7b57f122b9
Make file descriptors into refcount references fixes #3525 Remove `fn dup` in `trait FileDescription`, define `struct FileDescriptor(Rc<RefCell<dyn FileDescription>>)`, and use `BTreeMap<i32, FileDescriptor>` in `FdTable`. --- There are some refactors similar to the following form: ```rust { // origin: if let Some(file_descriptor) = this.machine.fds.get_mut(fd) { // write file_descriptor this.try_unwrap_io_result(result) } else { this.fd_not_found() } } { // now: let Some(mut file_descriptor) = this.machine.fds.get_mut(fd) else { return this.fd_not_found(); }; // write file_descriptor drop(file_descriptor); this.try_unwrap_io_result(result) } ``` The origin form can't compile because as using `RefCell` to get interior mutability, `fn get_mut` return `Option<std::cell::RefMut<'_, dyn FileDescription>>` instead of `Option<&mut dyn FileDescription>` now, and the `deref_mut` on `file_descriptor: RefMut` will cause borrow `this` as mutable more than once at a time. So this form of refactors and manual drops are are implemented to avoid borrowing `this` at the same time. |
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| bootstrap | ||
| ci | ||
| doc | ||
| etc | ||
| librustdoc | ||
| llvm-project@5399a24c66 | ||
| rustdoc-json-types | ||
| tools | ||
| README.md | ||
| stage0.json | ||
| version | ||
This directory contains some source code for the Rust project, including:
- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.