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Simple scheduler

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This commit is contained in:
Thomas Lovén
2018-01-10 22:28:55 +01:00
parent 1e2f81a5d8
commit 251b5f71c9
5 changed files with 50 additions and 23 deletions
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27
src/kernel/proc/thread.c
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@@ -1,14 +1,13 @@
#include <thread.h>
struct thread *threads[8];
int current_tid = -1;
int tid = 0;
#include <scheduler.h>
struct thread dummy;
struct thread *current_thread = 0;
struct thread *new_thread(void (*function)())
uint64_t tid = 1;
struct thread *new_thread(void (*function)(void))
{
struct thread *th = threads[tid] = P2V(pmm_alloc());
struct thread *th = P2V(pmm_alloc());
th->tcb.tid = tid++;
th->RBP = (uint64_t)&th->RBP2;
@@ -20,22 +19,20 @@ struct thread *new_thread(void (*function)())
void switch_thread(struct thread *old, struct thread *new)
{
current_thread = new;
swtch(&old->tcb.stack_ptr, &new->tcb.stack_ptr);
}
void yield()
{
struct thread *old, *new;
if(current_tid == -1)
old = &dummy;
old = current_thread;
if(old)
ready(old);
else
old = threads[current_tid];
current_tid++;
if(current_tid == tid)
current_tid = 0;
new = threads[current_tid];
old = &dummy;
while(!(new = scheduler_next()));
switch_thread(old, new);
}