apetushkov@9858: /*
apetushkov@9858:  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
apetushkov@9858:  *
apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #ifndef SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
apetushkov@9858: #define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
apetushkov@9858: 
apetushkov@9858: #include "jfr/recorder/storage/jfrBuffer.hpp"
apetushkov@9858: #include "jfr/utilities/jfrTypes.hpp"
apetushkov@9858: #include "memory/allocation.hpp"
apetushkov@9858: 
apetushkov@9858: class Thread;
apetushkov@9858: 
apetushkov@9858: class JfrFlush : public StackObj {
apetushkov@9858:  public:
apetushkov@9858:   typedef JfrBuffer Type;
apetushkov@9858:   JfrFlush(Type* old, size_t used, size_t requested, Thread* t);
apetushkov@9858:   Type* result() const { return _result; }
apetushkov@9858:  private:
apetushkov@9858:   Type* _result;
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t);
apetushkov@9858: bool jfr_is_event_enabled(JfrEventId id);
apetushkov@9858: bool jfr_has_stacktrace_enabled(JfrEventId id);
apetushkov@9858: bool jfr_save_stacktrace(Thread* t);
apetushkov@9858: void jfr_clear_stacktrace(Thread* t);
apetushkov@9858: 
apetushkov@9858: template <typename Event>
apetushkov@9858: class JfrConditionalFlush {
apetushkov@9858:  public:
apetushkov@9858:   typedef JfrBuffer Type;
apetushkov@9858:   JfrConditionalFlush(Thread* t) {
apetushkov@9858:     if (jfr_is_event_enabled(Event::eventId)) {
apetushkov@9858:       jfr_conditional_flush(Event::eventId, sizeof(Event), t);
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: template <typename Event>
apetushkov@9858: class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
apetushkov@9858:   Thread* _t;
apetushkov@9858:   bool _owner;
apetushkov@9858:  public:
apetushkov@9858:   JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
apetushkov@9858:     if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
apetushkov@9858:       _owner = jfr_save_stacktrace(t);
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858:   ~JfrConditionalFlushWithStacktrace() {
apetushkov@9858:     if (_owner) {
apetushkov@9858:       jfr_clear_stacktrace(_t);
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: #endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP