Prenice

Section: Oct. 1, 1991 (2)
Updated: MiNT Programmer's Manual
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NAME

Prenice - change process priority

SYNOPSIS

LONG Prenice( WORD pid, WORD delta );

DESCRIPTION

Prenice changes the base process niceness for process pid by the amount delta. Higher levels of niceness correspond to decreased priority in scheduling, so positive values for delta cause the corresponding process to be scheduled less often. Conversely, negative values for delta cause the process priority to be increased.

RETURNS

The current priority for the process, if successful. This is a 16 bit signed quantity. The default priority is 0; higher priority processes have larger priority values, lower priority ones have smaller values.

EFILNF if the indicated process does not exist (note that since this is a 32 bit negative number it can be distinguished from the WORD negative numbers returned for low priority processes)

EACCDN if the process has a different user id

BUGS

The scheduling algorithm is pretty weird, so it's hard to predict exactly what effect process priorities have.

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