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ATOMIC_INC_INT(9) FreeBSD Kernel Developer's Manual ATOMIC_INC_INT(9) NAME atomic_inc_int, atomic_inc_int_nv, atomic_inc_long, atomic_inc_long_nv - atomic increment operations SYNOPSIS #include <sys/atomic.h> void atomic_inc_int(volatile unsigned int *p); unsigned int atomic_inc_int_nv(volatile unsigned int *p); void atomic_inc_long(volatile unsigned long *p ); unsigned long atomic_inc_long_nv(volatile unsigned long *p); DESCRIPTION The atomic_inc set of functions provide an interface for atomically performing increment and increment-and-fetch operations with respect to interrupts and multiple processors in the system. The value referenced by the pointer p is incremented by 1. CONTEXT atomic_inc_int(), atomic_inc_int_nv(), atomic_inc_long(), and atomic_inc_long_nv() can all be called during autoconf, from process context, or from interrupt context. RETURN VALUES atomic_inc_int and atomic_inc_long perform the increment without returning any knowledge of the value at p. atomic_inc_int_nv and atomic_inc_long_nv return the value at p after the increment was performed. SEE ALSO atomic_add_int(9), atomic_dec_int(9) HISTORY The atomic_inc functions first appeared in NetBSD 5.0 and OpenBSD 5.5. FreeBSD 14.1-RELEASE-p8 February 13, 2014 FreeBSD 14.1-RELEASE-p8