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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 valueSYNOPSIS¶
bool test_and_change_bit(long nr,
volatile unsigned long * addr);
ARGUMENTS¶
nrBit to change
addr
Address to count from
DESCRIPTION¶
This operation is atomic and cannot be reordered. It also implies a memory barrier.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 4.9. |