list_empty_careful

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

NAME

list_empty_careful - tests whether a list is empty and not being modified

SYNOPSIS

int list_empty_careful(const struct list_head * head);

ARGUMENTS

head

the list to test

DESCRIPTION

tests whether a list is empty _and_ checks that no other CPU might be in the process of modifying either member (next or prev)

NOTE

using list_empty_careful without synchronization can only be safe if the only activity that can happen to the list entry is list_del_init. Eg. it cannot be used if another CPU could re-list_add it.