atomic_compare_exchange_strong

Header File: Kokkos_Core.hpp

Usage:

was_exchanged = atomic_compare_exchange_strong(ptr_to_value,comparison_value, new_value);

Atomically sets the value at the address given by ptr_to_value to new_value if the current value at ptr_to_value is equal to comparison_value, and returns true if the exchange has happened.

Synopsis

template<class T>
bool atomic_compare_exchange_strong(T* const ptr_to_value, const T comparison_value, const T new_value);

Description

• template<class T>
  bool atomic_compare_exchange_strong(T* const ptr_to_value, const T comparison_value, const T new_value);
  

  Atomically executes old_value = *ptr_to_value; if(old_value==comparison_value) *ptr_to_value = new_value; return old_value==comparison_value;.

  • ptr_to_value: address of the to be updated value.

  • comparison_value: value to be comapred to.

  • new_value: new value.

  • old_value: value at address ptr_to_value before doing the exchange.