Atomics.hh File Reference

Atomics for use in kernel code (CUDA/HIP/OpenMP). More...

#include "corecel/Assert.hh"
#include "corecel/Macros.hh"
#include "corecel/Types.hh"
#include "Algorithms.hh"

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Functions
template<class T >
CELER_FORCEINLINE_FUNCTION T	celeritas::atomic_add (T *address, T value)
	Add to a value, returning the original value. More...
template<class T >
CELER_FORCEINLINE_FUNCTION T	celeritas::atomic_min (T *address, T value)
	Set the value to the minimum of the actual and given, returning old.
template<class T >
CELER_FORCEINLINE_FUNCTION T	celeritas::atomic_max (T *address, T value)
	Set the value to the maximum of the actual and given, returning old.

Detailed Description

Atomics for use in kernel code (CUDA/HIP/OpenMP).

Function Documentation

atomic_add()

template<class T >

CELER_FORCEINLINE_FUNCTION T celeritas::atomic_add	(	T *	address,
		T	value
	)

Add to a value, returning the original value.

Note that on CPU, this assumes the atomic add is being done in with track-level parallelism rather than event-level because these utilities are meant for "kernel" code.

Warning

Multiple events must not use this function to simultaneously modify shared data.