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Cobhan FFI is a system for enabling shared code to be written in Rust and consumed from all major languages/platforms in a safe and effective way.

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cobhan-rust - FFI Data Interface

Cobhan FFI is a system for enabling shared code to be written in Rust and consumed from all major languages/platforms in a safe and effective way, using easy helper functions to manage any unsafe data marshaling.

Types

  • Supported types
    • i32 - 32bit signed integer
    • i64 - 64bit signed integer
    • f64 - double precision 64bit IEEE 754 floating point
    • Cobhan buffer - length delimited 8bit buffer (no null delimiters)
      • utf-8 encoded string
      • JSON
      • binary data
  • Cobhan buffer details
    • Callers provide the output buffer allocation and capacity
    • Called functions can transparently return larger values via temporary files
    • Modern tmpfs is entirely memory backed
  • Return values
    • Functions that return scalar values can return the value directly
      • Functions can use special case and return maximum positive or maximum negative or zero values to represent error or overflow conditions
      • Functions can allow scalar values to wrap
      • Functions should document their overflow / underflow behavior

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Cobhan FFI is a system for enabling shared code to be written in Rust and consumed from all major languages/platforms in a safe and effective way.

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