wasmtime_c_api/component/
component.rs

1use std::ffi::{CStr, c_char};
2
3use anyhow::Context;
4use wasmtime::component::{Component, ComponentExportIndex};
5
6use crate::{wasm_byte_vec_t, wasm_config_t, wasm_engine_t, wasmtime_error_t};
7
8#[unsafe(no_mangle)]
9pub unsafe extern "C" fn wasmtime_config_wasm_component_model_set(
10    c: &mut wasm_config_t,
11    enable: bool,
12) {
13    c.config.wasm_component_model(enable);
14}
15
16#[derive(Clone)]
17#[repr(transparent)]
18pub struct wasmtime_component_t {
19    pub(crate) component: Component,
20}
21
22#[unsafe(no_mangle)]
23#[cfg(any(feature = "cranelift", feature = "winch"))]
24pub unsafe extern "C" fn wasmtime_component_new(
25    engine: &wasm_engine_t,
26    buf: *const u8,
27    len: usize,
28    component_out: &mut *mut wasmtime_component_t,
29) -> Option<Box<wasmtime_error_t>> {
30    let bytes = unsafe { crate::slice_from_raw_parts(buf, len) };
31    crate::handle_result(Component::new(&engine.engine, bytes), |component| {
32        *component_out = Box::into_raw(Box::new(wasmtime_component_t { component }));
33    })
34}
35
36#[unsafe(no_mangle)]
37#[cfg(any(feature = "cranelift", feature = "winch"))]
38pub unsafe extern "C" fn wasmtime_component_serialize(
39    component: &wasmtime_component_t,
40    ret: &mut wasm_byte_vec_t,
41) -> Option<Box<wasmtime_error_t>> {
42    crate::handle_result(component.component.serialize(), |buffer| {
43        ret.set_buffer(buffer);
44    })
45}
46
47#[unsafe(no_mangle)]
48pub unsafe extern "C" fn wasmtime_component_deserialize(
49    engine: &wasm_engine_t,
50    buf: *const u8,
51    len: usize,
52    component_out: &mut *mut wasmtime_component_t,
53) -> Option<Box<wasmtime_error_t>> {
54    let binary = unsafe { crate::slice_from_raw_parts(buf, len) };
55    crate::handle_result(
56        unsafe { Component::deserialize(&engine.engine, binary) },
57        |component| {
58            *component_out = Box::into_raw(Box::new(wasmtime_component_t { component }));
59        },
60    )
61}
62
63#[unsafe(no_mangle)]
64pub unsafe extern "C" fn wasmtime_component_deserialize_file(
65    engine: &wasm_engine_t,
66    path: *const c_char,
67    component_out: &mut *mut wasmtime_component_t,
68) -> Option<Box<wasmtime_error_t>> {
69    let path = unsafe { CStr::from_ptr(path) };
70    let result = path
71        .to_str()
72        .context("input path is not valid utf-8")
73        .and_then(|path| unsafe { Component::deserialize_file(&engine.engine, path) });
74    crate::handle_result(result, |component| {
75        *component_out = Box::into_raw(Box::new(wasmtime_component_t { component }));
76    })
77}
78
79#[unsafe(no_mangle)]
80pub unsafe extern "C" fn wasmtime_component_clone(
81    component: &wasmtime_component_t,
82) -> Box<wasmtime_component_t> {
83    Box::new(component.clone())
84}
85
86#[unsafe(no_mangle)]
87pub unsafe extern "C" fn wasmtime_component_delete(_component: Box<wasmtime_component_t>) {}
88
89#[repr(transparent)]
90pub struct wasmtime_component_export_index_t {
91    pub(crate) export_index: ComponentExportIndex,
92}
93
94#[unsafe(no_mangle)]
95pub unsafe extern "C" fn wasmtime_component_get_export_index(
96    component: &wasmtime_component_t,
97    instance_export_index: *const wasmtime_component_export_index_t,
98    name: *const u8,
99    name_len: usize,
100) -> Option<Box<wasmtime_component_export_index_t>> {
101    let name = unsafe { std::slice::from_raw_parts(name, name_len) };
102    let Ok(name) = std::str::from_utf8(name) else {
103        return None;
104    };
105
106    let instance_export_index = if instance_export_index.is_null() {
107        None
108    } else {
109        Some((*instance_export_index).export_index)
110    };
111
112    component
113        .component
114        .get_export_index(instance_export_index.as_ref(), &name)
115        .map(|export_index| Box::new(wasmtime_component_export_index_t { export_index }))
116}
117
118#[unsafe(no_mangle)]
119pub unsafe extern "C" fn wasmtime_component_export_index_delete(
120    _export_index: Box<wasmtime_component_export_index_t>,
121) {
122}
wasmtime_c_api/component/component.rs

wasmtime_c_api/component/
component.rs
