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do not expose interrupts

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This commit is contained in:
Corwin Kuiper 2021-03-07 01:05:41 +00:00
parent ac88468333
commit a034b2b83c
1 changed files with 7 additions and 7 deletions
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14
src/interrupt.rs
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@ -1,6 +1,6 @@
use crate::memory_mapped::MemoryMapped; use crate::memory_mapped::MemoryMapped;
pub enum Interrupt { pub(crate) enum Interrupt {
VBlank, VBlank,
HBlank, HBlank,
VCounter, VCounter,
@ -20,21 +20,21 @@ pub enum Interrupt {
const ENABLED_INTERRUPTS: MemoryMapped<u16> = unsafe { MemoryMapped::new(0x04000200) }; const ENABLED_INTERRUPTS: MemoryMapped<u16> = unsafe { MemoryMapped::new(0x04000200) };
const INTERRUPTS_ENABLED: MemoryMapped<u16> = unsafe { MemoryMapped::new(0x04000208) }; const INTERRUPTS_ENABLED: MemoryMapped<u16> = unsafe { MemoryMapped::new(0x04000208) };
pub fn enable(interrupt: Interrupt) { pub(crate) fn enable(interrupt: Interrupt) {
let _interrupt_token = temporary_interrupt_disable(); let _interrupt_token = temporary_interrupt_disable();
let interrupt = interrupt as usize; let interrupt = interrupt as usize;
let enabled = ENABLED_INTERRUPTS.get() | (1 << (interrupt as u16)); let enabled = ENABLED_INTERRUPTS.get() | (1 << (interrupt as u16));
ENABLED_INTERRUPTS.set(enabled); ENABLED_INTERRUPTS.set(enabled);
} }
pub fn disable(interrupt: Interrupt) { pub(crate) fn disable(interrupt: Interrupt) {
let _interrupt_token = temporary_interrupt_disable(); let _interrupt_token = temporary_interrupt_disable();
let interrupt = interrupt as usize; let interrupt = interrupt as usize;
let enabled = ENABLED_INTERRUPTS.get() & !(1 << (interrupt as u16)); let enabled = ENABLED_INTERRUPTS.get() & !(1 << (interrupt as u16));
ENABLED_INTERRUPTS.set(enabled); ENABLED_INTERRUPTS.set(enabled);
} }
pub struct Disable {} pub(crate) struct Disable {}
impl Drop for Disable { impl Drop for Disable {
fn drop(&mut self) { fn drop(&mut self) {
@ -42,15 +42,15 @@ impl Drop for Disable {
} }
} }
pub fn temporary_interrupt_disable() -> Disable { pub(crate) fn temporary_interrupt_disable() -> Disable {
disable_interrupts(); disable_interrupts();
Disable {} Disable {}
} }
pub fn enable_interrupts() { pub(crate) fn enable_interrupts() {
INTERRUPTS_ENABLED.set(1); INTERRUPTS_ENABLED.set(1);
} }
fn disable_interrupts() { pub(crate) fn disable_interrupts() {
INTERRUPTS_ENABLED.set(0); INTERRUPTS_ENABLED.set(0);
} }