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[Kernel] New event signalling, better Mootex

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wheremyfoodat 2023-04-21 21:39:59 +03:00
parent 5daade05d8
commit 91e008ad1d
4 changed files with 55 additions and 27 deletions
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49
src/core/kernel/events.cpp
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@ -1,5 +1,6 @@
#include "kernel.hpp"
#include "cpu.hpp"
#include <bit>
#include <utility>
const char* Kernel::resetTypeToString(u32 type) {
@ -27,29 +28,39 @@ bool Kernel::signalEvent(Handle handle) {
Event* event = object->getData<Event>();
event->fired = true;
if (event->waitlist != 0) {
Helpers::panic("Tried to signal event with a waitlist");
// One shot events go back to being not fired once they wake up one or more thread
if (event->waitlist != 0 && event->resetType == ResetType::OneShot) {
event->fired = false;
}
/*
switch (event->resetType) {
case ResetType::OneShot:
for (int i = 0; i < threadCount; i++) {
Thread& t = threads[i];
if (t.status == ThreadStatus::WaitSync1 && t.waitList[0] == handle) {
t.status = ThreadStatus::Ready;
break;
}
else if (t.status == ThreadStatus::WaitSyncAll) {
Helpers::panic("Trying to SignalEvent when a thread is waiting on multiple objects");
}
}
break;
// Wake up every single thread in the waitlist using a bit scanning algorithm
while (event->waitlist != 0) {
const uint index = std::countr_zero(event->waitlist); // Get one of the set bits to see which thread is waiting
event->waitlist ^= (1ull << index); // Remove thread from waitlist by toggling its bit
default:
Helpers::panic("Signaled event of unimplemented type: %d", event->resetType);
// Get the thread we'll be signalling
Thread& t = threads[index];
switch (t.status) {
case ThreadStatus::WaitSync1:
t.status = ThreadStatus::Ready;
break;
case ThreadStatus::WaitSyncAny:
t.status = ThreadStatus::Ready;
// Get the index of the event in the object's waitlist, write it to r1
for (size_t i = 0; i < t.waitList.size(); i++) {
if (t.waitList[i] == handle) {
t.gprs[1] = i;
break;
}
}
break;
case ThreadStatus::WaitSyncAll:
Helpers::panic("SignalEvent: Thread on WaitSyncAll");
break;
}
}
*/
return true;
}