36 lines
753 B
Rust
36 lines
753 B
Rust
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//! Routines for managing interrupts.
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use core::prelude::v1::*;
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use core::marker::PhantomData;
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/// Helper struct that automatically restores interrupts
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/// on drop.
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struct DisableInterrupts(PhantomData<()>);
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/// Executes a closure, disabling interrupts until its completion.
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///
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/// Restores interrupts after the closure has completed
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/// execution.
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pub fn without_interrupts<F, T>(f: F) -> T
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where F: FnOnce() -> T
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{
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let _disabled = DisableInterrupts::new();
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f()
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}
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impl DisableInterrupts {
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#[inline]
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pub fn new() -> DisableInterrupts {
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unsafe { asm!("CLI") }
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DisableInterrupts(PhantomData)
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}
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}
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impl Drop for DisableInterrupts {
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#[inline]
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fn drop(&mut self) {
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unsafe { asm!("SEI") }
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}
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}
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