table of contents
| TEST_AND_CHANGE_BIT(9) | Basic C Library Functions | TEST_AND_CHANGE_BIT(9) |
NAME¶
test_and_change_bit - Change a bit and return its old value
SYNOPSIS¶
int test_and_change_bit(int nr, volatile unsigned long * addr);
ARGUMENTS¶
nr
Bit to change
addr
Address to count from
DESCRIPTION¶
This operation is atomic and cannot be reordered. It also implies a memory barrier.
COPYRIGHT¶
| April 2023 | Kernel Hackers Manual 2.6. |