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/*
* Copyright (c) 2011, 2012, 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"
#if INCLUDE_ALL_GCS
#include "gc_implementation/shared/generationCounters.hpp"
#include "memory/generation.hpp"
#include "runtime/perfData.hpp"
#endif // INCLUDE_ALL_GCS
// 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
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