sync.atomic ≡

template <typename T, T InitialValue = {}>
inline pair<T, T> atomically((T) -> T modify) §source

Atomically apply user specified function to internal state of type T, returning both old and new state value. Note that a state is maintained per each call site of this inline function.

Parameters

  • typename T

    Type of the internal state

  • T InitialValue = {}

    Initial value

template <auto N, typename T, T InitialValue = {}>
inline pair<T, T> atomically_one_of(index_t<N> i, (T) -> T modify) §source

Atomically interleave updates among multiple threads to internal state of type T[N]. Return both old and new element value. A state is maintained per each call site of this inline function.

Parameters

  • auto N

    Size of state array. Must be between 2 and 8 inclusive.

  • typename T

    Type of the internal state.

  • T InitialValue = {}

    Initial value.