'\" te
.\" Copyright (c) 2005, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH atomic_swap 3C "13 May 2005" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
atomic_swap, atomic_swap_8, atomic_swap_uchar, atomic_swap_16,
atomic_swap_ushort, atomic_swap_32, atomic_swap_uint, atomic_swap_ulong,
atomic_swap_64, atomic_swap_ptr \- atomic swap operations
.SH SYNOPSIS
.LP
.nf
#include <atomic.h>

\fBuint8_t\fR \fBatomic_swap_8\fR(\fBvolatile uint8_t *\fR\fItarget\fR, \fBuint8_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBuchar_t\fR \fBatomic_swap_uchar\fR(\fBvolatile uchar_t *\fR\fItarget\fR, \fBuchar_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBuint16_t\fR \fBatomic_swap_16\fR(\fBvolatile uint16_t *\fR\fItarget\fR, \fBuint16_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBushort_t\fR \fBatomic_swap_ushort\fR(\fBvolatile ushort_t *\fR\fItarget\fR, \fBushort_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBuint32_t\fR \fBatomic_swap_32\fR(\fBvolatile uint32_t *\fR\fItarget\fR, \fBuint32_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBuint_t\fR \fBatomic_swap_uint\fR(\fBvolatile uint_t *\fR\fItarget\fR, \fBuint_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBulong_t\fR \fBatomic_swap_ulong\fR(\fBvolatile ulong_t *\fR\fItarget\fR, \fBulong_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBuint64_t\fR \fBatomic_swap_64\fR(\fBvolatile uint64_t *\fR\fItarget\fR, \fBuint64_t\fR \fInewval\fR);
.fi

.LP
.nf
\fBvoid *\fR\fBatomic_swap_ptr\fR(\fBvolatile void *\fR\fItarget\fR, \fBvoid *\fR\fInewval\fR);
.fi

.SH DESCRIPTION
.sp
.LP
These functions enable a swap operation to occur atomically. The value stored
in \fItarget\fR is replaced with \fInewval\fR. The old value is returned by the
function.
.SH RETURN VALUES
.sp
.LP
These functions return the old of *\fItarget\fR.
.SH ERRORS
.sp
.LP
No errors are defined.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityStable
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBatomic_add\fR(3C), \fBatomic_and\fR(3C), \fBatomic_bits\fR(3C),
\fBatomic_dec\fR(3C), \fBatomic_inc\fR(3C), \fBatomic_or\fR(3C),
\fBatomic_cas\fR(3C), \fBmembar_ops\fR(3C), \fBattributes\fR(5),
\fBatomic_ops\fR(9F)