35 lines
854 B
Rust
35 lines
854 B
Rust
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//! Context management
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/// File operations
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pub mod file;
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/// Context list
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pub static mut CONTEXT: Context = Context::new();
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/// A context, which identifies either a process or a thread
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#[derive(Copy, Clone, Debug)]
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pub struct Context {
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/// The open files in the scheme
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pub files: [Option<file::File>; 32]
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}
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impl Context {
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pub const fn new() -> Context {
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Context {
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files: [None; 32]
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}
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}
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/// Add a file to the lowest available slot.
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/// Return the file descriptor number or None if no slot was found
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pub fn add_file(&mut self, file: file::File) -> Option<usize> {
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for (i, mut file_option) in self.files.iter_mut().enumerate() {
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if file_option.is_none() {
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*file_option = Some(file);
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return Some(i);
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}
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}
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None
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}
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}
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