Function nix_create_external_value 

pub unsafe extern "C" fn nix_create_external_value(
    context: *mut nix_c_context,
    desc: *mut NixCExternalValueDesc,
    v: *mut c_void,
) -> *mut ExternalValue

Create an external value, that can be given to nix_init_external Call nix_gc_decref() when you’re done with the pointer.

Arguments

• context [out] - Optional, stores error information
• desc [in] - a NixCExternalValueDesc, you should keep this alive as long as the ExternalValue lives
• v [in] - the value to store

Returns

external value, owned by the garbage collector

See also

nix_init_external