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> { 10 instance_pre: wasmtime::component::InstancePre<T>, 11 indices: ImportsIndices, 12 } 13 impl<T> 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> 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, 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, 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: Send, 153 U: a::b::interface_with_live_type::Host 154 + a::b::interface_with_dead_type::Host + Send, 155 { 156 a::b::interface_with_live_type::add_to_linker(linker, get)?; 157 a::b::interface_with_dead_type::add_to_linker(linker, get)?; 158 Ok(()) 159 } 160 } 161 }; 162 pub mod a { 163 pub mod b { 164 #[allow(clippy::all)] 165 pub mod interface_with_live_type { 166 #[allow(unused_imports)] 167 use wasmtime::component::__internal::{anyhow, Box}; 168 #[derive(wasmtime::component::ComponentType)] 169 #[derive(wasmtime::component::Lift)] 170 #[derive(wasmtime::component::Lower)] 171 #[component(record)] 172 #[derive(Clone, Copy)] 173 pub struct LiveType { 174 #[component(name = "a")] 175 pub a: u32, 176 } 177 impl core::fmt::Debug for LiveType { 178 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 179 f.debug_struct("LiveType").field("a", &self.a).finish() 180 } 181 } 182 const _: () = { 183 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32); 184 assert!( 185 4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32 186 ); 187 }; 188 #[wasmtime::component::__internal::trait_variant_make(::core::marker::Send)] 189 pub trait Host: Send { 190 async fn f(&mut self) -> LiveType; 191 } 192 pub trait GetHost< 193 T, 194 D, 195 >: Fn(T) -> <Self as GetHost<T, D>>::Host + Send + Sync + Copy + 'static { 196 type Host: Host + Send; 197 } 198 impl<F, T, D, O> GetHost<T, D> for F 199 where 200 F: Fn(T) -> O + Send + Sync + Copy + 'static, 201 O: Host + Send, 202 { 203 type Host = O; 204 } 205 pub fn add_to_linker_get_host< 206 T, 207 G: for<'a> GetHost<&'a mut T, T, Host: Host + Send>, 208 >( 209 linker: &mut wasmtime::component::Linker<T>, 210 host_getter: G, 211 ) -> wasmtime::Result<()> 212 where 213 T: Send, 214 { 215 let mut inst = linker.instance("a:b/interface-with-live-type")?; 216 inst.func_wrap_async( 217 "f", 218 move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| { 219 use tracing::Instrument; 220 let span = tracing::span!( 221 tracing::Level::TRACE, "wit-bindgen import", module = 222 "interface-with-live-type", function = "f", 223 ); 224 wasmtime::component::__internal::Box::new( 225 async move { 226 tracing::event!(tracing::Level::TRACE, "call"); 227 let host = &mut host_getter(caller.data_mut()); 228 let r = Host::f(host).await; 229 tracing::event!( 230 tracing::Level::TRACE, result = tracing::field::debug(& r), 231 "return" 232 ); 233 Ok((r,)) 234 } 235 .instrument(span), 236 ) 237 }, 238 )?; 239 Ok(()) 240 } 241 pub fn add_to_linker<T, U>( 242 linker: &mut wasmtime::component::Linker<T>, 243 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static, 244 ) -> wasmtime::Result<()> 245 where 246 U: Host + Send, 247 T: Send, 248 { 249 add_to_linker_get_host(linker, get) 250 } 251 impl<_T: Host + ?Sized + Send> Host for &mut _T { 252 async fn f(&mut self) -> LiveType { 253 Host::f(*self).await 254 } 255 } 256 } 257 #[allow(clippy::all)] 258 pub mod interface_with_dead_type { 259 #[allow(unused_imports)] 260 use wasmtime::component::__internal::{anyhow, Box}; 261 pub type LiveType = super::super::super::a::b::interface_with_live_type::LiveType; 262 const _: () = { 263 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32); 264 assert!( 265 4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32 266 ); 267 }; 268 #[derive(wasmtime::component::ComponentType)] 269 #[derive(wasmtime::component::Lift)] 270 #[derive(wasmtime::component::Lower)] 271 #[component(record)] 272 #[derive(Clone, Copy)] 273 pub struct DeadType { 274 #[component(name = "a")] 275 pub a: u32, 276 } 277 impl core::fmt::Debug for DeadType { 278 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 279 f.debug_struct("DeadType").field("a", &self.a).finish() 280 } 281 } 282 const _: () = { 283 assert!(4 == < DeadType as wasmtime::component::ComponentType >::SIZE32); 284 assert!( 285 4 == < DeadType as wasmtime::component::ComponentType >::ALIGN32 286 ); 287 }; 288 #[derive(wasmtime::component::ComponentType)] 289 #[derive(wasmtime::component::Lift)] 290 #[derive(wasmtime::component::Lower)] 291 #[component(variant)] 292 #[derive(Clone, Copy)] 293 pub enum V { 294 #[component(name = "a")] 295 A(LiveType), 296 #[component(name = "b")] 297 B(DeadType), 298 } 299 impl core::fmt::Debug for V { 300 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { 301 match self { 302 V::A(e) => f.debug_tuple("V::A").field(e).finish(), 303 V::B(e) => f.debug_tuple("V::B").field(e).finish(), 304 } 305 } 306 } 307 const _: () = { 308 assert!(8 == < V as wasmtime::component::ComponentType >::SIZE32); 309 assert!(4 == < V as wasmtime::component::ComponentType >::ALIGN32); 310 }; 311 #[wasmtime::component::__internal::trait_variant_make(::core::marker::Send)] 312 pub trait Host: Send {} 313 pub trait GetHost< 314 T, 315 D, 316 >: Fn(T) -> <Self as GetHost<T, D>>::Host + Send + Sync + Copy + 'static { 317 type Host: Host + Send; 318 } 319 impl<F, T, D, O> GetHost<T, D> for F 320 where 321 F: Fn(T) -> O + Send + Sync + Copy + 'static, 322 O: Host + Send, 323 { 324 type Host = O; 325 } 326 pub fn add_to_linker_get_host< 327 T, 328 G: for<'a> GetHost<&'a mut T, T, Host: Host + Send>, 329 >( 330 linker: &mut wasmtime::component::Linker<T>, 331 host_getter: G, 332 ) -> wasmtime::Result<()> 333 where 334 T: Send, 335 { 336 let mut inst = linker.instance("a:b/interface-with-dead-type")?; 337 Ok(()) 338 } 339 pub fn add_to_linker<T, U>( 340 linker: &mut wasmtime::component::Linker<T>, 341 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static, 342 ) -> wasmtime::Result<()> 343 where 344 U: Host + Send, 345 T: Send, 346 { 347 add_to_linker_get_host(linker, get) 348 } 349 impl<_T: Host + ?Sized + Send> Host for &mut _T {} 350 } 351 } 352 } 353