jdk8-mips64-public/hotspot: src/share/vm/utilities/accessFlags.cpp@dc1769738300

     1 /*

     2  * Copyright (c) 1997, 2013, 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  */

    25 #include "precompiled.hpp"

    26 #include "oops/oop.inline.hpp"

    27 #include "utilities/accessFlags.hpp"

    28 #ifdef TARGET_OS_FAMILY_linux

    29 # include "os_linux.inline.hpp"

    30 #endif

    31 #ifdef TARGET_OS_FAMILY_solaris

    32 # include "os_solaris.inline.hpp"

    33 #endif

    34 #ifdef TARGET_OS_FAMILY_windows

    35 # include "os_windows.inline.hpp"

    36 #endif

    37 #ifdef TARGET_OS_FAMILY_aix

    38 # include "os_aix.inline.hpp"

    39 #endif

    40 #ifdef TARGET_OS_FAMILY_bsd

    41 # include "os_bsd.inline.hpp"

    42 #endif

    45 void AccessFlags::atomic_set_bits(jint bits) {

    46   // Atomically update the flags with the bits given

    47   jint old_flags, new_flags, f;

    48   do {

    49     old_flags = _flags;

    50     new_flags = old_flags | bits;

    51     f = Atomic::cmpxchg(new_flags, &_flags, old_flags);

    52   } while(f != old_flags);

    53 }

    55 void AccessFlags::atomic_clear_bits(jint bits) {

    56   // Atomically update the flags with the bits given

    57   jint old_flags, new_flags, f;

    58   do {

    59     old_flags = _flags;

    60     new_flags = old_flags & ~bits;

    61     f = Atomic::cmpxchg(new_flags, &_flags, old_flags);

    62   } while(f != old_flags);

    63 }

    65 // Returns true iff this thread succeeded setting the bit.

    66 bool AccessFlags::atomic_set_one_bit(jint bit) {

    67   // Atomically update the flags with the bit given

    68   jint old_flags, new_flags, f;

    69   bool is_setting_bit = false;

    70   do {

    71     old_flags = _flags;

    72     new_flags = old_flags | bit;

    73     is_setting_bit = old_flags != new_flags;

    74     f = Atomic::cmpxchg(new_flags, &_flags, old_flags);

    75   } while(f != old_flags);

    77   return is_setting_bit;

    78 }

    80 #if !defined(PRODUCT) || INCLUDE_JVMTI

    82 void AccessFlags::print_on(outputStream* st) const {

    83   if (is_public      ()) st->print("public "      );

    84   if (is_private     ()) st->print("private "     );

    85   if (is_protected   ()) st->print("protected "   );

    86   if (is_static      ()) st->print("static "      );

    87   if (is_final       ()) st->print("final "       );

    88   if (is_synchronized()) st->print("synchronized ");

    89   if (is_volatile    ()) st->print("volatile "    );

    90   if (is_transient   ()) st->print("transient "   );

    91   if (is_native      ()) st->print("native "      );

    92   if (is_interface   ()) st->print("interface "   );

    93   if (is_abstract    ()) st->print("abstract "    );

    94   if (is_strict      ()) st->print("strict "      );

    95   if (is_synthetic   ()) st->print("synthetic "   );

    96   if (is_old         ()) st->print("{old} "       );

    97   if (is_obsolete    ()) st->print("{obsolete} "  );

    98   if (on_stack       ()) st->print("{on_stack} "  );

    99 }

   101 #endif // !PRODUCT || INCLUDE_JVMTI

   103 void accessFlags_init() {

   104   assert(sizeof(AccessFlags) == sizeof(jint), "just checking size of flags");

   105 }

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