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fcdcc8c0c3
See https://github.com/denoland/deno/pull/16814#discussion_r1032744083. Allows nullable buffers in low-level ops like FFI: ```rust fn op_ffi_ptr_of<FP>( state: &mut OpState, buf: *const u8, out: &mut [u32], ) where FP: FfiPermissions + 'static { // .. } ```
55 lines
1.9 KiB
Text
55 lines
1.9 KiB
Text
struct op_ffi_ptr_of_fast<FP> {
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_phantom: ::std::marker::PhantomData<FP>,
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}
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impl<'scope, FP> deno_core::v8::fast_api::FastFunction for op_ffi_ptr_of_fast<FP>
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where
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FP: FfiPermissions + 'static,
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{
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fn function(&self) -> *const ::std::ffi::c_void {
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op_ffi_ptr_of_fast_fn::<FP> as *const ::std::ffi::c_void
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}
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fn args(&self) -> &'static [deno_core::v8::fast_api::Type] {
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use deno_core::v8::fast_api::Type::*;
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use deno_core::v8::fast_api::CType;
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&[V8Value, TypedArray(CType::Uint8), TypedArray(CType::Uint32), CallbackOptions]
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}
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fn return_type(&self) -> deno_core::v8::fast_api::CType {
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deno_core::v8::fast_api::CType::Void
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}
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}
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fn op_ffi_ptr_of_fast_fn<'scope, FP>(
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_: deno_core::v8::Local<deno_core::v8::Object>,
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buf: *const deno_core::v8::fast_api::FastApiTypedArray<u8>,
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out: *const deno_core::v8::fast_api::FastApiTypedArray<u32>,
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fast_api_callback_options: *mut deno_core::v8::fast_api::FastApiCallbackOptions,
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) -> ()
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where
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FP: FfiPermissions + 'static,
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{
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use deno_core::v8;
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use deno_core::_ops;
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let __opts: &mut v8::fast_api::FastApiCallbackOptions = unsafe {
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&mut *fast_api_callback_options
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};
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let __ctx = unsafe {
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&*(v8::Local::<v8::External>::cast(unsafe { __opts.data.data }).value()
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as *const _ops::OpCtx)
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};
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let state = &mut ::std::cell::RefCell::borrow_mut(&__ctx.state);
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let buf = match unsafe { &*buf }.get_storage_if_aligned() {
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Some(v) => v.as_ptr(),
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None => {
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unsafe { &mut *fast_api_callback_options }.fallback = true;
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return Default::default();
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}
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};
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let out = match unsafe { &*out }.get_storage_if_aligned() {
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Some(v) => v,
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None => {
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unsafe { &mut *fast_api_callback_options }.fallback = true;
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return Default::default();
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}
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};
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let result = op_ffi_ptr_of::call::<FP>(state, buf, out);
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result
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}
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