//! running properly, and (2) either can or should be run in the background. See docs for
//! [`BackgroundProcessor`] for more details on the nitty-gritty.
-use std::str::FromStr;
-use std::ffi::c_void;
+use alloc::str::FromStr;
+use core::ffi::c_void;
+use core::convert::Infallible;
use bitcoin::hashes::Hash;
use crate::c_types::*;
+#[cfg(feature="no-std")]
+use alloc::{vec::Vec, boxed::Box};
use lightning_background_processor::BackgroundProcessor as nativeBackgroundProcessorImport;
-type nativeBackgroundProcessor = nativeBackgroundProcessorImport;
+pub(crate) type nativeBackgroundProcessor = nativeBackgroundProcessorImport;
-/// BackgroundProcessor takes care of tasks that (1) need to happen periodically to keep
+/// `BackgroundProcessor` takes care of tasks that (1) need to happen periodically to keep
/// Rust-Lightning running properly, and (2) either can or should be run in the background. Its
/// responsibilities are:
-/// * Monitoring whether the ChannelManager needs to be re-persisted to disk, and if so,
+/// * Processing [`Event`]s with a user-provided [`EventHandler`].
+/// * Monitoring whether the [`ChannelManager`] needs to be re-persisted to disk, and if so,
/// writing it to disk/backups by invoking the callback given to it at startup.
-/// ChannelManager persistence should be done in the background.
-/// * Calling `ChannelManager::timer_tick_occurred()` and
-/// `PeerManager::timer_tick_occurred()` every minute (can be done in the
-/// background).
-///
-/// Note that if ChannelManager persistence fails and the persisted manager becomes out-of-date,
-/// then there is a risk of channels force-closing on startup when the manager realizes it's
-/// outdated. However, as long as `ChannelMonitor` backups are sound, no funds besides those used
-/// for unilateral chain closure fees are at risk.
+/// [`ChannelManager`] persistence should be done in the background.
+/// * Calling [`ChannelManager::timer_tick_occurred`] and [`PeerManager::timer_tick_occurred`]
+/// at the appropriate intervals.
+/// * Calling [`NetworkGraph::remove_stale_channels`] (if a [`NetGraphMsgHandler`] is provided to
+/// [`BackgroundProcessor::start`]).
+///
+/// It will also call [`PeerManager::process_events`] periodically though this shouldn't be relied
+/// upon as doing so may result in high latency.
+///
+/// # Note
+///
+/// If [`ChannelManager`] persistence fails and the persisted manager becomes out-of-date, then
+/// there is a risk of channels force-closing on startup when the manager realizes it's outdated.
+/// However, as long as [`ChannelMonitor`] backups are sound, no funds besides those used for
+/// unilateral chain closure fees are at risk.
+///
+/// [`ChannelMonitor`]: lightning::chain::channelmonitor::ChannelMonitor
+/// [`Event`]: lightning::util::events::Event
+///BackgroundProcessor will immediately stop on drop. It should be stored until shutdown.
