/*

 * Copyright (c) 1997, 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_RUNTIME_JAVA_HPP

#define SHARE_VM_RUNTIME_JAVA_HPP

#include "runtime/os.hpp"

// Execute code before all handles are released and thread is killed; prologue to vm_exit

extern void before_exit(JavaThread * thread);

// Forced VM exit (i.e, internal error or JVM_Exit)

extern void vm_exit(int code);

// Wrapper for ::exit()

extern void vm_direct_exit(int code);

// Shutdown the VM but do not exit the process

extern void vm_shutdown();

// Shutdown the VM and abort the process

extern void vm_abort(bool dump_core=true);

// Trigger any necessary notification of the VM being shutdown

extern void notify_vm_shutdown();

// VM exit if error occurs during initialization of VM

extern void vm_exit_during_initialization();

extern void vm_exit_during_initialization(Handle exception);

extern void vm_exit_during_initialization(Symbol* exception_name, const char* message);

extern void vm_exit_during_initialization(const char* error, const char* message = NULL);

extern void vm_shutdown_during_initialization(const char* error, const char* message = NULL);

/**

 * With the integration of the changes to handle the version string

 * as defined by JEP-223, most of the code related to handle the version

 * string prior to JDK 1.6 was removed (partial initialization)

 */

class JDK_Version {

  friend class VMStructs;

  friend class Universe;

  friend void JDK_Version_init();

 private:

  static JDK_Version _current;

  static const char* _runtime_name;

  static const char* _runtime_version;

  uint8_t _major;

  uint8_t _minor;

  uint8_t _security;

  uint8_t _patch;

  uint8_t _build;

  bool _thread_park_blocker;

  bool _post_vm_init_hook_enabled;

  bool is_valid() const {

    return (_major != 0);

  }

  // initializes or partially initializes the _current static field

  static void initialize();

 public:

  JDK_Version() : _major(0), _minor(0), _security(0), _patch(0), _build(0),

                  _thread_park_blocker(false), _post_vm_init_hook_enabled(false)

                  {}

  JDK_Version(uint8_t major, uint8_t minor = 0, uint8_t security = 0,

              uint8_t patch = 0, uint8_t build = 0,

              bool thread_park_blocker = false, bool post_vm_init_hook_enabled = false) :

      _major(major), _minor(minor), _security(security), _patch(patch), _build(build),

      _thread_park_blocker(thread_park_blocker),

      _post_vm_init_hook_enabled(post_vm_init_hook_enabled)

      {}

  // Returns the current running JDK version

  static JDK_Version current() { return _current; }

  // Factory methods for convenience

  static JDK_Version jdk(uint8_t m) {

    return JDK_Version(m);

  }

  static JDK_Version undefined() {

    return JDK_Version(0);

  }

  bool is_undefined() const {

    return _major == 0;

  }

  uint8_t major_version() const          { return _major; }

  uint8_t minor_version() const          { return _minor; }

  uint8_t security_version() const       { return _security; }

  uint8_t patch_version() const          { return _patch; }

  uint8_t build_number() const           { return _build; }

  bool supports_thread_park_blocker() const {

    return _thread_park_blocker;

  }

  bool post_vm_init_hook_enabled() const {

    return _post_vm_init_hook_enabled;

  }

  // Performs a full ordering comparison using all fields (patch, build, etc.)

  int compare(const JDK_Version& other) const;

  /**

   * Performs comparison using only the major version, returning negative

   * if the major version of 'this' is less than the parameter, 0 if it is

   * equal, and a positive value if it is greater.

   */

  int compare_major(int version) const {

      return major_version() - version;

  }

  void to_string(char* buffer, size_t buflen) const;

  static const char* runtime_name() {

    return _runtime_name;

  }

  static void set_runtime_name(const char* name) {

    _runtime_name = name;

  }

  static const char* runtime_version() {

    return _runtime_version;

  }

  static void set_runtime_version(const char* version) {

    _runtime_version = version;

  }

};

#endif // SHARE_VM_RUNTIME_JAVA_HPP