aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_UTILITIES_TICKS_HPP
aoqi@0: #define SHARE_VM_UTILITIES_TICKS_HPP
aoqi@0: 
aoqi@0: #include "memory/allocation.hpp"
aoqi@0: #include "utilities/globalDefinitions.hpp"
aoqi@0: 
aoqi@0: class Ticks;
aoqi@0: 
aoqi@0: class Tickspan VALUE_OBJ_CLASS_SPEC {
aoqi@0:   friend class Ticks;
aoqi@0:   friend Tickspan operator-(const Ticks& end, const Ticks& start);
aoqi@0: 
aoqi@0:  private:
aoqi@0:   jlong _span_ticks;
aoqi@0: 
aoqi@0:   Tickspan(const Ticks& end, const Ticks& start);
aoqi@0: 
aoqi@0:  public:
aoqi@0:   Tickspan() : _span_ticks(0) {}
aoqi@0: 
aoqi@0:   Tickspan& operator+=(const Tickspan& rhs) {
aoqi@0:     _span_ticks += rhs._span_ticks;
aoqi@0:     return *this;
aoqi@0:   }
aoqi@0: 
aoqi@0:   jlong value() const {
aoqi@0:     return _span_ticks;
aoqi@0:   }
aoqi@0: 
aoqi@0: };
aoqi@0: 
aoqi@0: class Ticks VALUE_OBJ_CLASS_SPEC {
aoqi@0:  private:
aoqi@0:   jlong _stamp_ticks;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   Ticks() : _stamp_ticks(0) {
aoqi@0:     assert((_stamp_ticks = invalid_time_stamp) == invalid_time_stamp,
aoqi@0:       "initial unstamped time value assignment");
aoqi@0:   }
aoqi@0: 
aoqi@0:   Ticks& operator+=(const Tickspan& span) {
aoqi@0:     _stamp_ticks += span.value();
aoqi@0:     return *this;
aoqi@0:   }
aoqi@0: 
aoqi@0:   Ticks& operator-=(const Tickspan& span) {
aoqi@0:     _stamp_ticks -= span.value();
aoqi@0:     return *this;
aoqi@0:   }
aoqi@0: 
aoqi@0:   void stamp();
aoqi@0: 
aoqi@0:   jlong value() const {
aoqi@0:     return _stamp_ticks;
aoqi@0:   }
aoqi@0: 
aoqi@0:   static const Ticks now();
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0:   static const jlong invalid_time_stamp;
aoqi@0: #endif
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   // only for internal use by GC VM tests
aoqi@0:   friend class TimePartitionPhasesIteratorTest;
aoqi@0:   friend class GCTimerTest;
aoqi@0: 
aoqi@0:  private:
aoqi@0:   // implicit type conversion
aoqi@0:   Ticks(int ticks) : _stamp_ticks(ticks) {}
aoqi@0: 
aoqi@0: #endif // !PRODUCT
aoqi@0: 
aoqi@0: };
aoqi@0: 
aoqi@0: class TicksToTimeHelper : public AllStatic {
aoqi@0:  public:
aoqi@0:   enum Unit {
aoqi@0:     SECONDS = 1,
aoqi@0:     MILLISECONDS = 1000
aoqi@0:   };
aoqi@0:   static double seconds(const Tickspan& span);
aoqi@0:   static jlong milliseconds(const Tickspan& span);
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_UTILITIES_TICKS_HPP