Expand description
Implementation of TaskManager
It is only used to manage processes and schedule process based on ready queue. Other CPU process monitoring functions are in Processor.
Structs
PID2PCB instance (map of pid to pcb)
TASK_MANAGER instance through lazy_static!
A array of TaskControlBlock that is thread-safe
Functions
Set a task to stop-wait status, waiting for its kernel stack out of use.
Add a task to ready queue
Fetch a task out of the ready queue
Insert item(pid, pcb) into PID2PCB map (called by do_fork AND ProcessControlBlock::new)
Get process by pid
Remove item(pid, _some_pcb) from PDI2PCB map (called by exit_current_and_run_next)
Remove a task from the ready queue
Wake up a task