Kokkos::atomic_exchange

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Daniel Arndt edited this page May 1, 2020 · 3 revisions

`Kokkos::atomic_exchange`

Header File: Kokkos_Core.hpp

Usage:

old_val = atomic_exchange(ptr_to_value,new_value);

Atomically sets the value at the address given by ptr_to_value to new_value and returns the previously stored value at the address.

Synopsis

  template<class T>
  T atomic_exchange(T* const ptr_to_value, const T new_value);

Description

```
template<class T>
T atomic_exchange(T* const ptr_to_value, const T new_value);
```
Atomically executes old_value = *ptr_to_value; *ptr_to_value = new_value; return old_value;.
- ptr_to_value: address of the to be updated value.
- new_value: new value.
- old_value: value at address ptr_to_value before doing the exchange.