.\"	$NetBSD: _lwp_makecontext.3,v 1.4 2008/04/30 13:10:50 martin Exp $
.\"
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe of Wasabi Systems, Inc.
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.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
.In lwp.h
.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 .