christoph/lecture-operating-system-development
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This commit is contained in:
Christoph Urlacher
2022-07-04 22:05:07 +02:00
parent 19ab6fef06
commit 51390ef277
10 changed files with 52 additions and 47 deletions
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20
c_os/kernel/threads/Scheduler.cc
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@ -24,8 +24,8 @@ void Scheduler::schedule() {
// We need to start the idle thread first as this one sets the scheduler to initialized
// Other wise preemption will be blocked and nothing will happen if the first threads
// ready() function is blocking
this->start(*(Thread*)new IdleThread()); // The idle thread set initialized to true, so preemption
// only starts after this
this->start(*(Thread*)new IdleThread()); // The idle thread set initialized to true, so preemption
// only starts after this
}
/*****************************************************************************
@ -41,12 +41,12 @@ void Scheduler::ready(Thread* that) {
/* hier muss Code eingefuegt werden */
// Thread-Wechsel durch PIT verhindern
cpu.disable_int ();
cpu.disable_int();
this->readyQueue.enqueue(that);
// Thread-Wechsel durch PIT jetzt wieder erlauben
cpu.enable_int ();
cpu.enable_int();
}
/*****************************************************************************
@ -62,7 +62,7 @@ void Scheduler::exit() {
/* hier muss Code eingefuegt werden */
// Thread-Wechsel durch PIT verhindern
cpu.disable_int ();
cpu.disable_int();
Thread& next = *(Thread*)this->readyQueue.dequeue();
this->dispatch(next);
@ -87,12 +87,12 @@ void Scheduler::kill(Thread* that) {
/* hier muss Code eingefuegt werden */
// Thread-Wechsel durch PIT verhindern
cpu.disable_int ();
cpu.disable_int();
this->readyQueue.remove(that);
// Thread-Wechsel durch PIT jetzt wieder erlauben
cpu.enable_int ();
cpu.enable_int();
}
/*****************************************************************************
@ -118,7 +118,7 @@ void Scheduler::yield() {
}
// Thread-Wechsel durch PIT verhindern
cpu.disable_int ();
cpu.disable_int();
Thread& next = *(Thread*)this->readyQueue.dequeue();
this->readyQueue.enqueue(this->get_active());
@ -132,7 +132,7 @@ void Scheduler::yield() {
* schaltet auf den naechsten Thread um, sofern einer vor- *
* handen ist. *
*****************************************************************************/
void Scheduler::preempt () {
void Scheduler::preempt() {
/* Hier muss Code eingefuegt werden */
@ -142,7 +142,7 @@ void Scheduler::preempt () {
}
// Thread-Wechsel durch PIT verhindern
cpu.disable_int ();
cpu.disable_int();
Thread& next = *(Thread*)this->readyQueue.dequeue();
this->readyQueue.enqueue(this->get_active());