Module epcontext 

Runtime EpContext form and the source-keyed EpContextRegistry (docs/ORT2.md §55.1 / §55.6).

Two forms of one thing

An ORT com.microsoft::EPContext node is the on-disk / interchange form of a compiled-EP context (§55.1). The loader (onnx-runtime-loader) owns the typed view over that node (EpContextNode) and resolves its blob (EpContextBlob). This module owns the runtime form: the in-memory EpContext an EP produces via ExecutionProvider::save_context and consumes via ExecutionProvider::load_context, plus the registry that maps a node’s source attribute → the EpId that owns it.

Model-agnostic dispatch (hard rule, §55.6)

EP selection for an EPContext node is always by the node’s source attribute, resolved through EpContextRegistry — never by a hardcoded EP/vendor name. Each EP declares the source key(s) it accepts (from its own config/data, not code) via ExecutionProvider::context_source_keys; the registry maps key → EP. Adding a new compiled EP requires no change to loader/session dispatch code.

Structs

EpContext

The runtime form of a compiled-EP context (docs/ORT2.md §4 / §55.1).

EpContextRegistry

Registry mapping an EPContext node’s source key → the EpId that owns it (docs/ORT2.md §55.6).

Functions

build_ep_context_registry

Build an EpContextRegistry from a set of registered EPs (§55.6).