Kernel threads. More...

#include <core/system.h>
#include <core/arch.h>
#include <core/panic.h>
#include <core/string.h>
#include <mm/vm.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <ds/queue.h>

Functions
static int	kproc_init (void)
	Makes process 0, the kernel threads' process, the first time a kernel thread is made.
static void	kthread_start (void)
	Runs a kernel thread's function: every kernel thread starts here, on its own stack (arch_kthread_create()).
int	kthread_create (const char name, void(fn)(void ), void arg, struct thread **ref)
	Makes a kernel thread, and makes it ready to run.

Variables
struct proc *	kproc

Detailed Description

Kernel threads.

Kernel threads are the threads of process 0, "[kernel]", as on the BSDs. They run kernel functions on their kernel stacks, in the kernel's address space, and are scheduled like any other thread. Process 0 has no parent, has its own session and process group, and takes no signals.

Definition in file kthread.c.

Function Documentation

◆ kproc_init()

int kproc_init ( void )

static

Makes process 0, the kernel threads' process, the first time a kernel thread is made.

Returns 0, or -ENOMEM.

Definition at line 27 of file kthread.c.

References kmalloc(), kproc, kproc_init(), kvm_space, M_ZERO, proc::name, panic, proc::pid, vm_space::pmap, procs, proc::running, session_new(), SIG_DFL, SIG_MAX, proc::sigaction, and proc::vm_space.

Referenced by kproc_init(), and kthread_create().

◆ kthread_create()

int kthread_create	(	const char *	name,
		void(*	fn )(void *),
		void *	arg,
		struct thread **	ref )

Makes a kernel thread, and makes it ready to run.

Parameters

name	the thread's name, as ps shows it ("[net]")
fn	the function it runs, which must never return
arg	the argument fn is called with
ref	if not NULL, set to the new thread