lib/ecs: implement ReadWriteResource
parent
517db87c62
commit
d8062733e9
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@ -7,7 +7,12 @@ pub mod system;
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pub mod world;
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pub use component::Component as Component;
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pub use component::Resource as Resource;
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pub use world::World as World;
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pub use world::ReadData as ReadData;
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pub use world::ReadWriteData as ReadWriteData;
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pub use world::ReadResource as ReadResource;
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pub use world::ReadWriteResource as ReadWriteResource;
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pub use system::System as System;
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pub use system::Join as Join;
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pub use system::Processor as Processor;
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@ -1,6 +1,6 @@
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use std::cell::{Cell, UnsafeCell};
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use std::collections::BTreeMap;
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use std::ops::Deref;
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use std::ops::{Deref, DerefMut};
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use crate::component;
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use crate::borrow;
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@ -45,9 +45,35 @@ impl ResourceMap {
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None => Err(AccessError::concurrent()),
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Some(b2) => {
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let val = val.as_ref();
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let val = unsafe { & *(val as *const (dyn component::Resource) as *const T) };
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let val = & *(val as *const (dyn component::Resource) as *const T);
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drop(b);
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Ok(ResourceRef { val, borrow: b2 })
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Ok(ResourceRef { val, borrow: Some(b2) })
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},
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}
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},
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None => Err(AccessError("resource absent from world".to_string())),
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}
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}
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}
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}
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}
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pub fn get_mut<'a, T: component::Resource>(&'a self) -> Result<ResourceRefMut<'a, T>, AccessError> {
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match borrow::RefMut::new(&self.borrow) {
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None => Err(AccessError::concurrent()),
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Some(b) => {
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let map = self.value.get();
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unsafe {
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match (*map).get_mut(&component::resource_id::<T>()) {
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Some(entry) => {
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let val = &mut entry.resource;
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match borrow::RefMut::new(&entry.borrow) {
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None => Err(AccessError::concurrent()),
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Some(b2) => {
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let val = val.as_mut();
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let val = &mut *(val as *mut (dyn component::Resource) as *mut T);
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drop(b);
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Ok(ResourceRefMut { val, borrow: Some(b2) })
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},
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}
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},
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@ -92,7 +118,7 @@ impl ResourceMap {
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pub struct ResourceRef<'a, T: component::Resource> {
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val: *const T,
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borrow: borrow::Ref<'a>,
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borrow: Option<borrow::Ref<'a>>,
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}
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impl<'a, T: component::Resource> Deref for ResourceRef<'a, T> {
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@ -104,3 +130,37 @@ impl<'a, T: component::Resource> Deref for ResourceRef<'a, T> {
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}
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}
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}
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impl <'a, T: component::Resource> Drop for ResourceRef<'a, T> {
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fn drop(&mut self) {
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self.borrow = None;
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}
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}
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pub struct ResourceRefMut<'a, T: component::Resource> {
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val: *mut T,
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borrow: Option<borrow::RefMut<'a>>,
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}
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impl <'a, T: component::Resource> Drop for ResourceRefMut<'a, T> {
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fn drop(&mut self) {
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self.borrow = None;
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}
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}
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impl <'a, T: component::Resource> Deref for ResourceRefMut<'a, T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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unsafe {
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&(*self.val)
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}
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}
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}
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impl <'a, T: component::Resource> DerefMut for ResourceRefMut<'a, T> {
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fn deref_mut(&mut self) -> &mut Self::Target {
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unsafe {
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&mut(*self.val)
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}
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}
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}
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@ -6,7 +6,7 @@ use crate::{
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world::{
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ReadData, ReadDataIter,
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ReadWriteData, ReadWriteDataIter,
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ReadResource,
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ReadResource, ReadWriteResource,
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World,
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}
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};
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@ -75,6 +75,12 @@ impl<'a, T: component::Resource> Access<'a> for ReadResource<'a, T> {
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}
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}
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impl<'a, T: component::Resource> Access<'a> for ReadWriteResource<'a, T> {
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fn fetch(world: &'a World) -> Self {
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world.resource_mut()
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}
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}
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impl <'a,
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T: Access<'a>,
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U: Access<'a>,
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@ -101,12 +107,34 @@ impl <'a,
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}
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}
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impl <'a,
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T: Access<'a>,
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U: Access<'a>,
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V: Access<'a>,
