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authorbunnei <bunneidev@gmail.com>2022-01-27 21:17:14 +0100
committerbunnei <bunneidev@gmail.com>2022-01-27 21:17:14 +0100
commit3a1a3dd0db4256eef6382706c84c7b908b48bccd (patch)
treec042cfa45d8c043371e7e41d16ec619be5ed5803 /src/core/hle/kernel/k_scheduler.cpp
parentMerge pull request #7783 from lioncash/abi-cexpr (diff)
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Diffstat (limited to 'src/core/hle/kernel/k_scheduler.cpp')
-rw-r--r--src/core/hle/kernel/k_scheduler.cpp45
1 files changed, 23 insertions, 22 deletions
diff --git a/src/core/hle/kernel/k_scheduler.cpp b/src/core/hle/kernel/k_scheduler.cpp
index b32d4f285..c96520828 100644
--- a/src/core/hle/kernel/k_scheduler.cpp
+++ b/src/core/hle/kernel/k_scheduler.cpp
@@ -710,23 +710,19 @@ void KScheduler::Unload(KThread* thread) {
}
void KScheduler::Reload(KThread* thread) {
- LOG_TRACE(Kernel, "core {}, reload thread {}", core_id, thread ? thread->GetName() : "nullptr");
+ LOG_TRACE(Kernel, "core {}, reload thread {}", core_id, thread->GetName());
- if (thread) {
- ASSERT_MSG(thread->GetState() == ThreadState::Runnable, "Thread must be runnable.");
-
- Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
- cpu_core.LoadContext(thread->GetContext32());
- cpu_core.LoadContext(thread->GetContext64());
- cpu_core.SetTlsAddress(thread->GetTLSAddress());
- cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0());
- cpu_core.ClearExclusiveState();
- }
+ Core::ARM_Interface& cpu_core = system.ArmInterface(core_id);
+ cpu_core.LoadContext(thread->GetContext32());
+ cpu_core.LoadContext(thread->GetContext64());
+ cpu_core.SetTlsAddress(thread->GetTLSAddress());
+ cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0());
+ cpu_core.ClearExclusiveState();
}
void KScheduler::SwitchContextStep2() {
// Load context of new thread
- Reload(current_thread.load());
+ Reload(GetCurrentThread());
RescheduleCurrentCore();
}
@@ -735,13 +731,17 @@ void KScheduler::ScheduleImpl() {
KThread* previous_thread = GetCurrentThread();
KThread* next_thread = state.highest_priority_thread;
- state.needs_scheduling = false;
+ state.needs_scheduling.store(false);
// We never want to schedule a null thread, so use the idle thread if we don't have a next.
if (next_thread == nullptr) {
next_thread = idle_thread;
}
+ if (next_thread->GetCurrentCore() != core_id) {
+ next_thread->SetCurrentCore(core_id);
+ }
+
// We never want to schedule a dummy thread, as these are only used by host threads for locking.
if (next_thread->GetThreadType() == ThreadType::Dummy) {
ASSERT_MSG(false, "Dummy threads should never be scheduled!");
@@ -755,14 +755,8 @@ void KScheduler::ScheduleImpl() {
return;
}
- if (next_thread->GetCurrentCore() != core_id) {
- next_thread->SetCurrentCore(core_id);
- }
-
- current_thread.store(next_thread);
-
+ // Update the CPU time tracking variables.
KProcess* const previous_process = system.Kernel().CurrentProcess();
-
UpdateLastContextSwitchTime(previous_thread, previous_process);
// Save context for previous thread
@@ -770,6 +764,10 @@ void KScheduler::ScheduleImpl() {
std::shared_ptr<Common::Fiber>* old_context;
old_context = &previous_thread->GetHostContext();
+
+ // Set the new thread.
+ current_thread.store(next_thread);
+
guard.Unlock();
Common::Fiber::YieldTo(*old_context, *switch_fiber);
@@ -797,8 +795,8 @@ void KScheduler::SwitchToCurrent() {
do {
auto next_thread = current_thread.load();
if (next_thread != nullptr) {
- next_thread->context_guard.Lock();
- if (next_thread->GetRawState() != ThreadState::Runnable) {
+ const auto locked = next_thread->context_guard.TryLock();
+ if (state.needs_scheduling.load()) {
next_thread->context_guard.Unlock();
break;
}
@@ -806,6 +804,9 @@ void KScheduler::SwitchToCurrent() {
next_thread->context_guard.Unlock();
break;
}
+ if (!locked) {
+ continue;
+ }
}
auto thread = next_thread ? next_thread : idle_thread;
Common::Fiber::YieldTo(switch_fiber, *thread->GetHostContext());