#[must_use]
#[repr(C)]
pub struct BackgroundProcessor {
impl Drop for BackgroundProcessor {
fn drop(&mut self) {
if self.is_owned && !<*mut nativeBackgroundProcessor>::is_null(self.inner) {
- let _ = unsafe { Box::from_raw(self.inner) };
+ let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
}
}
}
pub extern "C" fn BackgroundProcessor_free(this_obj: BackgroundProcessor) { }
#[allow(unused)]
/// Used only if an object of this type is returned as a trait impl by a method
-extern "C" fn BackgroundProcessor_free_void(this_ptr: *mut c_void) {
+pub(crate) extern "C" fn BackgroundProcessor_free_void(this_ptr: *mut c_void) {
unsafe { let _ = Box::from_raw(this_ptr as *mut nativeBackgroundProcessor); }
}
#[allow(unused)]
-/// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
impl BackgroundProcessor {
+ pub(crate) fn get_native_ref(&self) -> &'static nativeBackgroundProcessor {
+ unsafe { &*ObjOps::untweak_ptr(self.inner) }
+ }
+ pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeBackgroundProcessor {
+ unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
+ }
+ /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
pub(crate) fn take_inner(mut self) -> *mut nativeBackgroundProcessor {
assert!(self.is_owned);
- let ret = self.inner;
- self.inner = std::ptr::null_mut();
+ let ret = ObjOps::untweak_ptr(self.inner);
+ self.inner = core::ptr::null_mut();
ret
}
}
}
unsafe impl Send for ChannelManagerPersister {}
unsafe impl Sync for ChannelManagerPersister {}
+#[no_mangle]
+pub(crate) extern "C" fn ChannelManagerPersister_clone_fields(orig: &ChannelManagerPersister) -> ChannelManagerPersister {
+ ChannelManagerPersister {
+ this_arg: orig.this_arg,
+ persist_manager: Clone::clone(&orig.persist_manager),
+ free: Clone::clone(&orig.free),
+ }
+}
use lightning_background_processor::ChannelManagerPersister as rustChannelManagerPersister;
impl rustChannelManagerPersister<crate::lightning::chain::keysinterface::Sign, crate::lightning::chain::Watch, crate::lightning::chain::chaininterface::BroadcasterInterface, crate::lightning::chain::keysinterface::KeysInterface, crate::lightning::chain::chaininterface::FeeEstimator, crate::lightning::util::logger::Logger> for ChannelManagerPersister {
fn persist_manager(&self, mut channel_manager: &lightning::ln::channelmanager::ChannelManager<crate::lightning::chain::keysinterface::Sign, crate::lightning::chain::Watch, crate::lightning::chain::chaininterface::BroadcasterInterface, crate::lightning::chain::keysinterface::KeysInterface, crate::lightning::chain::chaininterface::FeeEstimator, crate::lightning::util::logger::Logger>) -> Result<(), std::io::Error> {
- let mut ret = (self.persist_manager)(self.this_arg, &crate::lightning::ln::channelmanager::ChannelManager { inner: unsafe { (channel_manager as *const _) as *mut _ }, is_owned: false });
+ let mut ret = (self.persist_manager)(self.this_arg, &crate::lightning::ln::channelmanager::ChannelManager { inner: unsafe { ObjOps::nonnull_ptr_to_inner((channel_manager as *const lightning::ln::channelmanager::ChannelManager<_, _, _, _, _, _, >) as *mut _) }, is_owned: false });
let mut local_ret = match ret.result_ok { true => Ok( { () /*(*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.result)) })*/ }), false => Err( { (*unsafe { Box::from_raw(<*mut _>::take_ptr(&mut ret.contents.err)) }).to_rust() })};
local_ret
}
// We're essentially a pointer already, or at least a set of pointers, so allow us to be used
// directly as a Deref trait in higher-level structs:
-impl std::ops::Deref for ChannelManagerPersister {
+impl core::ops::Deref for ChannelManagerPersister {
type Target = Self;
fn deref(&self) -> &Self {
self
}
}
}
-/// Start a background thread that takes care of responsibilities enumerated in the top-level
-/// documentation.
+/// Start a background thread that takes care of responsibilities enumerated in the [top-level
+/// documentation].
///
-/// If `persist_manager` returns an error, then this thread will return said error (and
-/// `start()` will need to be called again to restart the `BackgroundProcessor`). Users should
-/// wait on [`thread_handle`]'s `join()` method to be able to tell if and when an error is
-/// returned, or implement `persist_manager` such that an error is never returned to the
-/// `BackgroundProcessor`
+/// The thread runs indefinitely unless the object is dropped, [`stop`] is called, or
+/// `persist_manager` returns an error. In case of an error, the error is retrieved by calling
+/// either [`join`] or [`stop`].
+///
+/// # Data Persistence
///
/// `persist_manager` is responsible for writing out the [`ChannelManager`] to disk, and/or
/// uploading to one or more backup services. See [`ChannelManager::write`] for writing out a
/// [`ChannelManager`]. See [`FilesystemPersister::persist_manager`] for Rust-Lightning's
/// provided implementation.
///
-/// [`thread_handle`]: BackgroundProcessor::thread_handle
+/// Typically, users should either implement [`ChannelManagerPersister`] to never return an
+/// error or call [`join`] and handle any error that may arise. For the latter case,
+/// `BackgroundProcessor` must be restarted by calling `start` again after handling the error.
