Sign in Join
FPDoc Onlineexperiment

fpSetPriority function

In unit BaseUnix

Set process priority.

Declaration

pascal
function fpSetPriority(Which: cint; Who: cint; What: cint): cint

Description

fpSetPriority sets the priority with which a process is running. Which process(es) is determined by the Which and Who variables. Which can be one of the predefined constants:

Prio_Process
Who is interpreted as process ID
Prio_PGrp
Who is interpreted as process group ID
Prio_User
Who is interpreted as user ID

Prio is a value in the range -20 to 20.

For an example, see FpNice.

The function returns zero on success, -1 on failure

Errors

Extended error information is returned by the FpGetErrno function.

sys_esrch
No process found using which and who.
sys_einval
Which was not one of Prio_Process, Prio_Grp or Prio_User.
sys_eperm
A process was found, but neither its effective or real user ID match the effective user ID of the caller.
sys_eacces
A non-superuser tried to a priority increase.

See also

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.