folly::fibers::createAtomicBatchDispatcher

Creates an AtomicBatchDispatcher that uses the given dispatch function.

Synopsis

Declared in <folly/fibers/AtomicBatchDispatcher.h>

template<
    typename InputT,
    typename ResultT>
AtomicBatchDispatcher<InputT, ResultT>
createAtomicBatchDispatcher(
    folly::Function<std::vector<ResultT>(std::vector<InputT>&&)> dispatchFunc,
    size_t initialCapacity = 0);

Description

initialCapacity is a hint about the number of inputs to expect:

  • It is used purely to reserve space for storing vector of inputs etc., so that reeallocation and move copy are reduced / not needed.

  • It is provided purely for performance reasons

Return Value

A new AtomicBatchDispatcher using dispatchFunc.

Parameters

NameDescription
dispatchFuncThe function that processes the batch of inputs.
initialCapacityHint for the number of inputs to reserve space for.