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W: Access<'a>,
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> Access<'a> for (T, U, V, W) {
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fn fetch(world: &'a World) -> Self {
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(
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T::fetch(world),
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U::fetch(world),
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V::fetch(world),
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W::fetch(world),
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)
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}
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}
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pub struct Processor<'a> {
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world: &'a World,
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runners: Vec<Box<dyn WorldRunner<'a>>>,
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}
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impl<'a> Processor<'a> {
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pub fn new(world: &'a World) -> Self {
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Self {
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world,
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runners: Vec::new(),
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}
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}
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pub fn add_system<T: System<'a> + 'static>(&mut self, system: T) {
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self.runners.push(Box::new(system));
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}
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@ -172,13 +200,19 @@ mod test {
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component::Resource,
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system,
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system::Join,
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world::{ReadData, ReadWriteData, ReadResource, World},
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world::{ReadData, ReadWriteData, ReadResource, ReadWriteResource, World},
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};
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#[derive(Clone,Debug,Default)]
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struct Delta(f32);
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impl Resource for Delta {}
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#[derive(Clone,Debug)]
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struct PhysicsStatus {
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object_count: u64,
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}
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impl Resource for PhysicsStatus {}
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#[derive(Clone,Debug)]
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struct Position {
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x: f32,
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@ -199,15 +233,19 @@ mod test {
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impl<'a> system::System<'a> for Physics {
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type SystemData = ( ReadWriteData<'a, Position>
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, ReadData<'a, Velocity>
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, ReadResource<'a, Delta>);
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, ReadResource<'a, Delta>
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, ReadWriteResource<'a, PhysicsStatus>);
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fn run(&mut self, (pos, vel, delta): Self::SystemData) {
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fn run(&mut self, (pos, vel, delta, status): Self::SystemData) {
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let d = delta.get();
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let mut count = 0u64;
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for (mut p, v) in (pos, vel).join_all() {
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p.x += v.x * d.0;
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p.y += v.y * d.0;
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p.z += v.z * d.0;
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count += 1;
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}
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status.get().object_count = count;
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}
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}
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@ -217,6 +255,7 @@ mod test {
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world.new_entity().with(Velocity { x: 0.0, y: 0.0, z: 1.0 }).with(Position { x: 1.0, y: 2.0, z: 3.0 }).build();
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world.new_entity().with(Velocity { x: 0.0, y: 0.0, z: 2.0 }).with(Position { x: 4.0, y: 5.0, z: 6.0 }).build();
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world.set_resource(Delta(1.0));
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world.set_resource(PhysicsStatus { object_count: 0u64 });
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let mut p = system::Processor {
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world: &world,
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@ -231,5 +270,6 @@ mod test {
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world.set_resource(Delta(2.0));
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p.run();
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assert_eq!(vec![6.0, 12.0], positions.iter().map(|(_, el)| el.z).collect::<Vec<f32>>());
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assert_eq!(2, world.resource::<PhysicsStatus>().get().object_count);
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}
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}
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@ -1,7 +1,6 @@
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use std::collections::BTreeMap;
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use std::marker::PhantomData;
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use std::iter::Iterator;
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use std::cell::{Ref, RefMut, RefCell};
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use crate::componentmap::{
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ComponentMap,
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@ -11,6 +10,7 @@ use crate::componentmap::{
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use crate::resourcemap::{
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ResourceMap,
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ResourceRef,
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ResourceRefMut,
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};
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use crate::entity;
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use crate::component;
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@ -98,7 +98,18 @@ pub struct ReadResource<'a, T: component::Resource> {
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impl<'a, T: component::Resource> ReadResource<'a, T> {
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pub fn get(&self) -> ResourceRef<'a, T> {
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self.world.resources.get::<'a, T>().unwrap()
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self.world.resources.get::<T>().unwrap()
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}
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}
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pub struct ReadWriteResource<'a, T: component::Resource> {
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world: &'a World,
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phantom: PhantomData<&'a T>,
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}
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impl<'a, T: component::Resource> ReadWriteResource<'a, T> {
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pub fn get(&self) -> ResourceRefMut<'a, T> {
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self.world.resources.get_mut::<T>().unwrap()
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}
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}
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@ -154,6 +165,13 @@ impl World {
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}
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}
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pub fn resource_mut<'a, T: component::Resource>(&'a self) -> ReadWriteResource<'a, T> {
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ReadWriteResource {
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world: self,
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phantom: PhantomData,
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}
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}
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pub fn set_resource<T: component::Resource>(&self, r: T) {
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self.resources.set(r).unwrap();
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}
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