.\" %NetBSD: vslock.9,v 1.1 1996/06/15 20:47:29 pk Exp %
.\"
.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Paul Kranenburg.
.\"
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.\" 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
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.\" %FreeBSD: src/share/man/man9/vslock.9,v 1.4.2.1 2000/12/12 10:00:57 ru Exp %
.\"
.Dd June 15, 1996
.Dt VSLOCK 9
.Os FreeBSD
.Sh 名称
.Nm vslock ,
.Nm vsunlock
.Nd ユーザー空間のアドレスのメモリへのロックとアンロック
.Sh 書式
.Fd #include <sys/types.h>
.Fd #include <vm/vm.h>
.Fd #include <vm/vm_extern.h>
.Ft void
.Fn vslock "caddr_t addr" "u_int len"
.Ft void
.Fn vsunlock "caddr_t addr" "u_int len" "int dirtied"
.Sh 解説
.Fn vslock
および
.Fn vsunlock
関数は現在実行中のプロセスに属するアドレスの範囲を
メモリ中にそれぞれロックしたりアンロックしたりします。
ロックされる実際のメモリ量はマシンのページサイズの倍数になります。
開始ページナンバーは
.Fa addr
をすぐ前のページ境界に切りつめられ、終了ページは
.Fa addr +
.Fa len
の次のページ境界に切り上げられて計算されます。
この操作に使用されるプロセスのコンテキストはグローバル変数
.Va curproc
を参照します。
.Pp
.Sh 関連項目
.Xr physio 9
.Sh バグ
引数としてプロセスのポインタを渡すべきです。
