TEST_AND_CLEAR_BIT
Section: Basic C Library Functions (9)
Updated: February 2011
Index
Return to Main Contents
NAME
test_and_clear_bit - Clear a bit and return its old value
SYNOPSIS
-
int test_and_clear_bit(int nr, volatile unsigned long * addr);
ARGUMENTS
nr
-
- Bit to clear
addr
-
Address to count from
DESCRIPTION
This operation is atomic and cannot be reordered. It also implies a memory barrier.
COPYRIGHT