2003-04-16 17:34:34 +04:00
|
|
|
.\" $NetBSD: _lwp_makecontext.3,v 1.3 2003/04/16 13:34:35 wiz Exp $
|
2003-01-18 13:52:16 +03:00
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
|
|
|
.\" by Jason R. Thorpe of Wasabi Systems, Inc.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
|
|
|
.\" must display the following acknowledgement:
|
|
|
|
|
.\" This product includes software developed by the NetBSD
|
|
|
|
|
.\" Foundation, Inc. and its contributors.
|
|
|
|
|
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
|
|
|
.\" contributors may be used to endorse or promote products derived
|
|
|
|
|
.\" from this software without specific prior written permission.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
|
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
|
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
|
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.Dd January 16, 2003
|
|
|
|
|
.Dt _LWP_MAKECONTEXT 3
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm _lwp_makecontext
|
|
|
|
|
.Nd create a new initial light-weight process execution context
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libc
|
|
|
|
|
.Sh SYNOPSIS
|
2003-04-16 17:34:34 +04:00
|
|
|
.In lwp.h
|
2003-01-18 13:52:16 +03:00
|
|
|
.Ft void
|
|
|
|
|
.Fn _lwp_makecontext "ucontext_t *context" "void (*start_routine)(void *)" \
|
|
|
|
|
"void *arg" "void *private" "caddr_t stack_base" "size_t stack_size"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
.Fn _lwp_makecontext
|
|
|
|
|
initializes the context structure pointed to by
|
|
|
|
|
.Fa context
|
|
|
|
|
in a manner suitable for using with
|
|
|
|
|
.Xr _lwp_create 2 .
|
|
|
|
|
The LWP will begin execution at the function specified by
|
|
|
|
|
.Fa start_routine
|
|
|
|
|
which will be passed a single argument
|
|
|
|
|
.Fa arg .
|
|
|
|
|
The LWP private data pointer will be set to
|
|
|
|
|
.Fa private .
|
|
|
|
|
The stack region for the new LWP is specified by the
|
|
|
|
|
.Fa stack_base
|
|
|
|
|
and
|
|
|
|
|
.Fa stack_size
|
|
|
|
|
arguments.
|
|
|
|
|
.Pp
|
|
|
|
|
The signal mask in the context structure is not initialized by
|
|
|
|
|
.Fn _lwp_makecontext .
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr _lwp_create 2 ,
|
|
|
|
|
.Xr _lwp_getprivate 2
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
|
|
|
|
.Fn _lwp_create
|
|
|
|
|
system call first appeared in
|
|
|
|
|
.Nx 2.0 .
|
|
|
|
|
.Sh BUGS
|
|
|
|
|
The LWP private data pointer is not initialized by the current
|
|
|
|
|
implementation of
|
|
|
|
|
.Fn _lwp_makecontext .
|
