an class="binding-type">cfunction</span> <span class="binding-type"><a href="https://github.com/janet-lang/janet/blob/83e8aab/src/core/ffi.c#L1729">source</a></span> <pre class="binding-text">(ffi/trampoline cc)

Get a native function pointer that can be used as a callback and passed to C libraries. This callback trampoline has the signature `void trampoline(void \*ctx, void \*userdata)` in the given calling convention. This is the only function signature supported. It is up to the programmer to ensure that