1 /// Auto-generated bindings for a pre-instantiated version of a 2 /// component which implements the world `imports`. 3 /// 4 /// This structure is created through [`ImportsPre::new`] which 5 /// takes a [`InstancePre`](wasmtime::component::InstancePre) that 6 /// has been created through a [`Linker`](wasmtime::component::Linker). 7 /// 8 /// For more information see [`Imports`] as well. 9 pub struct ImportsPre<T: 'static> { 10 instance_pre: wasmtime::component::InstancePre<T>, 11 indices: ImportsIndices, 12 } 13 impl<T: 'static> Clone for ImportsPre<T> { 14 fn clone(&self) -> Self { 15 Self { 16 instance_pre: self.instance_pre.clone(), 17 indices: self.indices.clone(), 18 } 19 } 20 } 21 impl<_T: 'static> ImportsPre<_T> { 22 /// Creates a new copy of `ImportsPre` bindings which can then 23 /// be used to instantiate into a particular store. 24 /// 25 /// This method may fail if the component behind `instance_pre` 26 /// does not have the required exports. 27 pub fn new( 28 instance_pre: wasmtime::component::InstancePre<_T>, 29 ) -> wasmtime::Result<Self> { 30 let indices = ImportsIndices::new(&instance_pre)?; 31 Ok(Self { instance_pre, indices }) 32 } 33 pub fn engine(&self) -> &wasmtime::Engine { 34 self.instance_pre.engine() 35 } 36 pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> { 37 &self.instance_pre 38 } 39 /// Instantiates a new instance of [`Imports`] within the 40 /// `store` provided. 41 /// 42 /// This function will use `self` as the pre-instantiated 43 /// instance to perform instantiation. Afterwards the preloaded 44 /// indices in `self` are used to lookup all exports on the 45 /// resulting instance. 46 pub async fn instantiate_async( 47 &self, 48 mut store: impl wasmtime::AsContextMut<Data = _T>, 49 ) -> wasmtime::Result<Imports> 50 where 51 _T: Send + 'static, 52 { 53 let mut store = store.as_context_mut(); 54 let instance = self.instance_pre.instantiate_async(&mut store).await?; 55 self.indices.load(&mut store, &instance) 56 } 57 } 58 /// Auto-generated bindings for index of the exports of 59 /// `imports`. 60 /// 61 /// This is an implementation detail of [`ImportsPre`] and can 62 /// be constructed if needed as well. 63 /// 64 /// For more information see [`Imports`] as well. 65 #[derive(Clone)] 66 pub struct ImportsIndices {} 67 /// Auto-generated bindings for an instance a component which 68 /// implements the world `imports`. 69 /// 70 /// This structure can be created through a number of means 71 /// depending on your requirements and what you have on hand: 72 /// 73 /// * The most convenient way is to use 74 /// [`Imports::instantiate_async`] which only needs a 75 /// [`Store`], [`Component`], and [`Linker`]. 76 /// 77 /// * Alternatively you can create a [`ImportsPre`] ahead of 78 /// time with a [`Component`] to front-load string lookups 79 /// of exports once instead of per-instantiation. This 80 /// method then uses [`ImportsPre::instantiate_async`] to 81 /// create a [`Imports`]. 82 /// 83 /// * If you've instantiated the instance yourself already 84 /// then you can use [`Imports::new`]. 85 /// 86 /// These methods are all equivalent to one another and move 87 /// around the tradeoff of what work is performed when. 88 /// 89 /// [`Store`]: wasmtime::Store 90 /// [`Component`]: wasmtime::component::Component 91 /// [`Linker`]: wasmtime::component::Linker 92 pub struct Imports {} 93 const _: () = { 94 #[allow(unused_imports)] 95 use wasmtime::component::__internal::anyhow; 96 impl ImportsIndices { 97 /// Creates a new copy of `ImportsIndices` bindings which can then 98 /// be used to instantiate into a particular store. 99 /// 100 /// This method may fail if the component does not have the 101 /// required exports. 