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3487fde236
Follow-up to #18210: * we are passing the generated `cfg` object into the state function rather than passing individual config fields * reduce cloning dramatically by making the state_fn `FnOnce` * `take` for `ExtensionBuilder` to avoid more unnecessary copies * renamed `config` to `options`
161 lines
3.9 KiB
Rust
161 lines
3.9 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::AnyError;
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use deno_core::futures::channel::mpsc;
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use deno_core::v8;
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use deno_core::OpState;
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use std::cell::RefCell;
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use std::mem::size_of;
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use std::os::raw::c_char;
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use std::os::raw::c_short;
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use std::path::Path;
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use std::ptr;
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use std::rc::Rc;
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mod call;
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mod callback;
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mod dlfcn;
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mod ir;
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mod repr;
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mod r#static;
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mod symbol;
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mod turbocall;
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use call::op_ffi_call_nonblocking;
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use call::op_ffi_call_ptr;
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use call::op_ffi_call_ptr_nonblocking;
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use callback::op_ffi_unsafe_callback_create;
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use callback::op_ffi_unsafe_callback_ref;
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use dlfcn::op_ffi_load;
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use dlfcn::ForeignFunction;
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use r#static::op_ffi_get_static;
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use repr::*;
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use symbol::NativeType;
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use symbol::Symbol;
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#[cfg(not(target_pointer_width = "64"))]
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compile_error!("platform not supported");
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const _: () = {
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assert!(size_of::<c_char>() == 1);
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assert!(size_of::<c_short>() == 2);
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assert!(size_of::<*const ()>() == 8);
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};
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thread_local! {
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static LOCAL_ISOLATE_POINTER: RefCell<*const v8::Isolate> = RefCell::new(ptr::null());
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}
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pub(crate) const MAX_SAFE_INTEGER: isize = 9007199254740991;
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pub(crate) const MIN_SAFE_INTEGER: isize = -9007199254740991;
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pub struct Unstable(pub bool);
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fn check_unstable(state: &OpState, api_name: &str) {
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let unstable = state.borrow::<Unstable>();
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if !unstable.0 {
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eprintln!(
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"Unstable API '{api_name}'. The --unstable flag must be provided."
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);
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std::process::exit(70);
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}
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}
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pub fn check_unstable2(state: &Rc<RefCell<OpState>>, api_name: &str) {
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let state = state.borrow();
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check_unstable(&state, api_name)
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}
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pub trait FfiPermissions {
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fn check(&mut self, path: Option<&Path>) -> Result<(), AnyError>;
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}
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pub(crate) type PendingFfiAsyncWork = Box<dyn FnOnce()>;
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pub(crate) struct FfiState {
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pub(crate) async_work_sender: mpsc::UnboundedSender<PendingFfiAsyncWork>,
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pub(crate) async_work_receiver: mpsc::UnboundedReceiver<PendingFfiAsyncWork>,
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}
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deno_core::extension!(deno_ffi,
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deps = [ deno_web ],
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parameters = [P: FfiPermissions],
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ops = [
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op_ffi_load<P>,
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op_ffi_get_static,
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op_ffi_call_nonblocking,
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op_ffi_call_ptr<P>,
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op_ffi_call_ptr_nonblocking<P>,
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op_ffi_ptr_create<P>,
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op_ffi_ptr_equals<P>,
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op_ffi_ptr_of<P>,
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op_ffi_ptr_offset<P>,
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op_ffi_ptr_value<P>,
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op_ffi_get_buf<P>,
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op_ffi_buf_copy_into<P>,
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op_ffi_cstr_read<P>,
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op_ffi_read_bool<P>,
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op_ffi_read_u8<P>,
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op_ffi_read_i8<P>,
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op_ffi_read_u16<P>,
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op_ffi_read_i16<P>,
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op_ffi_read_u32<P>,
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op_ffi_read_i32<P>,
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op_ffi_read_u64<P>,
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op_ffi_read_i64<P>,
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op_ffi_read_f32<P>,
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op_ffi_read_f64<P>,
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op_ffi_read_ptr<P>,
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op_ffi_unsafe_callback_create<P>,
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op_ffi_unsafe_callback_ref,
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],
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esm = [ "00_ffi.js" ],
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options = {
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unstable: bool,
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},
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state = |state, options| {
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// Stolen from deno_webgpu, is there a better option?
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state.put(Unstable(options.unstable));
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let (async_work_sender, async_work_receiver) =
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mpsc::unbounded::<PendingFfiAsyncWork>();
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state.put(FfiState {
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async_work_receiver,
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async_work_sender,
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});
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},
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event_loop_middleware = event_loop_middleware,
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);
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fn event_loop_middleware(
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op_state_rc: Rc<RefCell<OpState>>,
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_cx: &mut std::task::Context,
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) -> bool {
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// FFI callbacks coming in from other threads will call in and get queued.
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let mut maybe_scheduling = false;
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let mut work_items: Vec<PendingFfiAsyncWork> = vec![];
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{
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let mut op_state = op_state_rc.borrow_mut();
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let ffi_state = op_state.borrow_mut::<FfiState>();
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while let Ok(Some(async_work_fut)) =
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ffi_state.async_work_receiver.try_next()
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{
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// Move received items to a temporary vector so that we can drop the `op_state` borrow before we do the work.
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work_items.push(async_work_fut);
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maybe_scheduling = true;
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}
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drop(op_state);
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}
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while let Some(async_work_fut) = work_items.pop() {
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async_work_fut();
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}
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maybe_scheduling
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}
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