annotate src/share/vm/runtime/atomic.hpp @ 948:89e0543e1737

6884624: Update copyright year Summary: Update copyright for files that have been modified in 2009 through Septermber Reviewed-by: tbell, ohair
author xdono
date Tue, 22 Sep 2009 14:06:10 -0700
parents 665be97e8704
children c18cbe5936b8
rev   line source
duke@0 1 /*
xdono@948 2 * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
duke@0 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@0 20 * CA 95054 USA or visit if you need additional information or
duke@0 21 * have any questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 class Atomic : AllStatic {
duke@0 26 public:
duke@0 27 // Atomically store to a location
duke@0 28 static void store (jbyte store_value, jbyte* dest);
duke@0 29 static void store (jshort store_value, jshort* dest);
duke@0 30 static void store (jint store_value, jint* dest);
duke@0 31 static void store (jlong store_value, jlong* dest);
duke@0 32 static void store_ptr(intptr_t store_value, intptr_t* dest);
duke@0 33 static void store_ptr(void* store_value, void* dest);
duke@0 34
duke@0 35 static void store (jbyte store_value, volatile jbyte* dest);
duke@0 36 static void store (jshort store_value, volatile jshort* dest);
duke@0 37 static void store (jint store_value, volatile jint* dest);
duke@0 38 static void store (jlong store_value, volatile jlong* dest);
duke@0 39 static void store_ptr(intptr_t store_value, volatile intptr_t* dest);
duke@0 40 static void store_ptr(void* store_value, volatile void* dest);
duke@0 41
kvn@894 42 static jlong load(volatile jlong* src);
kvn@894 43
duke@0 44 // Atomically add to a location, return updated value
duke@0 45 static jint add (jint add_value, volatile jint* dest);
duke@0 46 static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest);
duke@0 47 static void* add_ptr(intptr_t add_value, volatile void* dest);
duke@0 48
duke@0 49 // Atomically increment location
duke@0 50 static void inc (volatile jint* dest);
duke@0 51 static void inc_ptr(volatile intptr_t* dest);
duke@0 52 static void inc_ptr(volatile void* dest);
duke@0 53
duke@0 54 // Atomically decrement a location
duke@0 55 static void dec (volatile jint* dest);
duke@0 56 static void dec_ptr(volatile intptr_t* dest);
duke@0 57 static void dec_ptr(volatile void* dest);
duke@0 58
duke@0 59 // Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest.
coleenp@113 60 static jint xchg(jint exchange_value, volatile jint* dest);
coleenp@113 61 static unsigned int xchg(unsigned int exchange_value,
coleenp@113 62 volatile unsigned int* dest);
coleenp@113 63
duke@0 64 static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest);
duke@0 65 static void* xchg_ptr(void* exchange_value, volatile void* dest);
duke@0 66
duke@0 67 // Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value
duke@0 68 // if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory
duke@0 69 // barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'.
duke@0 70 static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value);
duke@0 71 static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value);
duke@0 72 static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value);
coleenp@113 73
coleenp@113 74 static unsigned int cmpxchg(unsigned int exchange_value,
coleenp@113 75 volatile unsigned int* dest,
coleenp@113 76 unsigned int compare_value);
coleenp@113 77
duke@0 78 static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
duke@0 79 static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value);
duke@0 80 };