hibana 0.8.0

Const-projected Affine Multiparty Session Types for choreography-first Rust protocols
Documentation 
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#[cfg(test)]
use super::{AssocTable, GenTable, PolicyTable, StateSnapshotTable};
use super::{
    CapTable, Clock, EndpointResidentBudget, LabelUniverse, LoopTable, Rendezvous, ResourceScope,
    RouteTable, Transport,
};
impl<'rv, 'cfg, T: Transport, U: LabelUniverse, C: Clock, E: crate::control::cap::mint::EpochTable>
    Rendezvous<'rv, 'cfg, T, U, C, E>
where
    'cfg: 'rv,
{
    pub(crate) fn ensure_core_lane_storage_for_lane_slots(
        &mut self,
        required_lane_slots: usize,
    ) -> Option<()> {
        self.ensure_core_lane_tables_for_lane_slots(required_lane_slots)
    }

    #[cfg(test)]
    fn free_bound_core_lane_storage(&mut self) {
        if self.policies.is_bound() {
            self.free_external_persistent_sidecar_bytes(
                self.policies.storage_ptr(),
                self.policies.storage_bytes_current(),
                0,
            );
            self.policies = PolicyTable::empty();
        }
        if self.state_snapshots.is_bound() {
            self.free_external_persistent_sidecar_bytes(
                self.state_snapshots.storage_ptr(),
                self.state_snapshots.storage_bytes_current(),
                0,
            );
            self.state_snapshots = StateSnapshotTable::empty();
        }
        if self.assoc.is_bound() {
            self.free_external_persistent_sidecar_bytes(
                self.assoc.storage_ptr(),
                self.assoc.storage_bytes_current(),
                0,
            );
            self.assoc = AssocTable::empty();
        }
        if self.r#gen.is_bound() {
            self.free_external_persistent_sidecar_bytes(
                self.r#gen.storage_ptr(),
                self.r#gen.storage_bytes_current(),
                0,
            );
            self.r#gen = GenTable::empty();
        }
    }

    #[cfg(test)]
    pub(crate) unsafe fn cleanup_failed_public_init(dst: *mut Self) {
        let rv = /* SAFETY: the pointer comes from pinned owner storage and this path holds the unique mutable access for the borrow. */ unsafe { &mut *dst };
        rv.free_bound_core_lane_storage();
        /* SAFETY: initialization owns exclusive writable storage for this field and writes it exactly once before exposure. */
        unsafe {
            core::ptr::drop_in_place(core::ptr::addr_of_mut!((*dst).clock));
            core::ptr::drop_in_place(core::ptr::addr_of_mut!((*dst).transport));
        }
    }

    pub(crate) fn ensure_endpoint_resident_budget(
        &mut self,
        budget: EndpointResidentBudget,
    ) -> Result<(), ResourceScope> {
        let route_frame_slots = core::cmp::max(
            self.resident_route_frame_slots_floor(),
            budget.route_frame_slots as usize,
        );
        let route_lane_slots = core::cmp::max(
            self.resident_route_lane_slots_floor(),
            budget.route_lane_slots as usize,
        );
        let loop_slots =
            core::cmp::max(self.resident_loop_slots_floor(), budget.loop_slots as usize);
        let cap_entries = core::cmp::max(
            self.resident_cap_entries_floor(),
            budget.cap_entries as usize,
        );
        let frontier_workspace_bytes = core::cmp::max(
            self.resident_frontier_workspace_floor(),
            budget.frontier_workspace_bytes as usize,
        );
        self.ensure_frontier_workspace_capacity(frontier_workspace_bytes)
            .ok_or(ResourceScope::EndpointLease)?;
        self.ensure_route_table_capacity(route_frame_slots, route_lane_slots)
            .ok_or(ResourceScope::RouteTable)?;
        self.ensure_loop_table_capacity(loop_slots)
            .ok_or(ResourceScope::LoopTable)?;
        self.ensure_cap_table_capacity(cap_entries)
            .ok_or(ResourceScope::CapTable)?;
        Ok(())
    }

    pub(crate) fn trim_resident_headers_to_live_budget(&mut self) {
        if self.resident_route_frame_slots_floor() == 0 && self.routes.route_slots() != 0 {
            self.free_bound_persistent_region(
                self.reclaim_offset_for_payload(
                    self.routes.storage_ptr(),
                    self.routes.storage_reclaim_delta(),
                ),
                self.routes.storage_ptr(),
                self.routes.storage_bytes_current(),
            );
            self.routes = RouteTable::empty();
        }
        if self.resident_loop_slots_floor() == 0 && self.loops.loop_slots() != 0 {
            self.free_bound_persistent_region(
                self.reclaim_offset_for_payload(
                    self.loops.storage_ptr(),
                    self.loops.storage_reclaim_delta(),
                ),
                self.loops.storage_ptr(),
                self.loops.storage_bytes_current(),
            );
            self.loops = LoopTable::empty();
        }
        if self.resident_cap_entries_floor() == 0 && self.caps.capacity() != 0 {
            self.free_bound_persistent_region(
                self.reclaim_offset_for_payload(
                    self.caps.storage_ptr(),
                    self.caps.storage_reclaim_delta(),
                ),
                self.caps.storage_ptr(),
                self.caps.storage_bytes_current(),
            );
            self.caps = CapTable::empty();
        }
    }
}