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https://github.com/servo/servo
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e7c35d5445
Testing: Just refactor, should be covered by WPT Part of #40600 Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
58 lines
2.1 KiB
Rust
58 lines
2.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/// Defines a macro `native_fn!` to create a JavaScript function from a Rust function pointer.
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/// # Example
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/// ```
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/// let js_function: Rc<Function> = native_fn!(my_rust_function, c"myFunction", 2, 0);
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/// ```
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#[macro_export]
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macro_rules! native_fn {
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($cx:expr, $call:expr, $name:expr, $nargs:expr, $flags:expr) => {{
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let fun_obj = $crate::native_raw_obj_fn!($cx, $call, $name, $nargs, $flags);
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let cx = $cx.into();
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#[expect(unsafe_code)]
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unsafe {
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Function::new(cx, fun_obj)
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}
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}};
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}
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/// Defines a macro `native_raw_obj_fn!` to create a raw JavaScript function object.
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/// # Example
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/// ```
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/// let raw_function_obj: *mut JSObject = native_raw_obj_fn!(cx, my_rust_function, c"myFunction", 2, 0);
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/// ```
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#[macro_export]
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macro_rules! native_raw_obj_fn {
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($cx:expr, $call:expr, $name:expr, $nargs:expr, $flags:expr) => {{
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#[expect(unsafe_code)]
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#[allow(clippy::macro_metavars_in_unsafe)]
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unsafe extern "C" fn wrapper(cx: *mut JSContext, argc: u32, vp: *mut JSVal) -> bool {
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let mut cx = unsafe {
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// SAFETY: We are in SM hook
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js::context::JSContext::from_ptr(
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std::ptr::NonNull::new(cx).expect("JSContext is not null in SM hook"),
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)
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};
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let call_args = unsafe { CallArgs::from_vp(vp, argc) };
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$call(&mut cx, call_args)
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}
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#[expect(unsafe_code)]
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#[allow(clippy::macro_metavars_in_unsafe)]
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unsafe {
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let name: &std::ffi::CStr = $name;
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let raw_fun = js::jsapi::JS_NewFunction(
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$cx.raw_cx(),
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Some(wrapper),
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$nargs,
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$flags,
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name.as_ptr() as *const std::ffi::c_char,
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);
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assert!(!raw_fun.is_null());
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js::jsapi::JS_GetFunctionObject(raw_fun)
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}
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}};
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}
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