jdk8-mips64-public/hotspot: src/share/vm/runtime/orderAccess.cpp@d0994e5bebce

6822204: volatile fences should prefer lock:addl to actual mfence instructions
Reviewed-by: kvn, phh

     1 /*

     2  * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_orderAccess.cpp.incl"

    28 volatile intptr_t OrderAccess::dummy = 0;

    30 void OrderAccess::StubRoutines_fence() {

    31   // Use a stub if it exists.  It may not exist during bootstrap so do

    32   // nothing in that case but assert if no fence code exists after threads have been created

    33   void (*func)() = CAST_TO_FN_PTR(void (*)(), StubRoutines::fence_entry());

    35   if (func != NULL) {

    36     (*func)();

    37     return;

    38   }

    39   assert(Threads::number_of_threads() == 0, "for bootstrap only");

    40 }

Mercurial > jdk8-mips64-public > hotspot / file revision