1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP 26 #define SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP 27 28 #include "gc/parallel/psVirtualspace.hpp" 29 30 class PSFileBackedVirtualSpace : public PSVirtualSpace { 31 private: 32 const char* _file_path; 33 int _fd; 34 bool _mapping_succeeded; 35 public: 36 PSFileBackedVirtualSpace(ReservedSpace rs, size_t alignment, const char* file_path); 37 PSFileBackedVirtualSpace(ReservedSpace rs, const char* file_path); 38 39 bool initialize(); 40 bool expand_by(size_t bytes); 41 bool shrink_by(size_t bytes); 42 size_t expand_into(PSVirtualSpace* space, size_t bytes); 43 void release(); 44 }; 45 #endif // SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP 46