void kmain(s64 magic, s64 info)
{
//vga_clear(COLOR_BLACK);
idt_init();
isr_init();
serial_init();
set_debug_traps();
BREAKPOINT();
cpuid_print();
multiboot(magic, info);
kmem_map();
page_init();
kmalloc_init();
//vesa_init();
root_init();
pci_init();
vm_init();
syscall_init();
timer_init();
kbd_init();
//mouse_init();
console_init();
create_kthread(NULL, idle_thread, THREAD_PRI_LOW, NULL, NULL);
create_kthread(NULL, init_thread, THREAD_PRI_NORMAL, NULL, NULL);
thread_schedule();
}
void down(sem_t* sem)
{
assert(thread_current != NULL);
PUSIF();
spin_lock(&sem->lock);
if (sem->flag)// 有多余的资源,直接退出
{
sem->flag = 0;
spin_unlock(&sem->lock);
}
else
{
DListAddTail(&sem->wait_list, &thread_current->run_node);
//list_append_tail(&sem->wait_list, thread_current);
spin_unlock(&sem->lock);
thread_current->wait_sem = sem;
thread_schedule();
}
POPIF();
}
int
main(int argc, char *argv[])
{
thread_init();
thread_create(mythread);
thread_create(mythread);
thread_schedule();
return 0;
}
static void
mythread(void)
{
int i;
printf(1, "my thread running\n");
for (i = 0; i < 100; i++) {
printf(1, "my thread 0x%x\n", (int) current_thread);
thread_yield();
}
printf(1, "my thread: exit\n");
current_thread->state = FREE;
thread_schedule();
}
/*
* 内核主函数
*/
void kernel_main()
{
char *str = "\n\nGreenLeafOS version 0.01.\n";
print(str);
kernel_stack_top = (u32*)&tss.esp0;
kernel_reenter = 0;
thread_init();
main_thread_create();
thread_schedule();
restart();
while(1);
}
void thread_exit()
{
spin_lock(&thread_current->lock);
process_t* proc = thread_current->process;
if(proc)
{
__sync_sub_and_fetch(&proc->thread_cnt, 1);
if(proc->thread_cnt == 0)
{
ProcessFree(proc);
}
}
kmfree(thread_current->kstack_start);
kmfree(thread_current);
thread_current = NULL;
thread_schedule();
// spin_unlock(&thread_current->lock);
}
void
thread_yield(void)
{
current_thread->state = RUNNABLE;
thread_schedule();
}