test_and_set_bit (9) - Linux Manuals
test_and_set_bit: Set a bit and return its old value
NAME
test_and_set_bit - Set a bit and return its old value
SYNOPSIS
-
bool test_and_set_bit(long
nr, volatile unsigned long * addr);
ARGUMENTS
nr
-
- Bit to set
addr
- Address to count from
DESCRIPTION
This operation is atomic and cannot be reordered. It also implies a memory barrier.
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