1.\" $NetBSD: _lwp_wakeup.2,v 1.5 2008/04/30 13:10:51 martin Exp $ 2.\" 3.\" Copyright (c) 2003 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. 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 January 13, 2003 31.Dt _LWP_WAKEUP 2 32.Os 33.Sh NAME 34.Nm _lwp_wakeup 35.Nd make a blocked light-weight process runnable 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In lwp.h 40.Ft int 41.Fn _lwp_wakeup "lwpid_t lwp" 42.Sh DESCRIPTION 43.Fn _lwp_wakeup 44makes a blocked LWP runnable. The blocked LWP must be in 45.Dv LSSLEEP 46state. 47Unblocking the LWP does not guarantee that it will make progress; it 48may block again as soon as it resumes execution in the kernel. 49.Sh RETURN VALUES 50Upon successful completion, 51.Fn _lwp_wakeup 52returns a value of 0. 53Otherwise, an error code is returned to indicate the error. 54.Sh ERRORS 55.Fn _lwp_wakeup 56will fail if: 57.Bl -tag -width [ENODEV] 58.It Bq Er ESRCH 59No LWP can be found in the current process corresponding to that 60specified by 61.Fa lwp . 62.It Bq Er ENODEV 63The specified LWP is not in 64.Dv LSSLEEP 65state. 66.It Bq Er EBUSY 67The specified LWP is blocked in an uninterruptible sleep. 68.El 69.Sh HISTORY 70The 71.Fn _lwp_wakeup 72system call first appeared in 73.Nx 2.0 . 74