1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/// Auto-generated bindings for a pre-instantiated version of a
/// component which implements the world `empty`.
///
/// This structure is created through [`EmptyPre::new`] which
/// takes a [`InstancePre`](wasmtime::component::InstancePre) that
/// has been created through a [`Linker`](wasmtime::component::Linker).
///
/// For more information see [`Empty`] as well.
pub struct EmptyPre<T> {
instance_pre: wasmtime::component::InstancePre<T>,
indices: EmptyIndices,
}
impl<T> Clone for EmptyPre<T> {
fn clone(&self) -> Self {
Self {
instance_pre: self.instance_pre.clone(),
indices: self.indices.clone(),
}
}
}
impl<_T> EmptyPre<_T> {
/// Creates a new copy of `EmptyPre` bindings which can then
/// be used to instantiate into a particular store.
///
/// This method may fail if the component behind `instance_pre`
/// does not have the required exports.
pub fn new(
instance_pre: wasmtime::component::InstancePre<_T>,
) -> wasmtime::Result<Self> {
let indices = EmptyIndices::new(instance_pre.component())?;
Ok(Self { instance_pre, indices })
}
pub fn engine(&self) -> &wasmtime::Engine {
self.instance_pre.engine()
}
pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> {
&self.instance_pre
}
/// Instantiates a new instance of [`Empty`] within the
/// `store` provided.
///
/// This function will use `self` as the pre-instantiated
/// instance to perform instantiation. Afterwards the preloaded
/// indices in `self` are used to lookup all exports on the
/// resulting instance.
pub fn instantiate(
&self,
mut store: impl wasmtime::AsContextMut<Data = _T>,
) -> wasmtime::Result<Empty> {
let mut store = store.as_context_mut();
let instance = self.instance_pre.instantiate(&mut store)?;
self.indices.load(&mut store, &instance)
}
}
/// Auto-generated bindings for index of the exports of
/// `empty`.
///
/// This is an implementation detail of [`EmptyPre`] and can
/// be constructed if needed as well.
///
/// For more information see [`Empty`] as well.
#[derive(Clone)]
pub struct EmptyIndices {}
/// Auto-generated bindings for an instance a component which
/// implements the world `empty`.
///
/// This structure can be created through a number of means
/// depending on your requirements and what you have on hand:
///
/// * The most convenient way is to use
/// [`Empty::instantiate`] which only needs a
/// [`Store`], [`Component`], and [`Linker`].
///
/// * Alternatively you can create a [`EmptyPre`] ahead of
/// time with a [`Component`] to front-load string lookups
/// of exports once instead of per-instantiation. This
/// method then uses [`EmptyPre::instantiate`] to
/// create a [`Empty`].
///
/// * If you've instantiated the instance yourself already
/// then you can use [`Empty::new`].
///
/// * You can also access the guts of instantiation through
/// [`EmptyIndices::new_instance`] followed
/// by [`EmptyIndices::load`] to crate an instance of this
/// type.
///
/// These methods are all equivalent to one another and move
/// around the tradeoff of what work is performed when.
///
/// [`Store`]: wasmtime::Store
/// [`Component`]: wasmtime::component::Component
/// [`Linker`]: wasmtime::component::Linker
pub struct Empty {}
const _: () = {
#[allow(unused_imports)]
use wasmtime::component::__internal::anyhow;
impl EmptyIndices {
/// Creates a new copy of `EmptyIndices` bindings which can then
/// be used to instantiate into a particular store.
///
/// This method may fail if the component does not have the
/// required exports.
pub fn new(
component: &wasmtime::component::Component,
) -> wasmtime::Result<Self> {
let _component = component;
Ok(EmptyIndices {})
}
/// Creates a new instance of [`EmptyIndices`] from an
/// instantiated component.
///
/// This method of creating a [`Empty`] will perform string
/// lookups for all exports when this method is called. This
/// will only succeed if the provided instance matches the
/// requirements of [`Empty`].
pub fn new_instance(
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<Self> {
let _instance = instance;
Ok(EmptyIndices {})
}
/// Uses the indices stored in `self` to load an instance
/// of [`Empty`] from the instance provided.
///
/// Note that at this time this method will additionally
/// perform type-checks of all exports.
pub fn load(
&self,
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<Empty> {
let _instance = instance;
Ok(Empty {})
}
}
impl Empty {
/// Convenience wrapper around [`EmptyPre::new`] and
/// [`EmptyPre::instantiate`].
pub fn instantiate<_T>(
mut store: impl wasmtime::AsContextMut<Data = _T>,
component: &wasmtime::component::Component,
linker: &wasmtime::component::Linker<_T>,
) -> wasmtime::Result<Empty> {
let pre = linker.instantiate_pre(component)?;
EmptyPre::new(pre)?.instantiate(store)
}
/// Convenience wrapper around [`EmptyIndices::new_instance`] and
/// [`EmptyIndices::load`].
pub fn new(
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<Empty> {
let indices = EmptyIndices::new_instance(&mut store, instance)?;
indices.load(store, instance)
}
}
};
|
