author | jcoomes |
Fri, 08 Oct 2010 09:29:09 -0700 | |
changeset 6769 | 5f30b5a1ce5c |
parent 5547 | f4b087cbb361 |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2002, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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class StatSamplerTask; |
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/* |
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* The StatSampler class is responsible for periodically updating |
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* sampled PerfData instances and writing the sampled values to the |
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* PerfData memory region. |
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* |
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* In addition it is also responsible for providing a home for |
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* PerfData instances that otherwise have no better home. |
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*/ |
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class StatSampler : AllStatic { |
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friend class StatSamplerTask; |
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private: |
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static StatSamplerTask* _task; |
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static PerfDataList* _sampled; |
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static void collect_sample(); |
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static void create_misc_perfdata(); |
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static void create_sampled_perfdata(); |
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static void sample_data(PerfDataList* list); |
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static const char* get_system_property(const char* name, TRAPS); |
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static void create_system_property_instrumentation(TRAPS); |
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public: |
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// Start/stop the sampler |
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static void engage(); |
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static void disengage(); |
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static bool is_active() { return _task != NULL; } |
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static void initialize(); |
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static void destroy(); |
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}; |
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void statSampler_exit(); |