/* * Copyright (c) 2001, 2022, 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. *
*/
// The concurrent mark thread triggers the various steps of the concurrent marking // cycle, including various marking cleanup. class G1ConcurrentMarkThread: public ConcurrentGCThread { friendclass VMStructs;
// Wait for next cycle. Returns the command passed over. bool wait_for_next_cycle();
bool mark_loop_needs_restart() const;
// Phases and subphases for the full concurrent marking cycle in order. // // All these methods return true if the marking should be aborted. bool phase_clear_cld_claimed_marks(); bool phase_scan_root_regions();
// Total virtual time so far for this thread and concurrent marking tasks. double vtime_accum(); // Marking virtual time so far this thread and concurrent marking tasks. double vtime_mark_accum();
bool idle() const; // Returns true from the moment a concurrent cycle is // initiated (during the concurrent start pause when started() is set) // to the moment when the cycle completes (just after the next // marking bitmap has been cleared and in_progress() is // cleared). bool in_progress() const;
bool in_undo_mark() const;
};
#endif// SHARE_GC_G1_G1CONCURRENTMARKTHREAD_HPP
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