Luna::atom_exchange_u64

u64 atom_exchange_u64(u64 volatile *dst, u64 v)

Atomically replace the value of the variable with the value provided.

This operation cannot be interrupted by system thread switching.

Parameters

• in dst

  The pointer to the variable that needs to be changed.

• in v

  The value that needs to be set to the variable.

Return value

Returns the value of the variable before this operation took place.