Function call_with_sockaddr

src/net/addr.rs:109–116

Helper for implementing `SocketAddrArg::with_sockaddr`. # Safety This calls `f` with a pointer to an object it has a reference to, with the and the length of that object, so they'll be valid for the duration of the call.

(
    addr: &A,
    f: impl FnOnce(*const SocketAddrOpaque, SocketAddrLen) -> R,
)

/// and the length of that object, so they'll be valid for the duration of the
/// call.
pub(crate) unsafe fn call_with_sockaddr<A, R>(
    addr: &A,
    f: impl FnOnce(*const SocketAddrOpaque, SocketAddrLen) -> R,
) -> R {
    let ptr = as_ptr(addr).cast();
    let len = size_of::<A>() as SocketAddrLen;
    f(ptr, len)
}

// SAFETY: This just forwards to the inner `SocketAddrArg` implementations.
unsafe impl SocketAddrArg for SocketAddr {