table of contents
| TEST_AND_CLEAR_BIT(9) | Basic C Library Functions | TEST_AND_CLEAR_BIT(9) |
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¶
| May 2024 | Kernel Hackers Manual 2.6. |