Bind

Has the kernel set an event bit when a port, task or space needs attention.

Number	Selector	Blocking	Since
0x0A SVC_BIND	EVENT_PORT (3), EVENT_TASK (4), EVENT_SPACE (5)	no	2.0

Err Bind(EventType type, Handle ev_handle, Handle target, uint32_t bit);

Registers: (type, event, target, bit) -> r0 status

type

target

The bit is set when

EVENT_PORT

port

a caller is queued with nobody receiving

EVENT_TASK

task

the task exits or faults

EVENT_SPACE

space

the space has no live tasks left

If the condition already holds, the bit is set at once. The bit then belongs to the kernel: Signal() may not set it. An object accepts at most four bindings.

Parameters

Name	Direction	Description
type	in	EVENT_PORT, EVENT_TASK or EVENT_SPACE.
ev_handle	in	Event handle with PERM_CNTL.
target	in	Handle of the matching kind, with PERM_WAIT.
bit	in	Bit number, 0-30.

Returns

ZUZU_OK, or an error code.

Errors

Error	Condition
ERR_BADHANDLE	A handle is not live.
ERR_BADTYPE	ev_handle is not an event, or target is the wrong kind.
ERR_NOPERM	ev_handle lacks PERM_CNTL, or target lacks PERM_WAIT.
ERR_BADARG	bit is out of range, or type is unknown.
ERR_DEAD	The event or the port has died.
ERR_NOMEM	target already has four bindings.