1.\" $NetBSD: _lwp_unpark_all.2,v 1.4 2007/02/17 08:38:06 wiz Exp $ 2.\" 3.\" Copyright (c) 2003, 2007 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Jason R. Thorpe of Wasabi Systems, Inc, and by Andrew Doran. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd February 10, 2007 38.Dt _LWP_UNPARK_ALL 2 39.Os 40.Sh NAME 41.Nm _lwp_unpark_all 42.Nd resume execution of a waiting LWP 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In lwp.h 47.Ft ssize_t 48.Fn _lwp_unpark_all "lwpid_t *targets" "size_t ntargets" "const void *hint" 49.Sh DESCRIPTION 50.Fn _lwp_unpark_all 51resumes execution of one or more light-weight processes listed in 52the array pointed to by 53.Fa targets . 54.Pp 55The target LWPs are assumed to be waiting in the kernel as a result of 56calls to 57.Fn _lwp_park . 58If any of the target LWPs are not currently waiting, those LWPs will return 59immediatley upon the next call to 60.Fn _lwp_park . 61.Pp 62The value pointed to by 63.Fa ntargets 64specifies the size of the array pointed to by 65.Fa targets . 66If the 67.Fa targets 68argument is given as 69.Dv NULL , 70the maximum size of the array (expressed 71as the number of entries) is returned. 72.Pp 73See 74.Xr _lwp_park 2 75for a description of the 76.Fa hint 77argument. 78.Sh RETURN VALUES 79If the maximum size of the 80.Fa targets 81array is not being queried, a return of 0 indicates that the call succeeded. 82A \-1 return value indicates an error occurred and 83.Va errno 84is set to indicate the reason. 85.Sh ERRORS 86.Bl -tag -width [EINVAL] 87.It Bq Er EFAULT 88The value specified for 89.Fa targets 90is invalid. 91.It Bq Er EINVAL 92The value specified for 93.Fa ntargets 94is out of range. 95.It Bq Er ENOMEM 96Insufficient resources are available to complete the operation. 97.El 98.Sh SEE ALSO 99.Xr _lwp_park 2 , 100.Xr _lwp_unpark 2 , 101.Xr _lwp_wakeup 2 102.Sh HISTORY 103The 104.Fn _lwp_unpark_all 105system call first appeared in 106.Nx 5.0 . 107