Segment Traversal Lambda Function Reference

Table of Contents

• Element Traversal Lambda Functions
  • Full Form (With All Parameters)
  • Brief Form (Without Local Index)
• Segment View Lambda Functions
  • Segment View Lambda
• Segment Condition Lambda Functions
  • Condition Check
• Related Pages

This page provides a comprehensive reference for all lambda function signatures used in segment traversal operations.

Element Traversal Lambda Functions

These lambda functions are used when iterating over individual elements within segments.

Full Form (With All Parameters)

auto f = [=] __cuda_callable__ ( IndexType segmentIdx, IndexType localIdx, IndexType globalIdx ) {...}

Parameters:

• segmentIdx - The index of the segment to which the given element belongs
• localIdx - The rank (position) of the element within the segment
• globalIdx - The global index of the element within the range of all elements managed by the segments

Brief Form (Without Local Index)

auto f = [=] __cuda_callable__ ( IndexType segmentIdx, IndexType globalIdx ) {...}

In case when the local index within the segment is not required, this brief form can be used. It may lead to better performance.

Parameters:

• segmentIdx - The index of the segment to which the given element belongs
• globalIdx - The global index of the element within the range of all elements managed by the segments

Segment View Lambda Functions

These lambda functions are used when iterating over segments as a whole, operating on SegmentView objects.

Segment View Lambda

auto f = [=] __cuda_callable__ ( const SegmentView& segment ) {...}

Parameters:

• segment - A view representing the given segment (see TNL::Algorithms::Segments::SegmentView). The segment view provides access to segment properties and its elements.

Segment Condition Lambda Functions

These lambda functions are used to determine whether a segment should be processed (used in "If" variants).

Condition Check

auto f = [=] __cuda_callable__ ( IndexType segmentIdx ) -> bool {...}

Parameters:

• segmentIdx - The index of the segment
• Returns: true if the segment (or its elements) should be processed, false otherwise

Related Pages

• Overview of Segment Traversal Functions - Overview of segment traversal functions