/*

 * Copyright (c) 1998, 2013, 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_HANDLES_INLINE_HPP

#define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP

#include "runtime/handles.hpp"

#include "runtime/thread.inline.hpp"

// these inline functions are in a separate file to break an include cycle

// between Thread and Handle

inline Handle::Handle(oop obj) {

  if (obj == NULL) {

    _handle = NULL;

  } else {

    _handle = Thread::current()->handle_area()->allocate_handle(obj);

  }

}

#ifndef ASSERT

inline Handle::Handle(Thread* thread, oop obj) {

  assert(thread == Thread::current(), "sanity check");

  if (obj == NULL) {

    _handle = NULL;

  } else {

    _handle = thread->handle_area()->allocate_handle(obj);

  }

}

#endif // ASSERT

// Constructors for metadata handles

#define DEF_METADATA_HANDLE_FN(name, type) \

inline name##Handle::name##Handle(type* obj) : _value(obj), _thread(NULL) {       \

  if (obj != NULL) {                                                   \

    assert(((Metadata*)obj)->is_valid(), "obj is valid");              \

    _thread = Thread::current();                                       \

    assert (_thread->is_in_stack((address)this), "not on stack?");     \

    _thread->metadata_handles()->push((Metadata*)obj);                 \

  }                                                                    \

}                                                                      \

inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \

  if (obj != NULL) {                                                   \

    assert(((Metadata*)obj)->is_valid(), "obj is valid");              \

    assert(_thread == Thread::current(), "thread must be current");    \

    assert (_thread->is_in_stack((address)this), "not on stack?");     \

    _thread->metadata_handles()->push((Metadata*)obj);                 \

  }                                                                    \

}                                                                      \

inline name##Handle::name##Handle(const name##Handle &h) {             \

  _value = h._value;                                                   \

  if (_value != NULL) {                                                \

    assert(_value->is_valid(), "obj is valid");                        \

    if (h._thread != NULL) {                                           \

      assert(h._thread == Thread::current(), "thread must be current");\

      _thread = h._thread;                                             \

    } else {                                                           \

      _thread = Thread::current();                                     \

    }                                                                  \

    assert (_thread->is_in_stack((address)this), "not on stack?");     \

    _thread->metadata_handles()->push((Metadata*)_value);              \

  } else {                                                             \

    _thread = NULL;                                                    \

  }                                                                    \

}                                                                      \

inline name##Handle& name##Handle::operator=(const name##Handle &s) {  \

  remove();                                                            \

  _value = s._value;                                                   \

  if (_value != NULL) {                                                \

    assert(_value->is_valid(), "obj is valid");                        \

    if (s._thread != NULL) {                                           \

      assert(s._thread == Thread::current(), "thread must be current");\

      _thread = s._thread;                                             \

    } else {                                                           \

      _thread = Thread::current();                                     \

    }                                                                  \

    assert (_thread->is_in_stack((address)this), "not on stack?");     \

    _thread->metadata_handles()->push((Metadata*)_value);              \

  } else {                                                             \

    _thread = NULL;                                                    \

  }                                                                    \

  return *this;                                                        \

}                                                                      \

inline void name##Handle::remove() {                                   \

  if (_value != NULL) {                                                \

    int i = _thread->metadata_handles()->find_from_end((Metadata*)_value); \

    assert(i!=-1, "not in metadata_handles list");                     \

    _thread->metadata_handles()->remove_at(i);                         \

  }                                                                    \

}                                                                      \

inline name##Handle::~name##Handle () { remove(); }                    \

DEF_METADATA_HANDLE_FN(method, Method)

DEF_METADATA_HANDLE_FN(constantPool, ConstantPool)

inline HandleMark::HandleMark() {

  initialize(Thread::current());

}

inline void HandleMark::push() {

  // This is intentionally a NOP. pop_and_restore will reset

  // values to the HandleMark further down the stack, typically

  // in JavaCalls::call_helper.

  debug_only(_area->_handle_mark_nesting++);

}

inline void HandleMark::pop_and_restore() {

  HandleArea* area = _area;   // help compilers with poor alias analysis

  // Delete later chunks

  if( _chunk->next() ) {

    // reset arena size before delete chunks. Otherwise, the total

    // arena size could exceed total chunk size

    assert(area->size_in_bytes() > size_in_bytes(), "Sanity check");

    area->set_size_in_bytes(size_in_bytes());

    _chunk->next_chop();

  } else {

    assert(area->size_in_bytes() == size_in_bytes(), "Sanity check");

  }

  // Roll back arena to saved top markers

  area->_chunk = _chunk;

  area->_hwm = _hwm;

  area->_max = _max;

  debug_only(area->_handle_mark_nesting--);

}

#endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP