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src/share/vm/runtime/atomic.hpp@cd3d6a6b95d9 (annotated)

src/share/vm/runtime/atomic.hpp

Fri, 30 Nov 2012 15:23:16 -0800

author

twisti

date

Fri, 30 Nov 2012 15:23:16 -0800

changeset 4318

cd3d6a6b95d9

parent 2964

2a241e764894

child 4647

0598674c0056

permissions

-rw-r--r--

8003240: x86: move MacroAssembler into separate file
Reviewed-by: kvn

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_RUNTIME_ATOMIC_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_ATOMIC_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29
duke@435	30	class Atomic : AllStatic {
duke@435	31	public:
duke@435	32	// Atomically store to a location
twisti@4318	33	inline static void store (jbyte store_value, jbyte* dest);
twisti@4318	34	inline static void store (jshort store_value, jshort* dest);
twisti@4318	35	inline static void store (jint store_value, jint* dest);
twisti@4318	36	inline static void store (jlong store_value, jlong* dest);
twisti@4318	37	inline static void store_ptr(intptr_t store_value, intptr_t* dest);
twisti@4318	38	inline static void store_ptr(void* store_value, void* dest);
duke@435	39
twisti@4318	40	inline static void store (jbyte store_value, volatile jbyte* dest);
twisti@4318	41	inline static void store (jshort store_value, volatile jshort* dest);
twisti@4318	42	inline static void store (jint store_value, volatile jint* dest);
twisti@4318	43	inline static void store (jlong store_value, volatile jlong* dest);
twisti@4318	44	inline static void store_ptr(intptr_t store_value, volatile intptr_t* dest);
twisti@4318	45	inline static void store_ptr(void* store_value, volatile void* dest);
duke@435	46
twisti@4318	47	inline static jlong load(volatile jlong* src);
kvn@1329	48
duke@435	49	// Atomically add to a location, return updated value
twisti@4318	50	inline static jint add (jint add_value, volatile jint* dest);
twisti@4318	51	inline static intptr_t add_ptr(intptr_t add_value, volatile intptr_t* dest);
twisti@4318	52	inline static void* add_ptr(intptr_t add_value, volatile void* dest);
duke@435	53
twisti@4318	54	static jlong add (jlong add_value, volatile jlong* dest);
minqi@2964	55
duke@435	56	// Atomically increment location
twisti@4318	57	inline static void inc (volatile jint* dest);
twisti@4318	58	inline static void inc_ptr(volatile intptr_t* dest);
twisti@4318	59	inline static void inc_ptr(volatile void* dest);
duke@435	60
duke@435	61	// Atomically decrement a location
twisti@4318	62	inline static void dec (volatile jint* dest);
twisti@4318	63	inline static void dec_ptr(volatile intptr_t* dest);
twisti@4318	64	inline static void dec_ptr(volatile void* dest);
duke@435	65
duke@435	66	// Performs atomic exchange of *dest with exchange_value. Returns old prior value of *dest.
twisti@4318	67	inline static jint xchg(jint exchange_value, volatile jint* dest);
twisti@4318	68	static unsigned int xchg(unsigned int exchange_value, volatile unsigned int* dest);
coleenp@548	69
twisti@4318	70	inline static intptr_t xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest);
twisti@4318	71	inline static void* xchg_ptr(void* exchange_value, volatile void* dest);
duke@435	72
duke@435	73	// Performs atomic compare of *dest and compare_value, and exchanges *dest with exchange_value
duke@435	74	// if the comparison succeeded. Returns prior value of *dest. Guarantees a two-way memory
duke@435	75	// barrier across the cmpxchg. I.e., it's really a 'fence_cmpxchg_acquire'.
twisti@4318	76	static jbyte cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value);
twisti@4318	77	inline static jint cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value);
twisti@4318	78	inline static jlong cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value);
coleenp@548	79
twisti@4318	80	static unsigned int cmpxchg(unsigned int exchange_value,
twisti@4318	81	volatile unsigned int* dest,
twisti@4318	82	unsigned int compare_value);
coleenp@548	83
twisti@4318	84	inline static intptr_t cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
twisti@4318	85	inline static void* cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value);
duke@435	86	};
stefank@2314	87
stefank@2314	88	#endif // SHARE_VM_RUNTIME_ATOMIC_HPP