KUserBindableInterruptEvent: Difference between revisions

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[[Category:Kernel ~~objects~~]]

[[Category:Kernel interrupt events]]

class [[KUserBindableInterruptEvent]] extends [[KSchedulableInterruptEvent]]

Size : 0xC bytes

Abstract base class for ~~KEventInterruptEvent~~ and ~~KSemaphoreInterruptEvent~~, to be used with svcBindInterrupt.

Abstract class which is a base class for [[KEvent]] and [[KSemaphore]], to be used with svcBindInterrupt.

~~It appears that semaphores were originally planned~~ to ~~be bindable by svcBindInterrupt~~ (~~except for the FIQ abstraction interrupt, SGI #15~~)~~. The sole reason preventing semaphores to be used with svcBindInterrupt is a type check~~.

Semaphores cannot be bound to level high ("rising edge") active interrupts.

For public interrupts (i.e. anything else than SGI #15 in this case), ~~svcBindInterrupts~~ sets the flag that indicates that the interrupt shall be ~~masked~~ after each time the interrupt is received.

For public interrupts (i.e. anything else than SGI #15 in this case), svcBindInterrupt sets the flag that indicates that the interrupt shall be disabled after each time the interrupt is received.

The second virtual function ~~unmasks~~ the interrupt (using the interrupt ID) and signals the ~~parent~~ object. In the case of ~~KSemaphoreInterruptEvent~~ this also ~~increment~~ the ~~parent~~ semaphore's count.

The second virtual function reenables the interrupt (using the interrupt ID) and signals the object (as synchronization object). In the case of KSemaphore this also increments the semaphore's count.

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-[[Category:Kernel objects]]
+[[Category:Kernel interrupt events]]
 class [[KUserBindableInterruptEvent]] extends [[KSchedulableInterruptEvent]]
 Size : 0xC bytes
-Abstract base class for KEventInterruptEvent and KSemaphoreInterruptEvent, to be used with svcBindInterrupt.
+Abstract class which is a base class for [[KEvent]] and [[KSemaphore]], to be used with svcBindInterrupt.
-It appears that semaphores were originally planned to be bindable by svcBindInterrupt (except for the FIQ abstraction interrupt, SGI #15). The sole reason preventing semaphores to be used with svcBindInterrupt is a type check.
+Semaphores cannot be bound to level high ("rising edge") active interrupts.
-For public interrupts (i.e. anything else than SGI #15 in this case), svcBindInterrupts sets the flag that indicates that the interrupt shall be masked after each time the interrupt is received.
+For public interrupts (i.e. anything else than SGI #15 in this case), svcBindInterrupt sets the flag that indicates that the interrupt shall be disabled after each time the interrupt is received.
-The second virtual function unmasks the interrupt (using the interrupt ID) and signals the parent object. In the case of KSemaphoreInterruptEvent this also increment the parent semaphore's count.
+The second virtual function reenables the interrupt (using the interrupt ID) and signals the object (as synchronization object). In the case of KSemaphore this also increments the semaphore's count.
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