1 /* 2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONNECTIONMATRIX_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONNECTIONMATRIX_HPP 26 27 #include "memory/allocation.hpp" 28 29 class ShenandoahConnectionMatrix : public CHeapObj<mtGC> { 30 private: 31 const uint _stride; 32 char* _matrix; 33 34 size_t index_of(uint from_idx, uint to_idx) const; 35 36 public: 37 ShenandoahConnectionMatrix(uint max_regions); 38 39 ~ShenandoahConnectionMatrix(); 40 41 bool is_connected(uint from_idx, uint to_idx) const; 42 43 void set_connected(uint from_idx, uint to_idx, bool connected); 44 void clear_region_outbound(uint idx); 45 void clear_region(uint idx); 46 void clear_all(); 47 48 address matrix_addr() { return (address) _matrix; } 49 uint stride() { return _stride; } 50 void print_on(outputStream* st) const; 51 }; 52 53 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONNECTIONMATRIX_HPP