__test_and_clear_bit

Langue: en

Autres versions - même langue

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

Section: 9 (Appels noyau Linux)

Sommaire

NAME

__test_and_clear_bit - Clear a bit and return its old value

SYNOPSIS

int __test_and_clear_bit(int nr, volatile void * addr);

ARGUMENTS

nr

Bit to clear

addr

Address to count from

DESCRIPTION

This operation is non-atomic and can be reordered. If two examples of this operation race, one can appear to succeed but actually fail. You must protect multiple accesses with a lock.