# Manual browser: atomic_and(3)

ATOMIC_AND(3) | Library Functions Manual | ATOMIC_AND(3) |

# NAME

**atomic_and**,

**atomic_and_32**,

**atomic_and_uint**,

**atomic_and_ulong**,

**atomic_and_64**,

**atomic_and_32_nv**,

**atomic_and_uint_nv**,

**atomic_and_ulong_nv**,

**atomic_and_64_nv**— atomic logical ‘and’ operations

# SYNOPSIS

**#include <sys/atomic.h>**

*void*

**atomic_and_32**(*volatile uint32_t *ptr*, *uint32_t bits*);

*void*

**atomic_and_uint**(*volatile unsigned int *ptr*, *unsigned int bits*);

*void*

**atomic_and_ulong**(*volatile unsigned long *ptr*, *unsigned long bits*);

*void*

**atomic_and_64**(*volatile uint64_t *ptr*, *uint64_t bits*);

*uint32_t*

**atomic_and_32_nv**(*volatile uint32_t *ptr*, *uint32_t bits*);

*unsigned int*

**atomic_and_uint_nv**(*volatile unsigned int *ptr*, *unsigned int bits*);

*unsigned long*

**atomic_and_ulong_nv**(*volatile unsigned long *ptr*, *unsigned long bits*);

*uint64_t*

**atomic_and_64_nv**(*volatile uint64_t *ptr*, *uint64_t bits*);

# DESCRIPTION

The**atomic_and**family of functions load the value of the variable referenced by

*ptr*, perform a logical ‘and’ 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.

# SEE ALSO

atomic_ops(3)# HISTORY

The**atomic_and**functions first appeared in NetBSD 5.0.

April 11, 2007 | NetBSD 7.0 |