\" $NetBSD: pthread_condattr.3,v 1.13 2025/02/10 20:40:55 riastradh Exp $
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\" $FreeBSD: src/lib/libpthread/man/pthread_condattr.3,v 1.10 2002/09/16 19:29:28 mini Exp $
Dd March 28, 2017
Dt PTHREAD_CONDATTR 3
Os
Sh NAME
Nm pthread_condattr_init ,
Nm pthread_condattr_getpshared ,
Nm pthread_condattr_setpshared ,
Nm pthread_condattr_getclock ,
Nm pthread_condattr_setclock
Nd condition attribute operations
Sh LIBRARY
Lb libpthread
Sh SYNOPSIS
In pthread.h
Ft int
Fn pthread_condattr_init "pthread_condattr_t *attr"
Ft int
Fn pthread_condattr_getclock "const pthread_condattr_t * restrict attr" \
"clockid_t * restrict clock_id"
Ft int
Fn pthread_condattr_setclock "pthread_condattr_t *attr" "clockid_t clock"
Ft int
Fn pthread_condattr_destroy "pthread_condattr_t *attr"
Ft int
Fn pthread_condattr_getpshared "const pthread_condattr_t * restrict attr" "int * restrict pshared"
Ft int
Fn pshared_condattr_setpshared "pthread_condattr_t *attr" "int pshared"
Sh DESCRIPTION
Condition attribute objects are used to specify parameters to the
Xr pthread_cond_init 3
function.
The
Fn pthread_condattr_init
function initializes a condition attribute object with the default attributes
and the
Fn pthread_condattr_destroy
function destroys a condition attribute object.
The
Fn pthread_condattr_getclock
function shall obtain the value of the
Fa clock
attributes object referenced by
Fa attr .
The
Fn pthread_condattr_setclock
function sets the system clock to be used for time comparisons to
the one specified in
Fa clock .
Valid clock values are
Dv CLOCK_MONOTONIC
and
Dv CLOCK_REALTIME
(the default).
The
Fn pthread_condattr_getpshared
function shall obtain the value of the process-shared attribute from the
attributes object referenced by
Fa attr .
The
Fn pthread_condattr_setpshared
function shall set the process-shared attribute in an initialized attributes
object referenced by
Fa attr .
Sh RETURN VALUES
If successful, these functions return 0.
Otherwise, an error number is returned to indicate the error.
Sh ERRORS
No errors are defined for
Fn pthread_condattr_init .
Pp
The
Fn pthread_condattr_destroy
function may fail if:
Bl -tag -width Er
It Bq Er EINVAL
The value specified by
Fa attr
is invalid.
El
Pp
The
Fn pthread_condattr_getclock
and
Fn pthread_condattr_setclock
may fail if:
Bl -tag -width Er
It Bq Er EINVAL
The value specified by
Fa attr
is invalid.
El
Pp
The
Fn pthread_condattr_getpshared
and
Fn pthread_condattr_setpshared
may fail if:
Bl -tag -width Er
It Bq Er EINVAL
The value specified by
Fa attr
is invalid.
El
Sh SEE ALSO
Xr pthread_cond_init 3
Sh STANDARDS
Both functions conform to
St -p1003.1-2001 .
Sh BUGS
The
Fn pthread_condattr_getpshared
and
Fn pthread_condattr_setpshared
functions are hidden by default since only thread shared attributes
are supported.

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