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ATOMIC_OR(3) NetBSD Library Functions Manual ATOMIC_OR(3)
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by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
atomic_or, atomic_or_32, atomic_or_uint, atomic_or_ulong, atomic_or_64,
atomic_or_32_nv, atomic_or_uint_nv, atomic_or_ulong_nv, atomic_or_64_nv
-- atomic bitwise `or' operations
atomic_or_32(volatile uint32_t *ptr, uint32_t bits);
atomic_or_uint(volatile unsigned int *ptr, unsigned int bits);
atomic_or_ulong(volatile unsigned long *ptr, unsigned long bits);
atomic_or_64(volatile uint64_t *ptr, uint64_t bits);
atomic_or_32_nv(volatile uint32_t *ptr, uint32_t bits);
atomic_or_uint_nv(volatile unsigned int *ptr, unsigned int bits);
atomic_or_ulong_nv(volatile unsigned long *ptr, unsigned long bits);
atomic_or_64_nv(volatile uint64_t *ptr, uint64_t bits);
The atomic_or family of functions load the value of the variable refer-
enced by ptr, perform a bitwise `or' with the value bits, and store the
result back to the variable referenced by ptr in an atomic fashion.
The *_nv() variants of these functions return the new value.
The 64-bit variants of these functions are available only on platforms
that can support atomic 64-bit memory access. Applications can check for
the availability of 64-bit atomic memory operations by testing if the
pre-processor macro __HAVE_ATOMIC64_OPS is defined.
The atomic_or functions first appeared in NetBSD 5.0.
NetBSD 9.0 April 11, 2007 NetBSD 9.0