+///
+/// # Event Handling
+///
+/// `event_handler` is responsible for handling events that users should be notified of (e.g.,
+/// payment failed). [`BackgroundProcessor`] may decorate the given [`EventHandler`] with common
+/// functionality implemented by other handlers.
+/// * [`NetGraphMsgHandler`] if given will update the [`NetworkGraph`] based on payment failures.
+///
+/// [top-level documentation]: BackgroundProcessor
+/// [`join`]: Self::join
+/// [`stop`]: Self::stop
/// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
/// [`ChannelManager::write`]: lightning::ln::channelmanager::ChannelManager#impl-Writeable
/// [`FilesystemPersister::persist_manager`]: lightning_persister::FilesystemPersister::persist_manager
+/// [`NetworkGraph`]: lightning::routing::network_graph::NetworkGraph
+///
+/// Note that net_graph_msg_handler (or a relevant inner pointer) may be NULL or all-0s to represent None
#[must_use]
#[no_mangle]
-pub extern "C" fn BackgroundProcessor_start(mut persister: crate::lightning_background_processor::ChannelManagerPersister, mut event_handler: crate::lightning::util::events::EventHandler, chain_monitor: &crate::lightning::chain::chainmonitor::ChainMonitor, channel_manager: &crate::lightning::ln::channelmanager::ChannelManager, peer_manager: &crate::lightning::ln::peer_handler::PeerManager, mut logger: crate::lightning::util::logger::Logger) -> BackgroundProcessor {
- let mut ret = lightning_background_processor::BackgroundProcessor::start(persister, event_handler, unsafe { &*chain_monitor.inner }, unsafe { &*channel_manager.inner }, unsafe { &*peer_manager.inner }, logger);
- BackgroundProcessor { inner: Box::into_raw(Box::new(ret)), is_owned: true }
+pub extern "C" fn BackgroundProcessor_start(mut persister: crate::lightning_background_processor::ChannelManagerPersister, mut event_handler: crate::lightning::util::events::EventHandler, chain_monitor: &crate::lightning::chain::chainmonitor::ChainMonitor, channel_manager: &crate::lightning::ln::channelmanager::ChannelManager, mut net_graph_msg_handler: crate::lightning::routing::network_graph::NetGraphMsgHandler, peer_manager: &crate::lightning::ln::peer_handler::PeerManager, mut logger: crate::lightning::util::logger::Logger) -> BackgroundProcessor {
+ let mut local_net_graph_msg_handler = if net_graph_msg_handler.inner.is_null() { None } else { Some( { net_graph_msg_handler.get_native_ref() }) };
+ let mut ret = lightning_background_processor::BackgroundProcessor::start(persister, event_handler, chain_monitor.get_native_ref(), channel_manager.get_native_ref(), local_net_graph_msg_handler, peer_manager.get_native_ref(), logger);
+ BackgroundProcessor { inner: ObjOps::heap_alloc(ret), is_owned: true }
}
-/// Stop `BackgroundProcessor`'s thread.
+/// Join `BackgroundProcessor`'s thread, returning any error that occurred while persisting
+/// [`ChannelManager`].
+///
+/// # Panics
+///
+/// This function panics if the background thread has panicked such as while persisting or
+/// handling events.
+///
+/// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
+#[must_use]
+#[no_mangle]
+pub extern "C" fn BackgroundProcessor_join(mut this_arg: BackgroundProcessor) -> crate::c_types::derived::CResult_NoneErrorZ {
+ let mut ret = (*unsafe { Box::from_raw(this_arg.take_inner()) }).join();
+ let mut local_ret = match ret { Ok(mut o) => crate::c_types::CResultTempl::ok( { () /*o*/ }).into(), Err(mut e) => crate::c_types::CResultTempl::err( { crate::c_types::IOError::from_rust(e) }).into() };
+ local_ret
+}
+
+/// Stop `BackgroundProcessor`'s thread, returning any error that occurred while persisting
+/// [`ChannelManager`].
+///
+/// # Panics
+///
+/// This function panics if the background thread has panicked such as while persisting or
+/// handling events.
+///
+/// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
#[must_use]
#[no_mangle]
pub extern "C" fn BackgroundProcessor_stop(mut this_arg: BackgroundProcessor) -> crate::c_types::derived::CResult_NoneErrorZ {
projects / ldk-c-bindings / blobdiff