| /* |
| * Copyright (c) 2016, 2018, 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_JFR_RECORDER_STRINGPOOL_JFRSTRINGPOOL_HPP |
| #define SHARE_VM_JFR_RECORDER_STRINGPOOL_JFRSTRINGPOOL_HPP |
| |
| #include "jni.h" |
| #include "jfr/recorder/storage/jfrMemorySpace.hpp" |
| #include "jfr/recorder/storage/jfrMemorySpaceRetrieval.hpp" |
| #include "jfr/recorder/stringpool/jfrStringPoolBuffer.hpp" |
| |
| class JfrChunkWriter; |
| class JfrStringPool; |
| class Mutex; |
| |
| typedef JfrMemorySpace<JfrStringPoolBuffer, JfrMspaceSequentialRetrieval, JfrStringPool> JfrStringPoolMspace; |
| |
| // |
| // Although called JfrStringPool, a more succinct description would be |
| // "backing storage for the string pool located in Java" |
| // |
| // There are no lookups in native, only the encoding of string constants to the stream. |
| // |
| class JfrStringPool : public JfrCHeapObj { |
| public: |
| static bool add(bool epoch, jlong id, jstring string, JavaThread* jt); |
| size_t write(); |
| size_t write_at_safepoint(); |
| size_t clear(); |
| |
| typedef JfrStringPoolMspace::Type Buffer; |
| private: |
| JfrStringPoolMspace* _free_list_mspace; |
| Mutex* _lock; |
| JfrChunkWriter& _chunkwriter; |
| |
| // mspace callback |
| void register_full(Buffer* t, Thread* thread); |
| void lock(); |
| void unlock(); |
| DEBUG_ONLY(bool is_locked() const;) |
| |
| static Buffer* lease_buffer(Thread* thread, size_t size = 0); |
| static Buffer* flush(Buffer* old, size_t used, size_t requested, Thread* t); |
| |
| JfrStringPool(JfrChunkWriter& cw); |
| ~JfrStringPool(); |
| |
| static JfrStringPool& instance(); |
| static JfrStringPool* create(JfrChunkWriter& cw); |
| bool initialize(); |
| static void destroy(); |
| |
| friend class JfrRecorder; |
| friend class JfrRecorderService; |
| friend class JfrStringPoolFlush; |
| friend class JfrStringPoolWriter; |
| template <typename, template <typename> class, typename> |
| friend class JfrMemorySpace; |
| }; |
| |
| #endif // SHARE_VM_JFR_RECORDER_STRINGPOOL_JFRSTRINGPOOL_HPP |