NewRegistry creates a new shm registry.

CtxDeviceID is a Context.Value key for kernel.Kernel.sysVShmDevID, which this package cannot refer to due to dependency cycles.

enableLogging indicates whether reference-related events should be logged (with stack traces).

obj is used to customize logging.

AttachOpts describes various flags passed to shmat(2).

Registry tracks all shared memory segments in an IPC namespace.

Shm represents a single shared memory segment.

Refs implements refs.RefCounter.