102 pub fn new<_T>( 103 _instance_pre: &wasmtime::component::InstancePre<_T>, 104 ) -> wasmtime::Result<Self> { 105 let _component = _instance_pre.component(); 106 let _instance_type = _instance_pre.instance_type(); 107 Ok(ImportsIndices {}) 108 } 109 /// Uses the indices stored in `self` to load an instance 110 /// of [`Imports`] from the instance provided. 111 /// 112 /// Note that at this time this method will additionally 113 /// perform type-checks of all exports. 114 pub fn load( 115 &self, 116 mut store: impl wasmtime::AsContextMut, 117 instance: &wasmtime::component::Instance, 118 ) -> wasmtime::Result<Imports> { 119 let _ = &mut store; 120 let _instance = instance; 121 Ok(Imports {}) 122 } 123 } 124 impl Imports { 125 /// Convenience wrapper around [`ImportsPre::new`] and 126 /// [`ImportsPre::instantiate_async`]. 127 pub async fn instantiate_async<_T>( 128 store: impl wasmtime::AsContextMut<Data = _T>, 129 component: &wasmtime::component::Component, 130 linker: &wasmtime::component::Linker<_T>, 131 ) -> wasmtime::Result<Imports> 132 where 133 _T: Send + 'static, 134 { 135 let pre = linker.instantiate_pre(component)?; 136 ImportsPre::new(pre)?.instantiate_async(store).await 137 } 138 /// Convenience wrapper around [`ImportsIndices::new`] and 139 /// [`ImportsIndices::load`]. 140 pub fn new( 141 mut store: impl wasmtime::AsContextMut, 142 instance: &wasmtime::component::Instance, 143 ) -> wasmtime::Result<Imports> { 144 let indices = ImportsIndices::new(&instance.instance_pre(&store))?; 145 indices.load(&mut store, instance) 146 } 147 pub fn add_to_linker<T, U>( 148 linker: &mut wasmtime::component::Linker<T>, 149 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static, 150 ) -> wasmtime::Result<()> 151 where 152 T: 'static, 153 T: Send + a::b::interface_with_live_type::Host<Data = T> 154 + a::b::interface_with_dead_type::Host, 155 U: Send + a::b::interface_with_live_type::Host<Data = T> 156 + a::b::interface_with_dead_type::Host, 157 { 158 a::b::interface_with_live_type::add_to_linker(linker, get)?; 159 a::b::interface_with_dead_type::add_to_linker(linker, get)?; 160 Ok(()) 161 } 162 } 163 }; 164 pub mod a { 165 pub mod b { 166 #[allow(clippy::all)] 167 pub mod interface_with_live_type { 168 #[allow(unused_imports)] 169 use wasmtime::component::__internal::{anyhow, Box}; 170 #[derive(wasmtime::component::ComponentType)] 171 #[derive(wasmtime::component::Lift)] 172 #[derive(wasmtime::component::Lower)] 173 #[component(record)] 174 #[derive(Clone, Copy)] 175 pub struct LiveType { 176 #[component(name = "a")] 177 pub a: u32, 178 } 179 impl core::fmt::Debug for LiveType { 180 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 181 f.debug_struct("LiveType").field("a", &self.a).finish() 182 } 183 } 184 const _: () = { 185 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32); 186 assert!( 187 4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32 188 ); 189 }; 190 pub trait Host { 191 type Data; 192 fn f( 193 store: wasmtime::StoreContextMut<'_, Self::Data>, 194 ) -> impl ::core::future::Future< 195 Output = impl FnOnce( 196 wasmtime::StoreContextMut<'_, Self::Data>, 197 ) -> LiveType + Send + Sync + 'static, 198 > + Send + Sync + 'static 199 where 200 Self: Sized; 201 } 202 pub fn add_to_linker_get_host<T, G>( 203 linker: &mut wasmtime::component::Linker<T>, 204 host_getter: G, 205 ) -> wasmtime::Result<()> 206 where 207 T: 'static, 208 G: for<'a> wasmtime::component::GetHost< 209 &'a mut T, 210 Host: Host<Data = T> + Send, 211 >, 212 T: Send + 'static, 213 { 214 let mut inst = linker.instance("a:b/interface-with-live-type")?; 215 inst.func_wrap_concurrent( 216 "f", 217 move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| { 218 let host = caller; 219 let r = <G::Host as Host>::f(host); 220 