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ATOMIC_SETBITS_INT(9)    BSD Kernel Developer's Manual   ATOMIC_SETBITS_INT(9)

NAME
     atomic_setbits_int, atomic_clearbits_int -- interface to perform atomic
     operations on data

SYNOPSIS
     #include <&lt;sys/atomic.h>&gt;

     void
     atomic_setbits_int(unsigned int *p, unsigned int b);

     void
     atomic_clearbits_int(unsigned int *p, unsigned int b);

DESCRIPTION
     The atomic bits set of functions provide an interface for changing data
     atomically with respect to interrupts and multiple processors in the sys-
     tem.

     The atomic_setbits_int() function sets the bits in b in the integer
     pointed to by p.  It is equivalent to

           *p |= b;

     The atomic_clearbits_int() function clears the bits in b in the integer
     pointed to by p.  It is equivalent to

           *p &= ~b;

CONTEXT
     atomic_setbits_int(), and atomic_clearbits_int() can be called during
     autoconf, from process context, or from interrupt context.

SEE ALSO
     atomic_add_int(9), atomic_cas_uint(9), atomic_dec_int(9),
     atomic_inc_int(9), atomic_sub_int(9), atomic_swap_uint(9)

HISTORY
     The atomic_setbits_int functions first appeared in OpenBSD 4.1.

BSD                            February 13, 2014                           BSD