include "utilities/ostream.hpp"
stefank@2314: 
duke@435: // VM_Version provides information about the VM.
duke@435: 
duke@435: class Abstract_VM_Version: AllStatic {
duke@435:  protected:
duke@435:   friend class VMStructs;
duke@435:   static const char*  _s_vm_release;
duke@435:   static const char*  _s_internal_vm_info_string;
duke@435:   // These are set by machine-dependent initializations
duke@435:   static bool         _supports_cx8;
duke@435:   static unsigned int _logical_processors_per_package;
duke@435:   static int          _vm_major_version;
duke@435:   static int          _vm_minor_version;
duke@435:   static int          _vm_build_number;
duke@435:   static bool         _initialized;
jmasa@445:   static int          _parallel_worker_threads;
jmasa@445:   static bool         _parallel_worker_threads_initialized;
jmasa@445: 
jmasa@445:   static unsigned int nof_parallel_worker_threads(unsigned int num,
jmasa@445:                                                   unsigned int dem,
jmasa@445:                                                   unsigned int switch_pt);
duke@435:  public:
duke@435:   static void initialize();
duke@435: 
duke@435:   // Name
duke@435:   static const char* vm_name();
duke@435:   // Vendor
duke@435:   static const char* vm_vendor();
duke@435:   // VM version information string printed by launcher (java -version)
duke@435:   static const char* vm_info_string();
duke@435:   static const char* vm_release();
duke@435:   static const char* vm_platform_string();
kamg@2515:   static const char* vm_build_user();
duke@435: 
duke@435:   static int vm_major_version()               { assert(_initialized, "not initialized"); return _vm_major_version; }
duke@435:   static int vm_minor_version()               { assert(_initialized, "not initialized"); return _vm_minor_version; }
duke@435:   static int vm_build_number()                { assert(_initialized, "not initialized"); return _vm_build_number; }
duke@435: 
duke@435:   // Gets the jvm_version_info.jvm_version defined in jvm.h
duke@435:   static unsigned int jvm_version();
duke@435: 
duke@435:   // Internal version providing additional build information
duke@435:   static const char* internal_vm_info_string();
duke@435: 
duke@435:   // does HW support an 8-byte compare-exchange operation?
duke@435:   static bool supports_cx8()  {return _supports_cx8;}
duke@435:   static unsigned int logical_processors_per_package() {
duke@435:     return _logical_processors_per_package;
duke@435:   }
duke@435: 
bobv@2036:   // ARCH specific policy for the BiasedLocking
bobv@2036:   static bool use_biased_locking()  { return true; }
bobv@2036: 
duke@435:   // Number of page sizes efficiently supported by the hardware.  Most chips now
duke@435:   // support two sizes, thus this default implementation.  Processor-specific
duke@435:   // subclasses should define new versions to hide this one as needed.  Note
duke@435:   // that the O/S may support more sizes, but at most this many are used.
duke@435:   static uint page_size_count() { return 2; }
jmasa@445: 
jmasa@445:   // Returns the number of parallel threads to be used for VM
jmasa@445:   // work.  If that number has not been calculated, do so and
jmasa@445:   // save it.  Returns ParallelGCThreads if it is set on the
jmasa@445:   // command line.
jmasa@445:   static unsigned int parallel_worker_threads();
jmasa@445:   // Calculates and returns the number of parallel threads.  May
jmasa@445:   // be VM version specific.
jmasa@445:   static unsigned int calc_parallel_worker_threads();
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_RUNTIME_VM_VERSION_HPP