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macosx
macosx/JackAtomic_os.h
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/*
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Copyright (C) 2004-2008 Grame
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __JackAtomic_APPLE__
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#define __JackAtomic_APPLE__
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#include "JackTypes.h"
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#if defined(__ppc__) || defined(__ppc64__)
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static
inline
int
CAS(
register
UInt32 value,
register
UInt32 newvalue,
register
volatile
void
* addr)
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{
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register
int
result;
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asm
volatile
(
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"# CAS \n"
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" lwarx r0, 0, %1 \n"
// creates a reservation on addr
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" cmpw r0, %2 \n"
// test value at addr
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" bne- 1f \n"
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" sync \n"
// synchronize instructions
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" stwcx. %3, 0, %1 \n"
// if the reservation is not altered
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// stores the new value at addr
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" bne- 1f \n"
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" li %0, 1 \n"
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" b 2f \n"
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"1: \n"
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" li %0, 0 \n"
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"2: \n"
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:
"=r"
(result)
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:
"r"
(addr),
"r"
(value),
"r"
(newvalue)
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:
"r0"
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);
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return
result;
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}
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#endif
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#if defined(__i386__) || defined(__x86_64__)
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#define LOCK "lock ; "
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static
inline
char
CAS(
volatile
UInt32 value, UInt32 newvalue,
volatile
void
* addr)
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{
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register
char
ret;
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__asm__ __volatile__ (
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"# CAS \n\t"
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LOCK
"cmpxchg %2, (%1) \n\t"
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"sete %0 \n\t"
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:
"=a"
(ret)
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:
"c"
(addr),
"d"
(newvalue),
"a"
(value)
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);
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return
ret;
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}
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#endif
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#endif
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