/*
 * Copyright (c) 2020, Red Hat, Inc. 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
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP
#define SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP

#include "memory/allocation.hpp"
#include "runtime/vmThread.hpp"
#include "runtime/vmOperations.hpp"


class ShenandoahSafepoint : public AllStatic {
public:
  // check if Shenandoah GC safepoint is in progress
  static inline bool is_at_shenandoah_safepoint() {
    if (!SafepointSynchronize::is_at_safepoint()) return false;

    VM_Operation* vm_op = VMThread::vm_operation();
    if (vm_op == NULL) return false;

    VM_Operation::VMOp_Type type = vm_op->type();
    return type == VM_Operation::VMOp_ShenandoahInitMark ||
           type == VM_Operation::VMOp_ShenandoahFinalMarkStartEvac ||
           type == VM_Operation::VMOp_ShenandoahFinalEvac ||
           type == VM_Operation::VMOp_ShenandoahInitTraversalGC ||
           type == VM_Operation::VMOp_ShenandoahFinalTraversalGC ||
           type == VM_Operation::VMOp_ShenandoahInitUpdateRefs ||
           type == VM_Operation::VMOp_ShenandoahFinalUpdateRefs ||
           type == VM_Operation::VMOp_ShenandoahFullGC ||
           type == VM_Operation::VMOp_ShenandoahDegeneratedGC;
  }
};

#endif // SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP