mach_port_set_seqno

Function - Change the current value of the target port's sequence number.

SYNOPSIS

kern_return_t   mach_port_set_seqno
                (ipc_space_t                               task,
                 mach_port_name_t                          name,
                 mach_port_seqno_t                        seqno);

PARAMETERS

task

[in task send right] The task owning the receive right.

name

[in scalar] task's name for the receive right.

seqno

[in scalar] The sequence number that the next message received from the port will have.

DESCRIPTION

The mach_port_set_seqno function changes the sequence number of task's receive right named name.

(Each port is associated with a sequence number attribute that can be used to track the order in which messages sent to the port are received. A port's sequence number is initially set to zero and is incremented each time a message is received from the port. A port's sequence number is automatically reset to zero each time the port's receive right migrates.)

NOTES

This interface is machine word length specific because of the port name parameter.

RETURN VALUES

KERN_INVALID_NAME

name did not denote a right.

KERN_INVALID_RIGHT

name denoted a right, but not a receive right.

RELATED INFORMATION

Functions: mach_port_get_attributes.