0Pricing
Zig Academy · Lesson

extern struct and ABI Layout

Match C struct memory layout.

Talking to C

When Zig calls into C code, both sides must agree on memory layout. That shared contract is the ABI.

Plain Structs Are Not Guaranteed

A regular struct lets Zig pick field order and padding freely, so its layout may not match what a C library expects.

All lessons in this course

  1. packed struct for Exact Layout
  2. Arbitrary-Width Integers like u3
  3. Bit Fields and Flags
  4. extern struct and ABI Layout
← Back to Zig Academy