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Add thread and process states.

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Add a thread exit call.
This commit is contained in:
Drew Galbraith 2023-05-29 13:51:00 -07:00
parent 8d87791fa2
commit a06c9dced4
8 changed files with 78 additions and 9 deletions
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25
zion/scheduler/scheduler.cpp
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@ -34,6 +34,15 @@ class ProcList {
};
}
void DumpProcessStates() {
ProcEntry* p = front_;
dbgln("Process States:");
while (p != nullptr) {
dbgln("%u: %u", p->proc->id(), p->proc->GetState());
p = p->next;
}
}
private:
struct ProcEntry {
Process* proc;
@ -71,16 +80,26 @@ class Scheduler {
asm volatile("cli");
if (current_thread_->next_thread_ == nullptr) {
dbgln("No next thread, continue");
return;
if (current_thread_->GetState() == Thread::RUNNING) {
dbgln("No next thread, continue");
return;
} else {
proc_list_.DumpProcessStates();
panic("FIXME: Implement Sleep");
}
}
Thread* prev = current_thread_;
current_thread_ = current_thread_->next_thread_;
prev->next_thread_ = nullptr;
if (prev->pid() != 0) {
if (prev->pid() != 0 && prev->GetState() == Thread::RUNNING) {
prev->SetState(Thread::RUNNABLE);
Enqueue(prev);
}
if (current_thread_->GetState() != Thread::RUNNABLE) {
panic("Non-runnable thread in the queue");
}
current_thread_->SetState(Thread::RUNNING);
context_switch(prev->Rsp0Ptr(), current_thread_->Rsp0Ptr());
asm volatile("sti");