.\" %FreeBSD: src/lib/libc/sys/sched_yield.2,v 1.13 2004/07/02 23:52:13 ru Exp %
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.Dd March 12, 1998
.Dt SCHED_YIELD 2
.Os
.Sh 名称
.Nm sched_yield
.Nd プロセッサを明け渡す
.Sh ライブラリ
.Lb libc
.Sh 書式
.In sched.h
.Ft int
.Fn sched_yield void
.Sh 解説
.Fn sched_yield
システムコールは、実行中のプロセスが再びプロセスリストの先頭になるまで、
プロセッサを放棄させます。
引数はありません。
.Sh 戻り値
.Rv -std sched_yield
.Sh エラー
処理に失敗すると、
.Va errno
に対応する値が設定されます:
.Bl -tag -width Er
.It Bq Er ENOSYS
システムがこの機能をサポートするように構成されていません。
.El
.Sh 規格
.Fn sched_yield
システムコールは
.St -p1003.1b-93
に適合しています。