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.\"
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.\" Copyright 2013 Samy Al Bahra.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\"
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.Dd April 7, 2013
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.Dt ck_pr_fas 3
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.Sh NAME
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.Nm ck_pr_fas
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.Nd atomic swap operation
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.Sh LIBRARY
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Concurrency Kit (libck, \-lck)
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.Sh SYNOPSIS
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.In ck_pr.h
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.Ft void *
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.Fn ck_pr_fas_ptr "void *target" "void *new_value"
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.Ft double
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.Fn ck_pr_fas_double "double *target" "double new_value"
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.Ft char
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.Fn ck_pr_fas_char "char *target" "char new_value"
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.Ft unsigned int
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.Fn ck_pr_fas_uint "unsigned int *target" "unsigned int new_value"
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.Ft int
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.Fn ck_pr_fas_int "int *target" "int new_value"
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.Ft uint64_t
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.Fn ck_pr_fas_64 "uint64_t *target" "uint64_t new_value"
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.Ft uint32_t
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.Fn ck_pr_fas_32 "uint32_t *target" "uint32_t new_value"
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.Ft uint16_t
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.Fn ck_pr_fas_16 "uint16_t *target" "uint16_t new_value"
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.Ft uint8_t
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.Fn ck_pr_fas_8 "uint8_t *target" "uint8_t new_value"
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.Sh DESCRIPTION
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The
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.Fn ck_pr_fas 3
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family of functions atomically fetch the value pointed to
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by
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.Fa target
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and replace the value pointed to by
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.Fa target
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with the value specified by
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.Fa new_value .
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.Sh RETURN VALUES
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This function returns the value pointed to by
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.Fa target
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at the time of operation invocation before it was
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atomically replaced with
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.Fa new_value .
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.Sh SEE ALSO
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.Xr ck_pr_fence_load 3 ,
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.Xr ck_pr_fence_load_depends 3 ,
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.Xr ck_pr_fence_store 3 ,
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.Xr ck_pr_fence_memory 3 ,
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.Xr ck_pr_load 3 ,
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.Xr ck_pr_store 3 ,
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.Xr ck_pr_faa 3 ,
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.Xr ck_pr_inc 3 ,
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.Xr ck_pr_dec 3 ,
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.Xr ck_pr_neg 3 ,
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.Xr ck_pr_not 3 ,
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.Xr ck_pr_add 3 ,
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.Xr ck_pr_sub 3 ,
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.Xr ck_pr_and 3 ,
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.Xr ck_pr_or 3 ,
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.Xr ck_pr_xor 3 ,
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.Xr ck_pr_cas 3 ,
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.Xr ck_pr_btc 3 ,
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.Xr ck_pr_bts 3 ,
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.Xr ck_pr_btr 3
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.Pp
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Additional information available at http://concurrencykit.org/
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