Nim C Interop

Use the importc pragma to declare C functions in Nim. The pragma tells Nim to link to the C function by name, enabling direct calls with type-safe bindings. This creates zero-overhead interop between Nim and C libraries.

Yes, use the exportc pragma to mark Nim procedures for C interop. Exportc generates C-compatible function signatures that C code can call directly, maintaining ABI compatibility across language boundaries.

Create Nim wrapper types and procedures that map C types to Nim equivalents using importc pragmas. Define type-safe interfaces that hide C implementation details, then call wrapped C functions through the Nim layer for safer, more idiomatic code.

Use pragmas and type annotations to control memory layout, ensuring Nim struct definitions match C struct ABI. Attributes like packed and alignment guarantee field offsets align, preventing memory corruption when passing structs across the FFI boundary.

Yes, callbacks require careful FFI patterns. Define callback types compatible with C function pointers, use proper calling conventions, and manage lifetime to prevent dangling pointers when C code invokes Nim callbacks.