test_and_change_bit9
Change a bit and return its old value
Usage
bool test_and_change_bit(long nr, volatile unsigned long * addr);
Arguments
nr
Bit to change
addr
Address to count from
Overview
This operation is atomic and cannot be reordered. It also implies a memory barrier.
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.