jdk8-mips64-public/hotspot: src/share/vm/runtime/atomic.hpp@018d5b58dd4f

6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
Summary: Initial checkin of JSDT code
Reviewed-by: acorn, sbohne

     1 /*

     2  * Copyright 1999-2003 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 class Atomic : AllStatic {

    26  public:

    27   // Atomically store to a location

    28   static void store    (jbyte    store_value, jbyte*    dest);

    29   static void store    (jshort   store_value, jshort*   dest);

    30   static void store    (jint     store_value, jint*     dest);

    31   static void store    (jlong    store_value, jlong*    dest);

    32   static void store_ptr(intptr_t store_value, intptr_t* dest);

    33   static void store_ptr(void*    store_value, void*     dest);

    35   static void store    (jbyte    store_value, volatile jbyte*    dest);

    36   static void store    (jshort   store_value, volatile jshort*   dest);

    37   static void store    (jint     store_value, volatile jint*     dest);

    38   static void store    (jlong    store_value, volatile jlong*    dest);

    39   static void store_ptr(intptr_t store_value, volatile intptr_t* dest);

    40   static void store_ptr(void*    store_value, volatile void*     dest);

    42   // Atomically add to a location, return updated value

    43   static jint     add    (jint     add_value, volatile jint*     dest);

    44   static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest);

    45   static void*    add_ptr(intptr_t add_value, volatile void*     dest);

    47   // Atomically increment location

    48   static void inc    (volatile jint*     dest);

    49   static void inc_ptr(volatile intptr_t* dest);

    50   static void inc_ptr(volatile void*     dest);

    52   // Atomically decrement a location

    53   static void dec    (volatile jint*     dest);

    54   static void dec_ptr(volatile intptr_t* dest);

    55   static void dec_ptr(volatile void*     dest);

    57   // Performs atomic exchange of *dest with exchange_value.  Returns old prior value of *dest.

    58   static jint         xchg(jint     exchange_value, volatile jint*     dest);

    59   static unsigned int xchg(unsigned int exchange_value,

    60                            volatile unsigned int* dest);

    62   static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest);

    63   static void*    xchg_ptr(void*    exchange_value, volatile void*   dest);

    65   // Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value

    66   // if the comparison succeeded.  Returns prior value of *dest.  Guarantees a two-way memory

    67   // barrier across the cmpxchg.  I.e., it's really a 'fence_cmpxchg_acquire'.

    68   static jbyte    cmpxchg    (jbyte    exchange_value, volatile jbyte*    dest, jbyte    compare_value);

    69   static jint     cmpxchg    (jint     exchange_value, volatile jint*     dest, jint     compare_value);

    70   static jlong    cmpxchg    (jlong    exchange_value, volatile jlong*    dest, jlong    compare_value);

    72   static unsigned int cmpxchg(unsigned int exchange_value,

    73                               volatile unsigned int* dest,

    74                               unsigned int compare_value);

    76   static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);

    77   static void*    cmpxchg_ptr(void*    exchange_value, volatile void*     dest, void*    compare_value);

    78 };

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