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src/share/vm/runtime/atomic.hpp@dd57230ba8fe (annotated)

src/share/vm/runtime/atomic.hpp

Tue, 05 Jan 2010 15:21:25 +0100

author

twisti

date

Tue, 05 Jan 2010 15:21:25 +0100

changeset 1573

dd57230ba8fe

parent 1383

89e0543e1737

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never

duke@435	1	/*
xdono@1383	2	* Copyright 1999-2009 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
kvn@1329	42	static jlong load(volatile jlong* src);
kvn@1329	43
duke@435	44	// Atomically add to a location, return updated value
duke@435	45	static jint add (jint add_value, volatile jint* dest);
duke@435	46	static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest);
duke@435	47	static void* add_ptr(intptr_t add_value, volatile void* dest);
duke@435	48
duke@435	49	// Atomically increment location
duke@435	50	static void inc (volatile jint* dest);
duke@435	51	static void inc_ptr(volatile intptr_t* dest);
duke@435	52	static void inc_ptr(volatile void* dest);
duke@435	53
duke@435	54	// Atomically decrement a location
duke@435	55	static void dec (volatile jint* dest);
duke@435	56	static void dec_ptr(volatile intptr_t* dest);
duke@435	57	static void dec_ptr(volatile void* dest);
duke@435	58
duke@435	59	// Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest.
coleenp@548	60	static jint xchg(jint exchange_value, volatile jint* dest);
coleenp@548	61	static unsigned int xchg(unsigned int exchange_value,
coleenp@548	62	volatile unsigned int* dest);
coleenp@548	63
duke@435	64	static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest);
duke@435	65	static void* xchg_ptr(void* exchange_value, volatile void* dest);
duke@435	66
duke@435	67	// Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value
duke@435	68	// if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory
duke@435	69	// barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'.
duke@435	70	static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value);
duke@435	71	static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value);
duke@435	72	static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value);
coleenp@548	73
coleenp@548	74	static unsigned int cmpxchg(unsigned int exchange_value,
coleenp@548	75	volatile unsigned int* dest,
coleenp@548	76	unsigned int compare_value);
coleenp@548	77
duke@435	78	static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
duke@435	79	static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value);
duke@435	80	};