|
|
|
|
.\"
|
|
|
|
|
.\" Copyright 2013 Samy Al Bahra.
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.\"
|
|
|
|
|
.Dd April 7, 2013
|
|
|
|
|
.Dt ck_pr_dec 3
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm ck_pr_dec_ptr ,
|
|
|
|
|
.Nm ck_pr_dec_ptr_zero ,
|
|
|
|
|
.Nm ck_pr_dec_ptr_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_double ,
|
|
|
|
|
.Nm ck_pr_dec_double_zero ,
|
|
|
|
|
.Nm ck_pr_dec_double_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_char ,
|
|
|
|
|
.Nm ck_pr_dec_char_zero ,
|
|
|
|
|
.Nm ck_pr_dec_char_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_uint ,
|
|
|
|
|
.Nm ck_pr_dec_uint_zero ,
|
|
|
|
|
.Nm ck_pr_dec_char_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_int ,
|
|
|
|
|
.Nm ck_pr_dec_int_zero ,
|
|
|
|
|
.Nm ck_pr_dec_int_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_64 ,
|
|
|
|
|
.Nm ck_pr_dec_64_zero ,
|
|
|
|
|
.Nm ck_pr_dec_64_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_32 ,
|
|
|
|
|
.Nm ck_pr_dec_32_zero ,
|
|
|
|
|
.Nm ck_pr_dec_32_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_16 ,
|
|
|
|
|
.Nm ck_pr_dec_16_zero ,
|
|
|
|
|
.Nm ck_pr_dec_32_is_zero ,
|
|
|
|
|
.Nm ck_pr_dec_8 ,
|
|
|
|
|
.Nm ck_pr_dec_8_zero ,
|
|
|
|
|
.Nm ck_pr_dec_8_is_zero
|
|
|
|
|
.Nd atomic decrement operations
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
Concurrency Kit (libck, \-lck)
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.In ck_pr.h
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_ptr "void *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_ptr_zero "void *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_ptr_is_zero "void *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_double "double *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_double_zero "double *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_double_is_zero "double *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_char "char *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_char_zero "char *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_char_is_zero "char *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_uint "unsigned int *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_uint_zero "unsigned int *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_uint_is_zero "unsigned int *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_int "int *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_int_zero "int *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_int_is_zero "int *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_64 "uint64_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_64_zero "uint64_t *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_64_is_zero "uint64_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_32 "uint32_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_32_zero "uint32_t *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_32_is_zero "uint32_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_16 "uint16_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_16_zero "uint16_t *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_16_is_zero "uint16_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_8 "uint8_t *target"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn ck_pr_dec_8_zero "uint8_t *target" "bool *z"
|
|
|
|
|
.Ft bool
|
|
|
|
|
.Fn ck_pr_dec_8_is_zero "uint8_t *target"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn ck_pr_dec 3
|
|
|
|
|
family of functions atomically decrement the value pointed to
|
|
|
|
|
by
|
|
|
|
|
.Fa target .
|
|
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
The ck_pr_dec_zero family of functions set the value pointed to by
|
|
|
|
|
.Fa z
|
|
|
|
|
to true if the result
|
|
|
|
|
of the decrement operation was 0. They set the value pointed to by
|
|
|
|
|
.Fa z
|
|
|
|
|
to false otherwise.
|
|
|
|
|
The ck_pr_dec_is_zero family of function return true if the result
|
|
|
|
|
of the decrement operation was 0 and false otherwise.
|
|
|
|
|
.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_fas 3 ,
|
|
|
|
|
.Xr ck_pr_faa 3 ,
|
|
|
|
|
.Xr ck_pr_inc 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/
|
