Struct scratchstack_wrapper_aws_c_io::aws_host_resolver_vtable

#[repr(C)]
pub struct aws_host_resolver_vtable {
    pub destroy: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver)>,
    pub resolve_host: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, host_name: *const aws_string, res: aws_on_host_resolved_result_fn, config: *mut aws_host_resolution_config, user_data: *mut c_void) -> c_int>,
    pub record_connection_failure: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, address: *mut aws_host_address) -> c_int>,
    pub purge_cache: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver) -> c_int>,
    pub get_host_address_count: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, host_name: *const aws_string, flags: u32) -> usize>,
    pub add_host_listener: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, options: *const aws_host_listener_options) -> *mut aws_host_listener>,
    pub remove_host_listener: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, listener: *mut aws_host_listener) -> c_int>,
}

should you absolutely disdain the default implementation, feel free to implement your own.

Fields

destroy: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver)>

clean up everything you allocated, but not resolver itself.

resolve_host: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, host_name: *const aws_string, res: aws_on_host_resolved_result_fn, config: *mut aws_host_resolution_config, user_data: *mut c_void) -> c_int>

resolve the host by host_name, the user owns host_name, so it needs to be copied if you persist it, invoke res with the result. This function should never block.

record_connection_failure: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, address: *mut aws_host_address) -> c_int>

gives your implementation a hint that an address has some failed connections occuring. Do whatever you want (or nothing) about it.

purge_cache: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver) -> c_int>

wipe out anything you have cached.

get_host_address_count: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, host_name: *const aws_string, flags: u32) -> usize>

get number of addresses for a given host.

add_host_listener: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, options: *const aws_host_listener_options) -> *mut aws_host_listener>

creates and adds a listener to the host resolver.

remove_host_listener: Option<unsafe extern "C" fn(resolver: *mut aws_host_resolver, listener: *mut aws_host_listener) -> c_int>

removes a host listener from the host resolver and frees it.

Trait Implementations

impl Clone for aws_host_resolver_vtable

fn clone(&self) -> aws_host_resolver_vtable

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for aws_host_resolver_vtable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for aws_host_resolver_vtable

fn default() -> aws_host_resolver_vtable

Returns the “default value” for a type.

impl PartialEq<aws_host_resolver_vtable> for aws_host_resolver_vtable

fn eq(&self, other: &aws_host_resolver_vtable) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for aws_host_resolver_vtable

impl Eq for aws_host_resolver_vtable

impl StructuralEq for aws_host_resolver_vtable

impl StructuralPartialEq for aws_host_resolver_vtable