Box::pin(async move { 221 let fun = r.await; 222 Box::new(move |mut caller: wasmtime::StoreContextMut<'_, T>| { 223 let r = fun(caller); 224 Ok((r,)) 225 }) 226 as Box< 227 dyn FnOnce( 228 wasmtime::StoreContextMut<'_, T>, 229 ) -> wasmtime::Result<(LiveType,)> + Send + Sync, 230 > 231 }) 232 as ::core::pin::Pin< 233 Box< 234 dyn ::core::future::Future< 235 Output = Box< 236 dyn FnOnce( 237 wasmtime::StoreContextMut<'_, T>, 238 ) -> wasmtime::Result<(LiveType,)> + Send + Sync, 239 >, 240 > + Send + Sync + 'static, 241 >, 242 > 243 }, 244 )?; 245 Ok(()) 246 } 247 pub fn add_to_linker<T, U>( 248 linker: &mut wasmtime::component::Linker<T>, 249 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static, 250 ) -> wasmtime::Result<()> 251 where 252 T: 'static, 253 U: Host<Data = T> + Send, 254 T: Send + 'static, 255 { 256 add_to_linker_get_host(linker, get) 257 } 258 impl<_T: Host> Host for &mut _T { 259 type Data = _T::Data; 260 fn f( 261 store: wasmtime::StoreContextMut<'_, Self::Data>, 262 ) -> impl ::core::future::Future< 263 Output = impl FnOnce( 264 wasmtime::StoreContextMut<'_, Self::Data>, 265 ) -> LiveType + Send + Sync + 'static, 266 > + Send + Sync + 'static 267 where 268 Self: Sized, 269 { 270 <_T as Host>::f(store) 271 } 272 } 273 } 274 #[allow(clippy::all)] 275 pub mod interface_with_dead_type { 276 #[allow(unused_imports)] 277 use wasmtime::component::__internal::{anyhow, Box}; 278 pub type LiveType = super::super::super::a::b::interface_with_live_type::LiveType; 279 const _: () = { 280 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32); 281 assert!( 282 4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32 283 ); 284 }; 285 #[derive(wasmtime::component::ComponentType)] 286 #[derive(wasmtime::component::Lift)] 287 #[derive(wasmtime::component::Lower)] 288 #[component(record)] 289 #[derive(Clone, Copy)] 290 pub struct DeadType { 291 #[component(name = "a")] 292 pub a: u32, 293 } 294 impl core::fmt::Debug for DeadType { 295 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 296 f.debug_struct("DeadType").field("a", &self.a).finish() 297 } 298 } 299 const _: () = { 300 assert!(4 == < DeadType as wasmtime::component::ComponentType >::SIZE32); 301 assert!( 302 4 == < DeadType as wasmtime::component::ComponentType >::ALIGN32 303 ); 304 }; 305 #[derive(wasmtime::component::ComponentType)] 306 #[derive(wasmtime::component::Lift)] 307 #[derive(wasmtime::component::Lower)] 308 #[component(variant)] 309 #[derive(Clone, Copy)] 310 pub enum V { 311 #[component(name = "a")] 312 A(LiveType), 313 #[component(name = "b")] 314 B(DeadType), 315 } 316 impl core::fmt::Debug for V { 317 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 318 match self { 319 V::A(e) => f.debug_tuple("V::A").field(e).finish(), 320 V::B(e) => f.debug_tuple("V::B").field(e).finish(), 321 } 322 } 323 } 324 const _: () = { 325 assert!(8 == < V as wasmtime::component::ComponentType >::SIZE32); 326 assert!(4 == < V as wasmtime::component::ComponentType >::ALIGN32); 327 }; 328 pub trait Host {} 329 pub fn add_to_linker_get_host<T, G>( 330 linker: &mut wasmtime::component::Linker<T>, 331 host_getter: G, 332 ) -> wasmtime::Result<()> 333 where 334 T: 'static, 335 G: for<'a> wasmtime::component::GetHost<&'a mut T, Host: Host + Send>, 336 T: Send + 'static, 337 { 338 let mut inst = linker.instance("a:b/interface-with-dead-type")?; 339 Ok(()) 340 } 341 pub fn add_to_linker<T, U>( 342 linker: &mut wasmtime::component::Linker<T>, 343 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static, 344 ) -> wasmtime::Result<()> 345 where 346 T: 'static, 347 U: Host + Send, 348 T: Send + 'static, 349 { 350 add_to_linker_get_host(linker, get) 351 } 352 impl<_T: Host + ?Sized> Host for &mut _T {} 353 } 354 } 355 } 356