duke@435: /*
duke@435:  * Copyright 2002-2004 Sun Microsystems, Inc.  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:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // A GSpaceCounter is a holder class for performance counters
duke@435: // that track a space;
duke@435: 
duke@435: class GSpaceCounters: public CHeapObj {
duke@435:   friend class VMStructs;
duke@435: 
duke@435:  private:
duke@435:   PerfVariable*      _capacity;
duke@435:   PerfVariable*      _used;
duke@435: 
duke@435:   // Constant PerfData types don't need to retain a reference.
duke@435:   // However, it's a good idea to document them here.
duke@435:   // PerfConstant*     _size;
duke@435: 
duke@435:   Generation*       _gen;
duke@435:   char*             _name_space;
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g,
duke@435:                  GenerationCounters* gc, bool sampled=true);
duke@435: 
duke@435:   ~GSpaceCounters() {
duke@435:     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
duke@435:   }
duke@435: 
duke@435:   inline void update_capacity() {
duke@435:     _capacity->set_value(_gen->capacity());
duke@435:   }
duke@435: 
duke@435:   inline void update_used() {
duke@435:     _used->set_value(_gen->used());
duke@435:   }
duke@435: 
duke@435:   // special version of update_used() to allow the used value to be
duke@435:   // passed as a parameter. This method can can be used in cases were
duke@435:   // the  utilization is already known and/or when the _gen->used()
duke@435:   // method is known to be expensive and we want to avoid unnecessary
duke@435:   // calls to it.
duke@435:   //
duke@435:   inline void update_used(size_t used) {
duke@435:     _used->set_value(used);
duke@435:   }
duke@435: 
duke@435:   inline void inc_used(size_t size) {
duke@435:     _used->inc(size);
duke@435:   }
duke@435: 
duke@435:   debug_only(
duke@435:     // for security reasons, we do not allow arbitrary reads from
duke@435:     // the counters as they may live in shared memory.
duke@435:     jlong used() {
duke@435:       return _used->get_value();
duke@435:     }
duke@435:     jlong capacity() {
duke@435:       return _used->get_value();
duke@435:     }
duke@435:   )
duke@435: 
duke@435:   inline void update_all() {
duke@435:     update_used();
duke@435:     update_capacity();
duke@435:   }
duke@435: 
duke@435:   const char* name_space() const        { return _name_space; }
duke@435: };
duke@435: 
duke@435: class GenerationUsedHelper : public PerfLongSampleHelper {
duke@435:   private:
duke@435:     Generation* _gen;
duke@435: 
duke@435:   public:
duke@435:     GenerationUsedHelper(Generation* g) : _gen(g) { }
duke@435: 
duke@435:     inline jlong take_sample() {
duke@435:       return _gen->used();
duke@435:     }
duke@435: };