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.Dd April 7, 2013
.Dt ck_pr_fas 3
.Sh NAME
.Nm ck_pr_fas
.Nd atomic swap operation
.Sh LIBRARY
Concurrency Kit (libck, \-lck)
.Sh SYNOPSIS
.In ck_pr.h
.Ft void *
.Fn ck_pr_fas_ptr "void *target" "void *new_value"
.Ft double
.Fn ck_pr_fas_double "double *target" "double new_value"
.Ft char
.Fn ck_pr_fas_char "char *target" "char new_value"
.Ft unsigned int
.Fn ck_pr_fas_uint "unsigned int *target" "unsigned int new_value"
.Ft int
.Fn ck_pr_fas_int "int *target" "int new_value"
.Ft uint64_t
.Fn ck_pr_fas_64 "uint64_t *target" "uint64_t new_value"
.Ft uint32_t
.Fn ck_pr_fas_32 "uint32_t *target" "uint32_t new_value"
.Ft uint16_t
.Fn ck_pr_fas_16 "uint16_t *target" "uint16_t new_value"
.Ft uint8_t
.Fn ck_pr_fas_8 "uint8_t *target" "uint8_t new_value"
.Sh DESCRIPTION
The 
.Fn ck_pr_fas 3
family of functions atomically fetch the value pointed to
by
.Fa target
and replace the value pointed to by
.Fa target
with the value specified by
.Fa new_value .
.Sh RETURN VALUES
This function returns the value pointed to by
.Fa target
at the time of operation invocation before it was
atomically replaced with
.Fa new_value .
.Sh SEE ALSO
.Xr ck_pr_fence_load 3 ,
.Xr ck_pr_fence_load_depends 3 ,
.Xr ck_pr_fence_store 3 ,
.Xr ck_pr_fence_memory 3 ,
.Xr ck_pr_load 3 ,
.Xr ck_pr_store 3 ,
.Xr ck_pr_faa 3 ,
.Xr ck_pr_inc 3 ,
.Xr ck_pr_dec 3 ,
.Xr ck_pr_neg 3 , 
.Xr ck_pr_not 3 ,
.Xr ck_pr_add 3 ,
.Xr ck_pr_sub 3 ,
.Xr ck_pr_and 3 ,
.Xr ck_pr_or 3 ,
.Xr ck_pr_xor 3 ,
.Xr ck_pr_cas 3 ,
.Xr ck_pr_btc 3 ,
.Xr ck_pr_bts 3 ,
.Xr ck_pr_btr 3
.Pp
Additional information available at http://concurrencykit.org/