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 * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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.
 *
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#ifndef SHARE_VM_RUNTIME_CONTINUATIONENTRY_INLINE_HPP
#define SHARE_VM_RUNTIME_CONTINUATIONENTRY_INLINE_HPP

#include "runtime/continuationEntry.hpp"

#include "gc/shared/collectedHeap.hpp"
#include "memory/universe.hpp"
#include "runtime/frame.hpp"
#include "runtime/stackWatermarkSet.inline.hpp"
#include "runtime/thread.hpp"
#include "utilities/align.hpp"
#include CPU_HEADER_INLINE(continuationEntry)

inline intptr_t* ContinuationEntry::bottom_sender_sp() const {
  // the entry frame is extended if the bottom frame has stack arguments
  int entry_frame_extension = argsize() > 0 ? argsize() + frame::metadata_words_at_top : 0;
  intptr_t* sp = entry_sp() - entry_frame_extension;
#ifdef _LP64
  sp = align_down(sp, frame::frame_alignment);
#endif
  return sp;
}

inline bool is_stack_watermark_processing_started(const JavaThread* thread) {
  StackWatermark* sw = StackWatermarkSet::get(const_cast<JavaThread*>(thread), StackWatermarkKind::gc);

  if (sw == nullptr) {
    // No stale processing without stack watermarks
    return true;
  }

  return sw->processing_started();
}

inline oop ContinuationEntry::cont_oop(const JavaThread* thread) const {
  assert(!Universe::heap()->is_in((void*)&_cont), "Should not be in the heap");
  assert(is_stack_watermark_processing_started(thread != nullptr ? thread : JavaThread::current()), "Not processed");
  return *(oop*)&_cont;
}

inline oop ContinuationEntry::cont_oop_or_null(const ContinuationEntry* ce, const JavaThread* thread) {
  return ce == nullptr ? nullptr : ce->cont_oop(thread);
}

inline oop ContinuationEntry::scope(const JavaThread* thread) const {
  return Continuation::continuation_scope(cont_oop(thread));
}

#endif // SHARE_VM_RUNTIME_CONTINUATIONENTRY_INLINE_HPP