atomic_bits(9F) 					   Kernel Functions for Drivers 					   atomic_bits(9F)

NAME

       atomic_bits, atomic_set_long_excl, atomic_clear_long_excl - atomic set and clear bit operations

SYNOPSIS

       #include <sys/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);

DESCRIPTION

       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.

RETURN VALUES

       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.

ERRORS

       No errors are defined.

CONTEXT

       These functions can be called from user, interrupt, or kernel context.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       atomic_add(9F),	atomic_and(9F),  atomic_cas(9F),   atomic_dec(9F),   atomic_inc(9F),   atomic_or(9F),	atomic_swap(9F),   membar_ops(9F),
       attributes(5), atomic_ops(3C)

SunOS 5.11							    16 Jan 2006 						   atomic_bits(9F)