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Shared Memory Segment

Source: R/segment.R
segment.Rd

Low-level shared memory segment operations for cross-process data sharing. These functions provide the foundation for the higher-level share() and buffer() APIs.

Details

Segments can be backed by:

  • "shm": POSIX shared memory (Linux/macOS) or named file mapping (Windows). Faster but may have size limitations.

  • "mmap": File-backed memory mapping. Works on all platforms and supports larger sizes.

  • "auto": Let the system choose the best option.

All segments are created with secure permissions (0600 on Unix) and are automatically cleaned up when the R object is garbage collected.