322
edits
Changes
Jump to navigation
Jump to search
Line 89:
Line 89: + + + + + + + + + + + + + + + + + + + + + +
added a section on time
== Memory allocation ==
== Memory allocation ==
3 types of heaps exist: EXPH (exponential heap), FRMH (frame heap), and UNTH (unit heap).
3 types of heaps exist: EXPH (exponential heap), FRMH (frame heap), and UNTH (unit heap).
== Time ==
Time is kept with timers 2 and 3, while alarm interrupts are handled by timer 1; timer 0 is presumably reserved for the DMA sound channels. The OS orders the alarms by alert time, so that it only needs to keep track of the frontmost alarm.
<pre>
struct OSAlarm {
void (*handler)(void *userData);
void *userData;
u32 unknown;
u64 alertTime;
struct OSAlarm *prev;
struct OSAlarm *next;
u64 repeatInterval; // 0 for non-repeating alarms
u64 repeatStart; // undefined value for non-repeating alarms
}
struct OSAlarmQueue {
u32 unknown;
struct OSAlarm *head;
struct OSAlarm *tail;
}
</pre>