Process Management API

Functions
syscall	create (void *, ulong, ulong, char *, ulong,...)
syscall	ready (long, bool)
syscall	resched (void)
syscall	sleep (int n)

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Function Documentation

syscall create	(	void *	procaddr,
		ulong	ssize,
		ulong	priority,
		char *	name,
		ulong	nargs,
			...
	)

Create a process to start running a procedure.

Parameters:

procaddr	procedure address
ssize	stack stack size in words
priority	process priority
name	name of the process, used for debugging
nargs	number of arguments that follow

Returns:

the new process' process id

syscall ready	(	long	pid,
		bool	resch
	)

Make a process eligible for CPU service.

Parameters:

pid	process id of the process to move to the ready state
resch	if TRUE, reschedule will be called

Returns:

OK if the process has been added to the ready list, else SYSERR

syscall resched

(

void

)

Reschedule processor to next ready process.

Upon entry, currpid gives current process id. Proctab[currpid].pstate gives correct NEXT state for current process if other than PRREADY.

Returns:

OK when the process is context switched back

syscall sleep

(

int

ms

)

Delay the calling process n milliseconds.

Parameters:

ms	number of milliseconds to sleep

Returns:

OK if process is sleeping, SYSERR if no clock