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/*
* Copyright (c) 2002, 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_GSPACECOUNTERS_HPP
#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_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 GSpaceCounter is a holder class for performance counters
// that track a space;
class GSpaceCounters: 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.
// PerfConstant* _size;
Generation* _gen;
char* _name_space;
public:
GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g,
GenerationCounters* gc, bool sampled=true);
~GSpaceCounters() {
if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);
}
inline void update_capacity() {
_capacity->set_value(_gen->capacity());
}
inline void update_used() {
_used->set_value(_gen->used_stable());
}
// special version of update_used() to allow the used value to be
// passed as a parameter. This method can can be used in cases were
// the utilization is already known and/or when the _gen->used()
// method is known to be expensive and we want to avoid unnecessary
// calls to it.
//
inline void update_used(size_t used) {
_used->set_value(used);
}
inline void inc_used(size_t size) {
_used->inc(size);
}
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() {
update_used();
update_capacity();
}
const char* name_space() const { return _name_space; }
};
class GenerationUsedHelper : public PerfLongSampleHelper {
private:
Generation* _gen;
public:
GenerationUsedHelper(Generation* g) : _gen(g) { }
inline jlong take_sample() {
return _gen->used_stable();
}
};
#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
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