--- /dev/null	2019-01-28 17:47:53.000000000 +0800
+++ new/src/share/vm/jfr/recorder/storage/jfrStorage.hpp	2019-01-28 17:47:53.000000000 +0800
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2012, 2019, 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_STORAGE_JFRSTORAGE_HPP
+#define SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP
+
+#include "jfr/recorder/storage/jfrBuffer.hpp"
+#include "jfr/recorder/storage/jfrMemorySpace.hpp"
+#include "jfr/recorder/storage/jfrMemorySpaceRetrieval.hpp"
+
+class JfrChunkWriter;
+class JfrPostBox;
+class JfrStorage;
+class JfrStorageControl;
+
+typedef JfrMemorySpace<JfrBuffer, JfrMspaceAlternatingRetrieval, JfrStorage> JfrStorageMspace;
+typedef JfrMemorySpace<JfrAgeNode, JfrMspaceSequentialRetrieval, JfrStorage> JfrStorageAgeMspace;
+
+//
+// Responsible for providing backing storage for writing events.
+//
+class JfrStorage : public JfrCHeapObj {
+ public:
+  typedef JfrStorageMspace::Type Buffer;
+ private:
+  JfrStorageControl* _control;
+  JfrStorageMspace* _global_mspace;
+  JfrStorageMspace* _thread_local_mspace;
+  JfrStorageMspace* _transient_mspace;
+  JfrStorageAgeMspace* _age_mspace;
+  JfrChunkWriter& _chunkwriter;
+  JfrPostBox& _post_box;
+
+  // mspace callbacks
+  void register_full(Buffer* t, Thread* thread);
+  void lock();
+  void unlock();
+
+  Buffer* acquire_large(size_t size, Thread* t);
+  Buffer* acquire_transient(size_t size, Thread* thread);
+  bool flush_regular_buffer(Buffer* const buffer, Thread* t);
+  Buffer* flush_regular(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
+  Buffer* flush_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
+  Buffer* provision_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
+  void release(Buffer* buffer, Thread* t);
+
+  size_t clear();
+  size_t clear_full();
+  size_t write();
+  size_t write_full();
+  size_t write_at_safepoint();
+  size_t scavenge();
+
+  JfrStorage(JfrChunkWriter& cw, JfrPostBox& post_box);
+  ~JfrStorage();
+
+  static JfrStorage& instance();
+  static JfrStorage* create(JfrChunkWriter& chunkwriter, JfrPostBox& post_box);
+  bool initialize();
+  static void destroy();
+
+ public:
+  static Buffer* acquire_thread_local(Thread* t, size_t size = 0);
+  static void release_thread_local(Buffer* buffer, Thread* t);
+  void release_large(Buffer* const buffer, Thread* t);
+  static Buffer* flush(Buffer* cur, size_t used, size_t req, bool native, Thread* t);
+  void discard_oldest(Thread* t);
+  static JfrStorageControl& control();
+
+  friend class JfrRecorder;
+  friend class JfrRecorderService;
+  template <typename, template <typename> class, typename>
+  friend class JfrMemorySpace;
+};
+
+#endif // SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP