New MiNT system calls: Pgetpriority()

Pgetpriority()

LONG Pgetpriority(which, who)

WORD which;
WORD who;

Pgetpriority() gets the current priority value for a process.

Opcode 344 (0x0158)

Availability Available when a MiNT kernel of a version at least 1.15.0 release is detected.

Parameters Pgetpriority() gets the priority of the processes specified by which and who. The interpretation of parameter who depends on which:
PRIO_PROCESS (0) reads the priority of process with process id who. A who of 0 implies the process id of the calling process.

PRIO_PGRP (1) reads the priority of the process group with process group id who. If the priorities of the process differ, the lowest valued priority (i. e. the highest CPU usage priority) is returned. A who of 0 implies the process group id of the calling process.

PRIO_USER (2) reads the priority of the process of the user with user id who. For multiple processes the lowest valued priority is returned. A who of 0 implies the user id of the calling process.

Binding
move.w who,-(sp) move.w which,-(sp) move.w #$0158,-(sp) trap #1 addq.l #6,sp

Return Value Return value is either a negative error number in case of failure or the requested priority + 20 on success.

Comments Library functions should first check for an error condition and then decrement the returned value by 20.
This call makes calls Pnice() and Prenice() obsolete.

See Also Psetpriority()

	Pgetpriority() gets the current priority value for a process.

Opcode	344 (0x0158)

Availability	Available when a MiNT kernel of a version at least 1.15.0 release is detected.

Parameters	Pgetpriority() gets the priority of the processes specified by *which* and *who. The interpretation of parameter who* depends on *which: PRIO_PROCESS* (0) reads the priority of process with process id who. A *who* of 0 implies the process id of the calling process. PRIO_PGRP (1) reads the priority of the process group with process group id who. If the priorities of the process differ, the lowest valued priority (i. e. the highest CPU usage priority) is returned. A *who* of 0 implies the process group id of the calling process. PRIO_USER (2) reads the priority of the process of the user with user id who. For multiple processes the lowest valued priority is returned. A *who* of 0 implies the user id of the calling process.

Binding	move.w who,-(sp) move.w which,-(sp) move.w #$0158,-(sp) trap #1 addq.l #6,sp

Return Value	Return value is either a negative error number in case of failure or the requested priority + 20 on success.

Comments	Library functions should first check for an error condition and then decrement the returned value by 20. This call makes calls Pnice() and Prenice() obsolete.

See Also	Psetpriority()