idle - 使進程 0 空閒

內容簡介

#include <unistd.h>

int idle(void);

描述

idle() is an internal system call used during bootstrap. It marks the process’s pages as swappable, lowers its priority, and enters the main scheduling loop. idle() never returns.

Only process 0 may call idle(). Any user process, even a process with superuser permission, will receive EPERM.

返回值

idle() never returns for process 0, and always returns -1 for a user process.

錯誤

標簽	描述
EPERM	Always, for a user process.

遵循於

This function is Linux-specific, and should not be used in programs intended to be portable.

注意

Since 2.3.13 this system call does not exist anymore.