CoreV2

CoreV2 parses Batcher v2 super-frames and exposes parsed record metadata through Data objects plus header/tail iterators. For conceptual guidance, see Batcher Protocol.

Protocol reference: https://confluence.slac.stanford.edu/x/L2VlK

CoreV2 objects in C++ are referenced by the following shared pointer typedef:

typedef std::shared_ptr<rogue::protocols::batcher::CoreV2> rogue::protocols::batcher::CoreV2Ptr [header]

The class description is shown below:

class CoreV2 [header]

Parser for SLAC AXI Batcher v2 super-frames.

Protocol reference: https://confluence.slac.stanford.edu/x/L2VlK

CoreV2 parses one incoming batched stream frame into:

A fixed-size super-header region.
A list of per-record Data descriptors.
A list of tail iterators for each record.

This class is the shared parser used by SplitterV2 and InverterV2.

SplitterV2 uses parsed Data records to emit one frame per batch entry.
InverterV2 uses parsed tail/header locations to rewrite framing in place.

Record accessors (record(), beginTail(), endTail()) expose records in stream order, even though parsing walks tails from the end of the frame.

Threading model:

No internal threads are created.
The object is intended for single-threaded use per instance.

Public Functions

CoreV2() [header] [impl]

Constructs a CoreV2 parser.

Creator with version constant.

This constructor is a low-level C++ allocation path. Prefer create() when shared ownership or Python exposure is required.

~CoreV2() [header] [impl]

Destroys the parser.

Deconstructor.

void initSize(uint32_t size) [header] [impl]

Pre-reserves internal record/tail container capacity.

Init size for internal containers.

Parameters:: size – Expected maximum record count per frame.

uint32_t count() [header] [impl]

Returns number of parsed records.

Record count.

Returns:: Parsed record count.

uint32_t headerSize() [header] [impl]

Returns parsed super-header size.

Get header size.

Returns:: Header size in bytes.

rogue::interfaces::stream::FrameIterator beginHeader() [header] [impl]

Returns iterator to beginning of parsed header.

Get beginning of header iterator.

Returns:: Header-begin iterator.

rogue::interfaces::stream::FrameIterator endHeader() [header] [impl]

Returns iterator to end of parsed header.

Get end of header iterator.

Returns:: Header-end iterator.

uint32_t tailSize() [header] [impl]

Returns parsed tail size per record.

Get tail size.

Returns:: Tail size in bytes.

rogue::interfaces::stream::FrameIterator beginTail(uint32_t index) [header] [impl]

Returns iterator to beginning of a parsed record tail.

Get beginning of tail iterator.

Parameters:: index – Zero-based record index in stream order.
Returns:: Tail-begin iterator for requested record.

rogue::interfaces::stream::FrameIterator endTail(uint32_t index) [header] [impl]

Returns iterator to end of a parsed record tail.

Get end of tail iterator.

Parameters:: index – Zero-based record index in stream order.
Returns:: Tail-end iterator for requested record.

std::shared_ptr<rogue::protocols::batcher::Data> &record(uint32_t index) [header] [impl]

Returns parsed data record descriptor by index.

Get data.

Parameters:: index – Zero-based record index in stream order.
Returns:: Reference to parsed Data record pointer.

uint32_t sequence() [header] [impl]

Returns parsed batch sequence number.

Return sequence.

Returns:: Sequence number from super-header.

bool processFrame(std::shared_ptr<rogue::interfaces::stream::Frame> frame) [header] [impl]

Parses a batched frame and populates parser state.

Process a frame.

On success, header/tail metadata and record descriptors are available through the accessor methods. On failure, parser state is reset and false is returned.

Parameters:: frame – Input batched frame.
Returns:: true if frame is valid and parsed; otherwise false.

void reset() [header] [impl]

Clears parsed frame state and record lists.

Reset data.

Public Static Functions

static void setup_python() [header] [impl]

Registers Python bindings for this class.

Setup class in python.

static std::shared_ptr<rogue::protocols::batcher::CoreV2> create() [header] [impl]

Creates a CoreV2 parser instance.

Class creation.

This static factory is the preferred construction path when the object is shared across Rogue graph connections or exposed to Python. It returns std::shared_ptr ownership compatible with Rogue pointer typedefs.

Company : SLAC National Accelerator Laboratory

Description : AXI Batcher V2 (https://confluence.slac.stanford.edu/x/L2VlK)

The batcher protocol starts with a super header followed by a number of frames each with a tail to define the boundaries of each frame.

Super Header: 2 bytes

Byte 0: Bits 3:0 = Version = 2 Bits 7:4 = Reserved Byte 1: Bits 15:8 = Sequence # for debug

Frame Tail: 7 bytes

Word 0: 4 bytes bits 31:0 = size Word 1: 3 bytes bits 7:0 = Destination bits 15:8 = First user bits 23:16 = Last user

This file is part of the rogue software platform. It is subject to the license terms in the LICENSE.txt file found in the top-level directory of this distribution and at: https://confluence.slac.stanford.edu/display/ppareg/LICENSE.html. No part of the rogue software platform, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the LICENSE.txt file.

Returns:: Shared pointer to the created parser.