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| 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 valueSYNOPSIS¶
bool test_and_clear_bit(long nr, volatile unsigned long * addr);
ARGUMENTS¶
nrBit to clear
addr
Address to count from
DESCRIPTION¶
This operation is atomic and cannot be reordered. It also implies a memory barrier.COPYRIGHT¶
| April 2019 | Kernel Hackers Manual 4.9. |