Summary
Acknowledge an interrupt and re-arm it.
Declaration
#include <zircon/syscalls.h>
zx_status_t zx_interrupt_ack(zx_handle_t handle);
Description
zx_interrupt_ack() acknowledges an interrupt object, causing it to be eligible
to trigger again (and delivering a packet to the port it is bound to).
If the interrupt object is a physical interrupt, if it is a level interrupt and still asserted, or is an edge interrupt that has been asserted since it last triggered, the interrupt will trigger immediately, delivering a packet to the port it is bound to.
Virtual interrupts behave as edge interrupts.
This syscall only operates on interrupts bound to a port. Interrupts
being waited upon with zx_interrupt_wait() do not need to be re-armed with this
call -- it happens automatically when zx_interrupt_wait() is called.
Rights
handle must be of type ZX_OBJ_TYPE_INTERRUPT and have ZX_RIGHT_WRITE.
Return value
zx_interrupt_ack() returns ZX_OK on success. In the event
of failure, a negative error value is returned.
Errors
ZX_ERR_BAD_HANDLE handle is an invalid handle.
ZX_ERR_WRONG_TYPE handle is not an interrupt object.
ZX_ERR_BAD_STATE handle is not bound to a port.
ZX_ERR_CANCELED zx_interrupt_destroy() was called on handle.
ZX_ERR_ACCESS_DENIED handle lacks ZX_RIGHT_WRITE.