Struct ScheduleGraph

pub struct ScheduleGraph { /* private fields */ }

Metadata for a Schedule.

The order isn’t optimized; calling ScheduleGraph::build_schedule will return a SystemSchedule where the order is optimized for execution.

Implementations

impl ScheduleGraph

pub fn new() -> Self

Creates an empty ScheduleGraph with default settings.

pub fn get_system_at( &self, id: NodeId, ) -> Option<&dyn System<In = (), Out = ()>>

Returns the system at the given NodeId, if it exists.

pub fn system_at(&self, id: NodeId) -> &dyn System<In = (), Out = ()>

Returns the system at the given NodeId.

Panics if it doesn’t exist.

pub fn get_set_at(&self, id: NodeId) -> Option<&dyn SystemSet>

Returns the set at the given NodeId, if it exists.

pub fn set_at(&self, id: NodeId) -> &dyn SystemSet

Returns the set at the given NodeId.

Panics if it doesn’t exist.

pub fn systems( &self, ) -> impl Iterator<Item = (NodeId, &dyn System<In = (), Out = ()>, &[BoxedCondition])>

Returns an iterator over all systems in this schedule, along with the conditions for each system.

pub fn system_sets( &self, ) -> impl Iterator<Item = (NodeId, &dyn SystemSet, &[BoxedCondition])>

Returns an iterator over all system sets in this schedule, along with the conditions for each system set.

pub fn hierarchy(&self) -> &Dag

Returns the Dag of the hierarchy.

The hierarchy is a directed acyclic graph of the systems and sets, where an edge denotes that a system or set is the child of another set.

pub fn dependency(&self) -> &Dag

Returns the Dag of the dependencies in the schedule.

Nodes in this graph are systems and sets, and edges denote that a system or set has to run before another system or set.

pub fn conflicting_systems(&self) -> &[(NodeId, NodeId, Vec<ComponentId>)]

Returns the list of systems that conflict with each other, i.e. have ambiguities in their access.

If the Vec<ComponentId> is empty, the systems conflict on World access. Must be called after ScheduleGraph::build_schedule to be non-empty.

pub fn initialize(&mut self, world: &mut World)

Initializes any newly-added systems and conditions by calling System::initialize

pub fn build_schedule( &mut self, components: &Components, schedule_label: InternedScheduleLabel, ignored_ambiguities: &BTreeSet<ComponentId>, ) -> Result<SystemSchedule, ScheduleBuildError>

Build a SystemSchedule optimized for scheduler access from the ScheduleGraph.

This method also

• checks for dependency or hierarchy cycles
• checks for system access conflicts and reports ambiguities

impl ScheduleGraph

pub fn conflicts_to_string<'a>( &'a self, ambiguities: &'a [(NodeId, NodeId, Vec<ComponentId>)], components: &'a Components, ) -> impl Iterator<Item = (String, String, Vec<&str>)> + 'a

convert conflicts to human readable format

Trait Implementations

impl Default for ScheduleGraph

fn default() -> ScheduleGraph

Returns the “default value” for a type.