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src/hotspot/share/gc/shared/memset_with_concurrent_readers.hpp

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rev 59383 : [mq]: final
   1 /*
   2  * Copyright (c) 2015, 2019, 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_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
  26 #define SHARE_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
  27 
  28 #include "utilities/macros.hpp"
  29 
  30 #include <stddef.h>
  31 #include <string.h>
  32 
  33 // Fill a block of memory with value, like memset, but with the
  34 // understanding that there may be concurrent readers of that memory.
  35 void memset_with_concurrent_readers(void* to, int value, size_t size);
  36 
  37 #ifdef SPARC
  38 
  39 // SPARC requires special handling.  See SPARC-specific definition.
  40 
  41 #else
  42 // All others just use memset.
  43 
  44 inline void memset_with_concurrent_readers(void* to, int value, size_t size) {
  45   ::memset(to, value, size);
  46 }
  47 
  48 #endif // End of target dispatch.
  49 
  50 #endif // SHARE_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
   1 /*
   2  * Copyright (c) 2015, 2020, 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_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
  26 #define SHARE_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
  27 
  28 #include "utilities/macros.hpp"
  29 
  30 #include <stddef.h>
  31 #include <string.h>
  32 
  33 // Fill a block of memory with value, like memset, but with the
  34 // understanding that there may be concurrent readers of that memory.









  35 inline void memset_with_concurrent_readers(void* to, int value, size_t size) {
  36   ::memset(to, value, size);
  37 }


  38 
  39 #endif // SHARE_GC_SHARED_MEMSET_WITH_CONCURRENT_READERS_HPP
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