Module process 

Process-level setup for latency-sensitive servers: signal handling and memory locking. Generic OS plumbing — no application coupling.

Functions

install_shutdown_handler

Install SIGINT/SIGTERM handlers that flip shutdown on first signal and force-exit on the second. The caller must keep the Arc alive for the program’s lifetime — we publish its pointer to a signal-safe static so the handler can reach the flag.

try_lock_memory

Pin engine pages into RAM with mlockall, lock-on-fault.