1*2fe8fb19SBen Gras.\" $NetBSD: _lwp_wait.2,v 1.4 2008/04/30 13:10:51 martin Exp $ 2*2fe8fb19SBen Gras.\" 3*2fe8fb19SBen Gras.\" Copyright (c) 2003 The NetBSD Foundation, Inc. 4*2fe8fb19SBen Gras.\" All rights reserved. 5*2fe8fb19SBen Gras.\" 6*2fe8fb19SBen Gras.\" This code is derived from software contributed to The NetBSD Foundation 7*2fe8fb19SBen Gras.\" by Jason R. Thorpe of Wasabi Systems, Inc. 8*2fe8fb19SBen Gras.\" 9*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 10*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 11*2fe8fb19SBen Gras.\" are met: 12*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 13*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 14*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 15*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 16*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 17*2fe8fb19SBen Gras.\" 18*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19*2fe8fb19SBen Gras.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20*2fe8fb19SBen Gras.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21*2fe8fb19SBen Gras.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22*2fe8fb19SBen Gras.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23*2fe8fb19SBen Gras.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24*2fe8fb19SBen Gras.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25*2fe8fb19SBen Gras.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26*2fe8fb19SBen Gras.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27*2fe8fb19SBen Gras.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28*2fe8fb19SBen Gras.\" POSSIBILITY OF SUCH DAMAGE. 29*2fe8fb19SBen Gras.\" 30*2fe8fb19SBen Gras.Dd January 13, 2003 31*2fe8fb19SBen Gras.Dt _LWP_WAIT 2 32*2fe8fb19SBen Gras.Os 33*2fe8fb19SBen Gras.Sh NAME 34*2fe8fb19SBen Gras.Nm _lwp_wait 35*2fe8fb19SBen Gras.Nd wait for light-weight process termination 36*2fe8fb19SBen Gras.Sh LIBRARY 37*2fe8fb19SBen Gras.Lb libc 38*2fe8fb19SBen Gras.Sh SYNOPSIS 39*2fe8fb19SBen Gras.In lwp.h 40*2fe8fb19SBen Gras.Ft int 41*2fe8fb19SBen Gras.Fn _lwp_wait "lwpid_t wlwp" "lwpid_t *rlwp" 42*2fe8fb19SBen Gras.Sh DESCRIPTION 43*2fe8fb19SBen Gras.Fn _lwp_wait 44*2fe8fb19SBen Grassuspends execution of the calling LWP until the LWP specified by 45*2fe8fb19SBen Gras.Fa wlwp 46*2fe8fb19SBen Grasterminates. 47*2fe8fb19SBen GrasThe specified LWP must not be detached. 48*2fe8fb19SBen GrasIf 49*2fe8fb19SBen Gras.Fa wlwp 50*2fe8fb19SBen Grasis 0, then 51*2fe8fb19SBen Gras.Fn _lwp_wait 52*2fe8fb19SBen Graswaits for any undetached LWP in the current process. 53*2fe8fb19SBen Gras.Pp 54*2fe8fb19SBen GrasIf 55*2fe8fb19SBen Gras.Fa rlwp 56*2fe8fb19SBen Grasis not 57*2fe8fb19SBen Gras.Dv NULL , 58*2fe8fb19SBen Grasthen it points to the location where the LWP ID of 59*2fe8fb19SBen Grasthe exited LWP is stored. 60*2fe8fb19SBen Gras.Sh RETURN VALUES 61*2fe8fb19SBen GrasUpon successful completion, 62*2fe8fb19SBen Gras.Fn _lwp_wait 63*2fe8fb19SBen Grasreturns a value of 0. 64*2fe8fb19SBen GrasOtherwise, an error code is returned to indicate the error. 65*2fe8fb19SBen Gras.Sh ERRORS 66*2fe8fb19SBen Gras.Fn _lwp_wait 67*2fe8fb19SBen Graswill fail if: 68*2fe8fb19SBen Gras.Bl -tag -width [EDEADLK] 69*2fe8fb19SBen Gras.It Bq Er ESRCH 70*2fe8fb19SBen GrasNo undetached LWP can be found in the current process corresponding to that 71*2fe8fb19SBen Grasspecified by 72*2fe8fb19SBen Gras.Fa wlwp . 73*2fe8fb19SBen Gras.It Bq Er EDEADLK 74*2fe8fb19SBen GrasThe calling LWP is the only LWP in the process. 75*2fe8fb19SBen Gras.It Bq Er EDEADLK 76*2fe8fb19SBen GrasThe LWP ID specified by 77*2fe8fb19SBen Gras.Fa wlwp 78*2fe8fb19SBen Grasis the LWP ID of the calling LWP. 79*2fe8fb19SBen Gras.It Bq Er EINTR 80*2fe8fb19SBen Gras.Fn _lwp_wait 81*2fe8fb19SBen Graswas interrupted by a caught signal, or the signal did not 82*2fe8fb19SBen Grashave the 83*2fe8fb19SBen Gras.Dv SA_RESTART 84*2fe8fb19SBen Grasflag set. 85*2fe8fb19SBen Gras.El 86*2fe8fb19SBen Gras.Sh SEE ALSO 87*2fe8fb19SBen Gras.Xr _lwp_create 2 , 88*2fe8fb19SBen Gras.Xr _lwp_exit 2 89*2fe8fb19SBen Gras.Sh HISTORY 90*2fe8fb19SBen GrasThe 91*2fe8fb19SBen Gras.Fn _lwp_wait 92*2fe8fb19SBen Grassystem call first appeared in 93*2fe8fb19SBen Gras.Nx 2.0 . 94