/*

 * Copyright (c) 2017, 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_JNI_JFRJAVACALL_HPP

#define SHARE_VM_JFR_JNI_JFRJAVACALL_HPP

#include "jni.h"

#include "jfr/utilities/jfrAllocation.hpp"

#include "utilities/exceptions.hpp"

class JavaCallArguments;

class JavaThread;

class JavaValue;

class Klass;

class Symbol;

class JfrJavaArguments : public StackObj {

  friend class JfrJavaCall;

 public:

  JfrJavaArguments(JavaValue* result);

  JfrJavaArguments(JavaValue* result, const char* klass_name, const char* name, const char* signature, TRAPS);

  JfrJavaArguments(JavaValue* result, const Klass* klass, const Symbol* name, const Symbol* signature);

  Klass* klass() const;

  void set_klass(const char* klass_name, TRAPS);

  void set_klass(const Klass* klass);

  Symbol* name() const;

  void set_name(const char* name, TRAPS);

  void set_name(const Symbol* name);

  Symbol* signature() const;

  void set_signature(const char* signature, TRAPS);

  void set_signature(const Symbol* signature);

  int array_length() const;

  void set_array_length(int length);

  JavaValue* result() const;

  bool has_receiver() const;

  void set_receiver(const oop receiver);

  void set_receiver(Handle receiver);

  oop receiver() const;

  // parameters

  void push_oop(const oop obj);

  void push_oop(Handle h_obj);

  void push_jobject(jobject h);

  void push_int(jint i);

  void push_double(jdouble d);

  void push_long(jlong l);

  void push_float(jfloat f);

  int length() const;

  const JavaValue& param(int idx) const;

 private:

  class Parameters {

    friend class JfrJavaArguments;

   private:

    enum { SIZE = 16};

    JavaValue _storage[SIZE];

    int _storage_index;

    int _java_stack_slots;

    Parameters();

    Parameters(const Parameters&); // no impl

    Parameters& operator=(const Parameters&); // no impl

    void push(const JavaValue& value);

    void push_large(const JavaValue& value);

    void push_oop(const oop obj);

    void push_oop(Handle h_obj);

    void push_jobject(jobject h);

    void push_jint(jint i);

    void push_jdouble(jdouble d);

    void push_jlong(jlong l);

    void push_jfloat(jfloat f);

    bool has_receiver() const;

    void set_receiver(const oop receiver);

    void set_receiver(Handle receiver);

    oop receiver() const;

    int length() const;

    int java_stack_slots() const;

    void copy(JavaCallArguments& args, TRAPS) const;

    const JavaValue& values(int idx) const;

  };

  Parameters _params;

  const JavaValue* const _result;

  const Klass* _klass;

  const Symbol* _name;

  const Symbol* _signature;

  int _array_length;

  int java_call_arg_slots() const;

  void copy(JavaCallArguments& args, TRAPS);

};

class JfrJavaCall : public AllStatic {

  friend class JfrJavaSupport;

 private:

  static void call_static(JfrJavaArguments* args, TRAPS);

  static void call_special(JfrJavaArguments* args, TRAPS);

  static void call_virtual(JfrJavaArguments* args, TRAPS);

};

#endif // SHARE_VM_JFR_JNI_JFRJAVACALL_HPP