zig-wasm-example

README

Zig allocation example

This example shows how to pass strings in and out of a Wasm function defined in Zig, built with zig build.

Ex.

$ go run greet.go wazero
wasm >> Hello, wazero!
go >> Hello, wazero!

Under the covers, main.zig does a few things of interest:

• Uses @ptrToInt to change a Zig pointer to a numeric type.
• Uses @intToPtr to build back a string from a pointer, len pair.
• Relies on Zig not having garbage collector.

Zig code exports "malloc" and "free", which we use for that purpose.