/*

 * 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_JFR_SUPPORT_JFRTHREADLOCAL_HPP

#define SHARE_JFR_SUPPORT_JFRTHREADLOCAL_HPP

#include "jfr/utilities/jfrTypes.hpp"

class JavaThread;

class JfrBuffer;

class JfrStackFrame;

class Thread;

class JfrThreadLocal {

 private:

  jobject _java_event_writer;

  mutable JfrBuffer* _java_buffer;

  mutable JfrBuffer* _native_buffer;

  JfrBuffer* _shelved_buffer;

  mutable JfrStackFrame* _stackframes;

  mutable traceid _trace_id;

  u8 _data_lost;

  traceid _stack_trace_id;

  jlong _user_time;

  jlong _cpu_time;

  jlong _wallclock_time;

  unsigned int _stack_trace_hash;

  mutable u4 _stackdepth;

  volatile jint _entering_suspend_flag;

  bool _dead;

  JfrBuffer* install_native_buffer() const;

  JfrBuffer* install_java_buffer() const;

  JfrStackFrame* install_stackframes() const;

  static void release(JfrThreadLocal* tl, Thread* t);

 public:

  JfrThreadLocal();

  JfrBuffer* native_buffer() const {

    return _native_buffer != NULL ? _native_buffer : install_native_buffer();

  }

  bool has_native_buffer() const {

    return _native_buffer != NULL;

  }

  void set_native_buffer(JfrBuffer* buffer) {

    _native_buffer = buffer;

  }

  JfrBuffer* java_buffer() const {

    return _java_buffer != NULL ? _java_buffer : install_java_buffer();

  }

  bool has_java_buffer() const {

    return _java_buffer != NULL;

  }

  void set_java_buffer(JfrBuffer* buffer) {

    _java_buffer = buffer;

  }

  JfrBuffer* shelved_buffer() const {

    return _shelved_buffer;

  }

  void shelve_buffer(JfrBuffer* buffer) {

    _shelved_buffer = buffer;

  }

  bool has_java_event_writer() const {

    return _java_event_writer != NULL;

  }

  jobject java_event_writer() {

    return _java_event_writer;

  }

  void set_java_event_writer(jobject java_event_writer) {

    _java_event_writer = java_event_writer;

  }

  JfrStackFrame* stackframes() const {

    return _stackframes != NULL ? _stackframes : install_stackframes();

  }

  void set_stackframes(JfrStackFrame* frames) {

    _stackframes = frames;

  }

  u4 stackdepth() const;

  void set_stackdepth(u4 depth) {

    _stackdepth = depth;

  }

  traceid thread_id() const {

    return _trace_id;

  }

  void set_thread_id(traceid thread_id) {

    _trace_id = thread_id;

  }

  void set_cached_stack_trace_id(traceid id, unsigned int hash = 0) {

    _stack_trace_id = id;

    _stack_trace_hash = hash;

  }

  bool has_cached_stack_trace() const {

    return _stack_trace_id != max_julong;

  }

  void clear_cached_stack_trace() {

    _stack_trace_id = max_julong;

    _stack_trace_hash = 0;

  }

  traceid cached_stack_trace_id() const {

    return _stack_trace_id;

  }

  unsigned int cached_stack_trace_hash() const {

    return _stack_trace_hash;

  }

  void set_trace_block() {

    _entering_suspend_flag = 1;

  }

  void clear_trace_block() {

    _entering_suspend_flag = 0;

  }

  bool is_trace_block() const {

    return _entering_suspend_flag != 0;

  }

  u8 data_lost() const {

    return _data_lost;

  }

  u8 add_data_lost(u8 value);

  jlong get_user_time() const {

    return _user_time;

  }

  void set_user_time(jlong user_time) {

    _user_time = user_time;

  }

  jlong get_cpu_time() const {

    return _cpu_time;

  }

  void set_cpu_time(jlong cpu_time) {

    _cpu_time = cpu_time;

  }

  jlong get_wallclock_time() const {

    return _wallclock_time;

  }

  void set_wallclock_time(jlong wallclock_time) {

    _wallclock_time = wallclock_time;

  }

  traceid trace_id() const {

    return _trace_id;

  }

  traceid* const trace_id_addr() const {

    return &_trace_id;

  }

  void set_trace_id(traceid id) const {

    _trace_id = id;

  }

  bool is_dead() const {

    return _dead;

  }

  static void on_start(Thread* t);

  static void on_exit(Thread* t);

  // Code generation

  static ByteSize trace_id_offset();

  static ByteSize java_event_writer_offset();

};

#endif // SHARE_JFR_SUPPORT_JFRTHREADLOCAL_HPP