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src/share/vm/runtime/atomic.hpp@9f4457a14b58 (annotated)

src/share/vm/runtime/atomic.hpp

Wed, 09 Apr 2008 15:10:22 -0700

author

rasbold

date

Wed, 09 Apr 2008 15:10:22 -0700

changeset 544

9f4457a14b58

parent 435

a61af66fc99e

child 548

ba764ed4b6f2

permissions

-rw-r--r--

Merge

duke@435	1	/*
duke@435	2	* Copyright 1999-2003 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class Atomic : AllStatic {
duke@435	26	public:
duke@435	27	// Atomically store to a location
duke@435	28	static void store (jbyte store_value, jbyte* dest);
duke@435	29	static void store (jshort store_value, jshort* dest);
duke@435	30	static void store (jint store_value, jint* dest);
duke@435	31	static void store (jlong store_value, jlong* dest);
duke@435	32	static void store_ptr(intptr_t store_value, intptr_t* dest);
duke@435	33	static void store_ptr(void* store_value, void* dest);
duke@435	34
duke@435	35	static void store (jbyte store_value, volatile jbyte* dest);
duke@435	36	static void store (jshort store_value, volatile jshort* dest);
duke@435	37	static void store (jint store_value, volatile jint* dest);
duke@435	38	static void store (jlong store_value, volatile jlong* dest);
duke@435	39	static void store_ptr(intptr_t store_value, volatile intptr_t* dest);
duke@435	40	static void store_ptr(void* store_value, volatile void* dest);
duke@435	41
duke@435	42	// Atomically add to a location, return updated value
duke@435	43	static jint add (jint add_value, volatile jint* dest);
duke@435	44	static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest);
duke@435	45	static void* add_ptr(intptr_t add_value, volatile void* dest);
duke@435	46
duke@435	47	// Atomically increment location
duke@435	48	static void inc (volatile jint* dest);
duke@435	49	static void inc_ptr(volatile intptr_t* dest);
duke@435	50	static void inc_ptr(volatile void* dest);
duke@435	51
duke@435	52	// Atomically decrement a location
duke@435	53	static void dec (volatile jint* dest);
duke@435	54	static void dec_ptr(volatile intptr_t* dest);
duke@435	55	static void dec_ptr(volatile void* dest);
duke@435	56
duke@435	57	// Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest.
duke@435	58	static jint xchg (jint exchange_value, volatile jint* dest);
duke@435	59	static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest);
duke@435	60	static void* xchg_ptr(void* exchange_value, volatile void* dest);
duke@435	61
duke@435	62	// Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value
duke@435	63	// if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory
duke@435	64	// barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'.
duke@435	65	static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value);
duke@435	66	static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value);
duke@435	67	static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value);
duke@435	68	static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
duke@435	69	static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value);
duke@435	70	};