| /* | |
| * Copyright (c) 2003, 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. | |
| * | |
| */ | |
| #ifndef SHARE_RUNTIME_PREFETCH_HPP | |
| #define SHARE_RUNTIME_PREFETCH_HPP | |
| #include "memory/allStatic.hpp" | |
| // If calls to prefetch methods are in a loop, the loop should be cloned | |
| // such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval | |
| // say not to do prefetching, these methods aren't called. At the very | |
| // least, they take up a memory issue slot. They should be implemented | |
| // as inline assembly code: doing an actual call isn't worth the cost. | |
| class Prefetch : AllStatic { | |
| public: | |
| // Prefetch anticipating read; must not fault, semantically a no-op | |
| static void read(const void* loc, intx interval); | |
| // Prefetch anticipating write; must not fault, semantically a no-op | |
| static void write(void* loc, intx interval); | |
| }; | |
| #endif // SHARE_RUNTIME_PREFETCH_HPP |