__test_and_set_bit9
Set a bit and return its old value
Usage
bool __test_and_set_bit(long nr, volatile unsigned long * addr);
Arguments
nr
Bit to set
addr
Address to count from
Overview
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.
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.