mirror of
https://github.com/denoland/deno.git
synced 2024-12-11 01:58:05 -05:00
117 lines
2.5 KiB
Markdown
117 lines
2.5 KiB
Markdown
# napi
|
|
|
|
This directory contains source for Deno's Node-API implementation. It depends on
|
|
`napi_sym` and `deno_napi`.
|
|
|
|
- [`async.rs`](./async.rs) - Asyncronous work related functions.
|
|
- [`env.rs`](./env.rs) - Environment related functions.
|
|
- [`js_native_api.rs`](./js_native_api.rs) - V8/JS related functions.
|
|
- [`thread_safe_function.rs`](./threadsafe_functions.rs) - Thread safe function
|
|
related functions.
|
|
|
|
## Adding a new function
|
|
|
|
Add the symbol name to
|
|
[`cli/napi_sym/symbol_exports.json`](../napi_sym/symbol_exports.json).
|
|
|
|
```diff
|
|
{
|
|
"symbols": [
|
|
...
|
|
"napi_get_undefined",
|
|
- "napi_get_null"
|
|
+ "napi_get_null",
|
|
+ "napi_get_boolean"
|
|
]
|
|
}
|
|
```
|
|
|
|
Determine where to place the implementation. `napi_get_boolean` is related to JS
|
|
values so we will place it in `js_native_api.rs`. If something is not clear,
|
|
just create a new file module.
|
|
|
|
See [`napi_sym`](../napi_sym/) for writing the implementation:
|
|
|
|
```rust
|
|
#[napi_sym::napi_sym]
|
|
pub fn napi_get_boolean(
|
|
env: *mut Env,
|
|
value: bool,
|
|
result: *mut napi_value,
|
|
) -> Result {
|
|
// ...
|
|
Ok(())
|
|
}
|
|
```
|
|
|
|
Update the generated symbol lists using the script:
|
|
|
|
```
|
|
deno run --allow-write tools/napi/generate_symbols_lists.js
|
|
```
|
|
|
|
Add a test in [`/test_napi`](../../test_napi/). You can also refer to Node.js
|
|
test suite for Node-API.
|
|
|
|
```js
|
|
// test_napi/boolean_test.js
|
|
import { assertEquals, loadTestLibrary } from "./common.js";
|
|
const lib = loadTestLibrary();
|
|
Deno.test("napi get boolean", function () {
|
|
assertEquals(lib.test_get_boolean(true), true);
|
|
assertEquals(lib.test_get_boolean(false), false);
|
|
});
|
|
```
|
|
|
|
```rust
|
|
// test_napi/src/boolean.rs
|
|
|
|
use napi_sys::Status::napi_ok;
|
|
use napi_sys::ValueType::napi_boolean;
|
|
use napi_sys::*;
|
|
|
|
extern "C" fn test_boolean(
|
|
env: napi_env,
|
|
info: napi_callback_info,
|
|
) -> napi_value {
|
|
let (args, argc, _) = crate::get_callback_info!(env, info, 1);
|
|
assert_eq!(argc, 1);
|
|
|
|
let mut ty = -1;
|
|
assert!(unsafe { napi_typeof(env, args[0], &mut ty) } == napi_ok);
|
|
assert_eq!(ty, napi_boolean);
|
|
|
|
// Use napi_get_boolean here...
|
|
|
|
value
|
|
}
|
|
|
|
pub fn init(env: napi_env, exports: napi_value) {
|
|
let properties = &[crate::new_property!(env, "test_boolean\0", test_boolean)];
|
|
|
|
unsafe {
|
|
napi_define_properties(env, exports, properties.len(), properties.as_ptr())
|
|
};
|
|
}
|
|
```
|
|
|
|
```diff
|
|
// test_napi/src/lib.rs
|
|
|
|
+ mod boolean;
|
|
|
|
...
|
|
|
|
#[no_mangle]
|
|
unsafe extern "C" fn napi_register_module_v1(
|
|
env: napi_env,
|
|
exports: napi_value,
|
|
) -> napi_value {
|
|
...
|
|
+ boolean::init(env, exports);
|
|
|
|
exports
|
|
}
|
|
```
|
|
|
|
Run the test using `cargo test -p test_napi`.
|