100 lines
3.1 KiB
Groff
100 lines
3.1 KiB
Groff
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.\" $NetBSD: _lwp_unpark_all.2,v 1.6 2010/11/02 20:49:47 skrll Exp $
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.\"
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.\" Copyright (c) 2003, 2007 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jason R. Thorpe of Wasabi Systems, Inc, and by Andrew Doran.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd February 10, 2007
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.Dt _LWP_UNPARK_ALL 2
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.Os
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.Sh NAME
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.Nm _lwp_unpark_all
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.Nd resume execution of a waiting LWP
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In lwp.h
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.Ft ssize_t
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.Fn _lwp_unpark_all "lwpid_t *targets" "size_t ntargets" "const void *hint"
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.Sh DESCRIPTION
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.Fn _lwp_unpark_all
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resumes execution of one or more light-weight processes listed in
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the array pointed to by
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.Fa targets .
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.Pp
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The target LWPs are assumed to be waiting in the kernel as a result of
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calls to
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.Fn _lwp_park .
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If any of the target LWPs are not currently waiting, those LWPs will return
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immediately upon the next call to
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.Fn _lwp_park .
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.Pp
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The value pointed to by
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.Fa ntargets
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specifies the size of the array pointed to by
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.Fa targets .
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If the
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.Fa targets
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argument is given as
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.Dv NULL ,
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the maximum size of the array (expressed
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as the number of entries) is returned.
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.Pp
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See
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.Xr _lwp_park 2
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for a description of the
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.Fa hint
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argument.
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.Sh RETURN VALUES
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If the maximum size of the
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.Fa targets
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array is not being queried, a return of 0 indicates that the call succeeded.
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A \-1 return value indicates an error occurred and
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.Va errno
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is set to indicate the reason.
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.Sh ERRORS
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.Bl -tag -width [EINVAL]
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.It Bq Er EFAULT
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The value specified for
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.Fa targets
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is invalid.
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.It Bq Er EINVAL
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The value specified for
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.Fa ntargets
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is out of range.
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.It Bq Er ENOMEM
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Insufficient resources are available to complete the operation.
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.El
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.Sh SEE ALSO
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.Xr _lwp_park 2 ,
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.Xr _lwp_unpark 2 ,
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.Xr _lwp_wakeup 2
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.Sh HISTORY
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The
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.Fn _lwp_unpark_all
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system call first appeared in
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.Nx 5.0 .
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