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hle: kernel: KScheduler: Introduce thread context_guard.

master
bunnei 2021-01-20 16:47:57 +07:00
parent cdd14b03e5
commit ca78f77827
2 changed files with 16 additions and 3 deletions
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18
src/core/hle/kernel/k_scheduler.cpp
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@ -668,6 +668,7 @@ void KScheduler::Unload(KThread* thread) {
} else {
prev_thread = nullptr;
}
thread->context_guard.unlock();
}
}
@ -700,15 +701,23 @@ void KScheduler::SwitchContextStep2() {
void KScheduler::ScheduleImpl() {
KThread* previous_thread = current_thread;
current_thread = state.highest_priority_thread;
KThread* next_thread = state.highest_priority_thread;
state.needs_scheduling = false;
if (current_thread == previous_thread) {
// 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 we're not actually switching thread, there's nothing to do.
if (next_thread == current_thread) {
guard.unlock();
return;
}
current_thread = next_thread;
Process* const previous_process = system.Kernel().CurrentProcess();
UpdateLastContextSwitchTime(previous_thread, previous_process);
@ -748,10 +757,13 @@ void KScheduler::SwitchToCurrent() {
};
do {
if (current_thread != nullptr) {
current_thread->context_guard.lock();
if (current_thread->GetRawState() != ThreadState::Runnable) {
current_thread->context_guard.unlock();
break;
}
if (static_cast<u32>(current_thread->GetActiveCore()) != core_id) {
if (current_thread->GetActiveCore() != core_id) {
current_thread->context_guard.unlock();
break;
}
}

1
src/core/hle/kernel/k_thread.h
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@ -712,6 +712,7 @@ private:
s8 priority_inheritance_count{};
bool resource_limit_release_hint{};
StackParameters stack_parameters{};
Common::SpinLock context_guard{};
// For emulation
std::shared_ptr<Common::Fiber> host_context{};