/**
* Give the control of the CPU to another process.
*
* \note Assume the current process has been already added to a wait queue.
*
* \warning This should be considered an internal kernel function, even if it
* is allowed, usage from application code is strongly discouraged.
*/
void proc_switch(void)
{
ASSERT(proc_preemptAllowed());
ATOMIC(
preempt_reset_quantum();
proc_schedule();
);
/**
* Preempt the current task.
*/
void proc_preempt(void)
{
IRQ_ASSERT_DISABLED();
ASSERT(current_process);
/* Perform the kernel preemption */
LOG_INFO("preempting %p:%s\n", current_process, proc_currentName());
/* We are inside a IRQ context, so ATOMIC is not needed here */
SCHED_ENQUEUE(current_process);
preempt_reset_quantum();
proc_schedule();
}
void
proc_init()
{
dbg_uart_str("Proc init\n");
_proc_id = 0;
sb_init(&proc_tree);
list_init(&proc_zero_queue);
list_init(&proc_normal_queue);
list_init(&proc_normal_noticks_queue);
list_init(&proc_realtime_queue);
list_init(&init_proc_queue);
Process *init_proc = _proc_construct_init();
current_process = init_proc;
proc_schedule(); // update states
ProcScene *scene = proc_current_scene(init_proc);
scene->regs[28] = (size_t)mm_do_mmap_empty(PAGE_SIZE, USER_SPACE_SIZE - PAGE_SIZE) + PAGE_SIZE;
}
PUBLIC void clock_handle(int irq)
{
ticks++;
proc_schedule();
}