1.\" $NetBSD: _lwp_unpark_all.2,v 1.6 2010/11/02 20:49:47 skrll 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.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 10, 2007 31.Dt _LWP_UNPARK_ALL 2 32.Os 33.Sh NAME 34.Nm _lwp_unpark_all 35.Nd resume execution of a waiting LWP 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In lwp.h 40.Ft ssize_t 41.Fn _lwp_unpark_all "lwpid_t *targets" "size_t ntargets" "const void *hint" 42.Sh DESCRIPTION 43.Fn _lwp_unpark_all 44resumes execution of one or more light-weight processes listed in 45the array pointed to by 46.Fa targets . 47.Pp 48The target LWPs are assumed to be waiting in the kernel as a result of 49calls to 50.Fn _lwp_park . 51If any of the target LWPs are not currently waiting, those LWPs will return 52immediately upon the next call to 53.Fn _lwp_park . 54.Pp 55The value pointed to by 56.Fa ntargets 57specifies the size of the array pointed to by 58.Fa targets . 59If the 60.Fa targets 61argument is given as 62.Dv NULL , 63the maximum size of the array (expressed 64as the number of entries) is returned. 65.Pp 66See 67.Xr _lwp_park 2 68for a description of the 69.Fa hint 70argument. 71.Sh RETURN VALUES 72If the maximum size of the 73.Fa targets 74array is not being queried, a return of 0 indicates that the call succeeded. 75A \-1 return value indicates an error occurred and 76.Va errno 77is set to indicate the reason. 78.Sh ERRORS 79.Bl -tag -width [EINVAL] 80.It Bq Er EFAULT 81The value specified for 82.Fa targets 83is invalid. 84.It Bq Er EINVAL 85The value specified for 86.Fa ntargets 87is out of range. 88.It Bq Er ENOMEM 89Insufficient resources are available to complete the operation. 90.El 91.Sh SEE ALSO 92.Xr _lwp_park 2 , 93.Xr _lwp_unpark 2 , 94.Xr _lwp_wakeup 2 95.Sh HISTORY 96The 97.Fn _lwp_unpark_all 98system call first appeared in 99.Nx 5.0 . 100