Bind an interrupt object to a port.
#include <zircon/syscalls.h> zx_status_t zx_interrupt_bind(zx_handle_t handle, zx_handle_t port_handle, uint64_t key, uint32_t options);
zx_interrupt_bind() binds or unbinds an interrupt object to a port.
An interrupt object may only be bound to a single port and may only be bound once. The interrupt can only bind to a port which is created with ZX_PORT_BIND_TO_INTERRUPT option.
When a bound interrupt object is triggered, a ZX_PKT_TYPE_INTERRUPT packet will
be delivered to the port it is bound to, with the timestamp (relative to ZX_CLOCK_MONOTONIC)
of when the interrupt was triggered in the
zx_packet_interrupt_t. The key used
when binding the interrupt will be present in the
key field of the
To bind to a port pass ZX_INTERRUPT_BIND in options.
To unbind a previously bound port pass ZX_INTERRUPT_UNBIND in options. For unbind the port_handle is required but the key is ignored. Unbinding the port removes previously queued packets to the port.
Before another packet may be delivered, the bound interrupt must be re-armed using the
zx_interrupt_ack() syscall. This is (in almost all cases) best done after the interrupt
packet has been fully processed. Especially in the case of multiple threads reading
packets from a port, if the processing thread re-arms the interrupt and it has triggered,
a packet will immediately be delivered to a waiting thread.
Interrupt packets are delivered via a dedicated queue on ports and are higher priority than non-interrupt packets.
handle must be of type ZX_OBJ_TYPE_INTERRUPT and have ZX_RIGHT_READ.
port_handle must be of type ZX_OBJ_TYPE_PORT and have ZX_RIGHT_WRITE.
zx_interrupt_bind() returns ZX_OK on success. In the event
of failure, a negative error value is returned.
ZX_ERR_BAD_HANDLE handle or port_handle is not a valid handle.
ZX_ERR_WRONG_TYPE handle is not an interrupt object or port_handle is not a port object.
zx_interrupt_destroy() was called on handle.
ZX_ERR_BAD_STATE A thread is waiting on the interrupt using
ZX_ERR_ACCESS_DENIED the handle handle lacks ZX_RIGHT_READ or the port_handle handle lacks ZX_RIGHT_WRITE
ZX_ERR_ALREADY_BOUND this interrupt object is already bound.
ZX_ERR_INVALID_ARGS options is not ZX_INTERRUPT_BIND or ZX_INTERRUPT_UNBIND.
ZX_ERR_NOT_FOUND the port does not match the bound port.
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Last updated 2019-11-21.