zerodds-transport-shm

Layer 2 — Wire (POSIX SHM). Cross-process shared-memory transport.

Cross-process shared-memory transport via POSIX shm_open + mmap. Lock-free SPSC ring buffer per (owner, consumer) pair. Crash recovery via a predictable os_id + shm_unlink.

Spec anchors

  • POSIX shm_open / mmap — same-host IPC for multi-process DDS applications.

Quick start

Writer allocates a shared segment, reader (another process) joins it — a lock-free SPSC ring buffer per pair:

use zerodds_transport_shm::posix::{PosixShmTransport, ShmConfig};

// Writer allocates the segment …
let owner = PosixShmTransport::open_owner(local_id, peer_id, ShmConfig::default())?;

// … reader joins the same (local_id, peer_id) segment
let reader = PosixShmTransport::open_consumer(local_id, peer_id, ShmConfig::default())?;

Modules

  • posix — PosixShmTransport (open_owner / open_consumer) + ShmConfig over POSIX shm_open + mmap, with predictable os_id + shm_unlink crash recovery.

Coverage & tests

Coverage ledger: zerodds-shm-transport-1.0 (segment layout + SPSC ring buffer + crash recovery). 18 tests (17 lib + 1 cross-process); run cargo test -p zerodds-transport-shm.

Stability

1.0.0-rc.3. 18 tests green (17 lib + 1 cross-process integration).

zerodds-transport-shm

Layer 2 — Wire (POSIX SHM). Cross-Process Shared-Memory-Transport.

Cross-Process Shared-Memory-Transport via POSIX shm_open + mmap. Lock-free SpSc-Ringbuffer pro (owner, consumer)-Paar. Crash-Recovery via predictable os_id + shm_unlink.

Spec-Anker

  • POSIX shm_open / mmap — Same-Host-IPC für Multi-Process-DDS-Anwendungen.

Quick Start

Writer alloziert ein Shared-Segment, Reader (anderer Prozess) joint — ein Lock-free-SpSc-Ringbuffer pro Paar:

use zerodds_transport_shm::posix::{PosixShmTransport, ShmConfig};

// Writer allocates the segment …
let owner = PosixShmTransport::open_owner(local_id, peer_id, ShmConfig::default())?;

// … reader joins the same (local_id, peer_id) segment
let reader = PosixShmTransport::open_consumer(local_id, peer_id, ShmConfig::default())?;

Module

  • posix — PosixShmTransport (open_owner / open_consumer) + ShmConfig über POSIX shm_open + mmap, mit predictable os_id + shm_unlink-Crash-Recovery.

Coverage & Tests

Coverage-Ledger: zerodds-shm-transport-1.0 (Segment-Layout + SpSc-Ringbuffer + Crash-Recovery). 18 Tests (17 lib + 1 Cross-Process); cargo test -p zerodds-transport-shm.

Stabilität

1.0.0-rc.3. 18 Tests grün (17 lib + 1 Cross-Process-Integration).