__TEST_AND_CLEAR_B
Section: LINUX (9)
Updated: August 2005
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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 non-atomic and can be reordered. If two examples of this operation race, one can appear to succeed but actually fail. You must protect multiple accesses with a lock.
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
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