1 /* 2 * Copyright (c) 2017, 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_RUNTIME_SAFEPOINTMECHANISM_HPP 26 #define SHARE_VM_RUNTIME_SAFEPOINTMECHANISM_HPP 27 28 #include "runtime/globals.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/macros.hpp" 31 #include "utilities/sizes.hpp" 32 33 class JavaThread; 34 35 // This is the abstracted interface for the safepoint implementation 36 class SafepointMechanism : public AllStatic { 37 static inline bool global_poll(); 38 39 static void default_initialize(); 40 static void initialize_serialize_page(); 41 42 static void pd_initialize() NOT_AIX({ default_initialize(); }); 43 44 public: 45 46 // Call this method to see if this thread has depending poll and appropriate action should be taken 47 static inline bool poll(); 48 49 // Blocks a thread until safepoint is completed 50 static inline void block_if_requested(JavaThread* thread); 51 52 // Setup the selected safepoint mechanism 53 static void initialize(); 54 }; 55 56 #endif // SHARE_VM_RUNTIME_SAFEPOINTMECHANISM_HPP