Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/shared/hSpaceCounters.hpp @ 12305:a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
Summary: Add G1BiasedArray<T> that is an array where each element represents a fixed-sized subdivision of the heap. Use this abstraction to refactor the HeapRegionSeq class.
Reviewed-by: brutisso
author | tschatzl |
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date | Wed, 25 Sep 2013 13:25:24 +0200 |
parents | de88570fabfc |
children |
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/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP #define SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP #include "utilities/macros.hpp" #include "gc_implementation/shared/generationCounters.hpp" #include "memory/generation.hpp" #include "runtime/perfData.hpp" // A HSpaceCounter is a holder class for performance counters // that track a collections (logical spaces) in a heap; class HeapSpaceUsedHelper; class G1SpaceMonitoringSupport; class HSpaceCounters: public CHeapObj<mtGC> { friend class VMStructs; private: PerfVariable* _capacity; PerfVariable* _used; // Constant PerfData types don't need to retain a reference. // However, it's a good idea to document them here. char* _name_space; public: HSpaceCounters(const char* name, int ordinal, size_t max_size, size_t initial_capacity, GenerationCounters* gc); ~HSpaceCounters() { if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC); } inline void update_capacity(size_t v) { _capacity->set_value(v); } inline void update_used(size_t v) { _used->set_value(v); } debug_only( // for security reasons, we do not allow arbitrary reads from // the counters as they may live in shared memory. jlong used() { return _used->get_value(); } jlong capacity() { return _used->get_value(); } ) inline void update_all(size_t capacity, size_t used) { update_capacity(capacity); update_used(used); } const char* name_space() const { return _name_space; } }; #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP