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cgo command - cmd cgo - Go Packages Go structs cannot embed fields with C types Go code cannot refer to zero-sized fields that occur at the end of non-empty C structs To get the address of such a field (which is the only operation you can do with a zero-sized field) you must take the address of the struct and add the size of the struct
Best Practices in cgo Part I: Structs | Ryan Cole - GitHub Pages One of the libraries that makes Go so powerful is cgo, a set of bindings for calling C code from Go This is called a Foreign Function Interface (or FFI) and despite the versatility it adds to Go, it can be a tricky library to use To help ease new users through some of the trickier aspects of cgo, here are some general best practices Structs Handing C structs is one of the most common issues
CGO usage for struct transfer - Getting Help - Go Forum That looks like a null terminated string, of “MCU” So you probably want to replace fmt Println(“chip_type”, chip_info chip_name) with fmt Println(“chip_type”, C GoString( chip_info chip_name[0]))
CGo - Referencing C library in Go - Blog Go type to C type: The C string is allocated in the C heap using malloc It is the caller's responsibility to arrange for it to be freed, such as by calling C free (be sure to include stdlib h) func C CString(string) *C char Go []byte slice to C array The C array is allocated in the C heap using malloc
cmd cgo: provide a way to pass a Go string directly to C code wasteful to create an intermediate copy with C GoString rather than just using the original Go string as source for the copy Similarly, for API calls that can deal with constant string data plus a length, it'd be nice to be able to do so without a copy If there are existing ways to handle this kind of thing, would it be possible to document them?
- The Go Programming Language 196 address of the struct and add the size of the struct 197 198 Cgo translates C types into equivalent unexported Go types 199 Because the translations are unexported, a Go package should not 200 expose C types in its exported API: a C type used in one Go package 201 is different from the same C type used in another