Module runtime 

The concurrency, timing, logging and OS-facing primitives an IOC is built on — C libCom’s epicsThread / epicsTime / errlog / envDefs half.

The two backends

task’s spawn/sleep/interval seam has two mutually exclusive backends, selected by this crate’s build.rs into one cfg rather than repeated as a target/feature predicate at each of the ~two dozen seam sites:

• tokio_backend — the tokio runtime. The hosted default.
• exec_backend — the std-thread background executor (callback pool + delayed timer + scanOnce worker). Unconditional on RTEMS, which has no tokio reactor, and host-selectable through the rtems-exec-model feature for a Linux blocking-front-end deployment that wants the same runtime-free backend.

crate::EXEC_BACKEND states which one this build got, so a crate above can pin its own copy of the predicate to it.

Modules

accept

Backoff for a server accept loop, shared by every accept loop in the workspace.

background

RTEMS-side background-execution infrastructure (CA sans-io refactor, increment W3a — the seam backend).

blocking_io

Blocking socket ⇄ AsyncRead/AsyncWrite adapters: the byte source for every reactor-free driver in the workspace.

build_info

The three EPICS_BUILD_* environment parameters.

env

EPICS environment parameters — C’s envSubr.c.

env_table

EPICS environment parameters — the Rust envData.c.

epics_string

C libCom epicsString.c — the escape-translation half.

fs

Filesystem operations through the runtime seam.

general_time

ioc_role

Which role an IOC thread takes on, and therefore which scheduling band it sits at — the one place that choice is made.

json_string

The JSON string decoder a .db JSON-brace value goes through — C’s yajl.

log

Runtime logging — errlog severity surface plus the rt_* macros.

net

socket

Socket construction with pre-bind options: the one place in the workspace that opens a socket, sets the address-reuse/broadcast options a protocol needs, and only then binds or connects it.

stdlib

The numeric core of C’s strtod for C99 hex floats, shared by every strtod port in the workspace (calc::engine::strtod, the CALC literal scanner, and epics-ca-rs’s estdlib, the env-knob parser).

supervise

Auto-restart supervisor — sliding-window NRESTARTS pattern.

sync

task

time

version

The EPICS Base release this crate ports — the Rust epicsVersion.h.

worker_pool

A bounded set of persistent threads that a connection borrows rather than creates, closing the server-side per-connection thread leak.

Macros

select

Waits on multiple concurrent branches, returning when the first branch completes, cancelling the remaining branches.