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kern: unify all waiting semantics to use single api

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Michael Scire 2021-09-19 10:11:56 -07:00 • committed by SciresM
parent f6fb5f2c8d
commit 90732ff311
22 changed files with 904 additions and 683 deletions
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65
libraries/libmesosphere/include/mesosphere/kern_k_thread_queue.hpp
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@ -16,69 +16,28 @@
#pragma once
#include <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_thread.hpp>
#include <mesosphere/kern_select_hardware_timer.hpp>
namespace ams::kern {
class KThreadQueue {
private:
KThread::WaiterList m_wait_list;
KHardwareTimer *m_hardware_timer;
public:
constexpr ALWAYS_INLINE KThreadQueue() : m_wait_list() { /* ... */ }
constexpr ALWAYS_INLINE KThreadQueue() : m_hardware_timer(nullptr) { /* ... */ }
bool IsEmpty() const { return m_wait_list.empty(); }
constexpr void SetHardwareTimer(KHardwareTimer *timer) { m_hardware_timer = timer; }
KThread::WaiterList::iterator begin() { return m_wait_list.begin(); }
KThread::WaiterList::iterator end() { return m_wait_list.end(); }
virtual void NotifyAvailable(KThread *waiting_thread, KSynchronizationObject *signaled_object, Result wait_result);
virtual void EndWait(KThread *waiting_thread, Result wait_result);
virtual void CancelWait(KThread *waiting_thread, Result wait_result, bool cancel_timer_task);
};
bool SleepThread(KThread *t) {
KScopedSchedulerLock sl;
class KThreadQueueWithoutEndWait : public KThreadQueue {
public:
constexpr ALWAYS_INLINE KThreadQueueWithoutEndWait() : KThreadQueue() { /* ... */ }
/* If the thread needs terminating, don't enqueue it. */
if (t->IsTerminationRequested()) {
return false;
}
/* Set the thread's queue and mark it as waiting. */
t->SetSleepingQueue(this);
t->SetState(KThread::ThreadState_Waiting);
/* Add the thread to the queue. */
m_wait_list.push_back(*t);
return true;
}
void WakeupThread(KThread *t) {
KScopedSchedulerLock sl;
/* Remove the thread from the queue. */
m_wait_list.erase(m_wait_list.iterator_to(*t));
/* Mark the thread as no longer sleeping. */
t->SetState(KThread::ThreadState_Runnable);
t->SetSleepingQueue(nullptr);
}
KThread *WakeupFrontThread() {
KScopedSchedulerLock sl;
if (m_wait_list.empty()) {
return nullptr;
} else {
/* Remove the thread from the queue. */
auto it = m_wait_list.begin();
KThread *thread = std::addressof(*it);
m_wait_list.erase(it);
MESOSPHERE_ASSERT(thread->GetState() == KThread::ThreadState_Waiting);
/* Mark the thread as no longer sleeping. */
thread->SetState(KThread::ThreadState_Runnable);
thread->SetSleepingQueue(nullptr);
return thread;
}
}
virtual void EndWait(KThread *waiting_thread, Result wait_result) override final;
};
}