atomic_bits, atomic_set_long_excl, atomic_clear_long_excl - atomic set and clear
bit operations
#include <atomic.h>
int atomic_set_long_excl(volatile ulong_t *target, uint_t bit);
int atomic_clear_long_excl(volatile ulong_t *target, uint_t bit);
The atomic_set_long_excl() and atomic_clear_long_excl() functions
perform an exclusive atomic bit set or clear operation on target. The
value of bit specifies the number of the bit to be modified within
target. Bits are numbered from zero to one less than the maximum number of
bits in a long. If the value of bit falls outside of this range, the
result of the operation is undefined.
The atomic_set_long_excl() and atomic_clear_long_excl() functions
return 0 if bit was successfully set or cleared. They return -1 if
bit was already set or cleared.
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| Interface Stability |
Stable |
| MT-Level |
MT-Safe |