Mercurial > hg > truffle
annotate src/share/vm/runtime/atomic.cpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | ba764ed4b6f2 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_atomic.cpp.incl" | |
| 27 | |
| 28 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { | |
| 29 assert(sizeof(jbyte) == 1, "assumption."); | |
| 30 uintptr_t dest_addr = (uintptr_t)dest; | |
| 31 uintptr_t offset = dest_addr % sizeof(jint); | |
| 32 volatile jint* dest_int = (volatile jint*)(dest_addr - offset); | |
| 33 jint cur = *dest_int; | |
| 34 jbyte* cur_as_bytes = (jbyte*)(&cur); | |
| 35 jint new_val = cur; | |
| 36 jbyte* new_val_as_bytes = (jbyte*)(&new_val); | |
| 37 new_val_as_bytes[offset] = exchange_value; | |
| 38 while (cur_as_bytes[offset] == compare_value) { | |
| 39 jint res = cmpxchg(new_val, dest_int, cur); | |
| 40 if (res == cur) break; | |
| 41 cur = res; | |
| 42 new_val = cur; | |
| 43 new_val_as_bytes[offset] = exchange_value; | |
| 44 } | |
| 45 return cur_as_bytes[offset]; | |
| 46 } | |
|
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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47 |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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48 unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) { |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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49 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
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50 return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest); |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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51 } |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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52 |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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53 unsigned Atomic::cmpxchg(unsigned int exchange_value, |
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54 volatile unsigned int* dest, unsigned int compare_value) { |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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55 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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56 return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest, |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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57 (jint)compare_value); |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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58 } |