Atomically AND a value into an atomic object (C11)
#include <stdatomic.h> C atomic_fetch_and( volatile A *obj, M arg ); C atomic_fetch_and_explicit( volatile A *obj, M arg, memory_order order );
The atomic_fetch_and() and atomic_fetch_and_explicit() functions are generic functions that atomically AND the given value in to the given atomic object. The atomic_fetch_and() function orders memory access according to memory_order_seq_cst; atomic_fetch_and_explicit() orders them as specified by order.
The previous value of the atomic object. The C represents the non-atomic data type that corresponds to the atomic object.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Read the Caveats |
Signal handler | Read the Caveats |
Thread | Yes |
If this function is lock-free (see atomic_is_lock_free()), it's safe to call it from an ISR or signal handler.