Statistics processors

Description

Processors for collecting statistics.

Functions
template<typename Event, typename Downstream>
auto	tcspc::count (access_tracker< count_access > &&tracker, Downstream downstream)
	Create a processor that counts events of a given type.

Function Documentation

count()

template<typename Event, typename Downstream>

auto tcspc::count	(	access_tracker< count_access > &&	tracker,
		Downstream	downstream )

Create a processor that counts events of a given type.

The count can be retrieved through a tcspc::count_access retrieved from the tcspc::context from which tracker was obtained.

Note that the count is incremented before the events of type Event are sent to the downstream processor. This means that the event will be counted even if it subsequently results in an error or end-of-stream in a downstream processor.

Template Parameters

Event	type of event to count
Downstream	downstream processor type (usually deduced)

Parameters

tracker	access tracker for later access of the count result
downstream	downstream processor

Returns

processor

Events handled

• Event: increment the count; pass through
• All other types: pass through with no action
• Flush: pass through with no action