/*
* Create a new raw thread object.
* Returns a null pointer if there isn't enough memory.
*/
static struct Kernel_Thread* Create_Thread(int priority, bool detached)
{
struct Kernel_Thread* kthread;
void* stackPage = 0;
/*
* For now, just allocate one page each for the thread context
* object and the thread's stack.
*/
kthread = Alloc_Page();
if (kthread != 0)
stackPage = Alloc_Page();
/* Make sure that the memory allocations succeeded. */
if (kthread == 0)
return 0;
if (stackPage == 0) {
Free_Page(kthread);
return 0;
}
/*Print("New thread @ %x, stack @ %x\n", kthread, stackPage); */
/*
* Initialize the stack pointer of the new thread
* and accounting info
*/
Init_Thread(kthread, stackPage, priority, detached);
/* Add to the list of all threads in the system. */
Add_To_Back_Of_All_Thread_List(&s_allThreadList, kthread);
return kthread;
}
void Init_Scheduler(void)
{
struct Kernel_Thread* mainThread = (struct Kernel_Thread *) KERNEL_THREAD_OBJECT;
PrintBoth("Initializing Scheduler\n");
/*
* Create initial kernel thread context object and stack,
* and make them current.
*/
Init_Thread(mainThread, (void *) KERNEL_STACK, PRIORITY_NORMAL, true);
g_currentThread = mainThread;
Add_To_Back_Of_All_Thread_List(&s_allThreadList, mainThread);
/*
* Create the idle thread.
*/
/*Print("starting idle thread\n");*/
Start_Kernel_Thread(Idle, 0, PRIORITY_IDLE, true);
/*
* Create the reaper thread.
*/
/*Print("starting reaper thread\n");*/
Start_Kernel_Thread(Reaper, 0, PRIORITY_NORMAL, true);
}
