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https://github.com/rcore-os/rCore-Tutorial-v3.git
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20 lines
421 B
Rust
20 lines
421 B
Rust
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mod pipe;
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mod stdio;
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use crate::mm::UserBuffer;
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use core::any::Any;
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pub trait File : Any + Send + Sync {
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fn read(&self, buf: UserBuffer) -> usize;
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fn write(&self, buf: UserBuffer) -> usize;
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fn as_any_ref(&self) -> &dyn Any;
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}
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impl dyn File {
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pub fn downcast_ref<T: File>(&self) -> Option<&T> {
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self.as_any_ref().downcast_ref::<T>()
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}
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}
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pub use pipe::{Pipe};
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pub use stdio::{Stdin, Stdout};
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