baed7e1fba
Many of the member variables of the thread class aren't even used outside of the class itself, so there's no need to make those variables public. This change follows in the steps of the previous changes that made other kernel types' members private. The main motivation behind this is that the Thread class will likely change in the future as emulation becomes more accurate, and letting random bits of the emulator access data members of the Thread class directly makes it a pain to shuffle around and/or modify internals. Having all data members public like this also makes it difficult to reason about certain bits of behavior without first verifying what parts of the core actually use them. Everything being public also generally follows the tendency for changes to be introduced in completely different translation units that would otherwise be better introduced as an addition to the Thread class' public interface.
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/timer.h"
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namespace Kernel {
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WaitObject::WaitObject(KernelCore& kernel) : Object{kernel} {}
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WaitObject::~WaitObject() = default;
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void WaitObject::AddWaitingThread(SharedPtr<Thread> thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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if (itr == waiting_threads.end())
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waiting_threads.push_back(std::move(thread));
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}
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void WaitObject::RemoveWaitingThread(Thread* thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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// If a thread passed multiple handles to the same object,
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// the kernel might attempt to remove the thread from the object's
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// waiting threads list multiple times.
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if (itr != waiting_threads.end())
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waiting_threads.erase(itr);
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}
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SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
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Thread* candidate = nullptr;
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u32 candidate_priority = THREADPRIO_LOWEST + 1;
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for (const auto& thread : waiting_threads) {
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const ThreadStatus thread_status = thread->GetStatus();
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// The list of waiting threads must not contain threads that are not waiting to be awakened.
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ASSERT_MSG(thread_status == ThreadStatus::WaitSynchAny ||
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thread_status == ThreadStatus::WaitSynchAll ||
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thread_status == ThreadStatus::WaitHLEEvent,
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"Inconsistent thread statuses in waiting_threads");
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if (thread->GetPriority() >= candidate_priority)
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continue;
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if (ShouldWait(thread.get()))
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continue;
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// A thread is ready to run if it's either in ThreadStatus::WaitSynchAny or
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// in ThreadStatus::WaitSynchAll and the rest of the objects it is waiting on are ready.
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bool ready_to_run = true;
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if (thread_status == ThreadStatus::WaitSynchAll) {
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ready_to_run = thread->AllWaitObjectsReady();
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}
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if (ready_to_run) {
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candidate = thread.get();
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candidate_priority = thread->GetPriority();
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}
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}
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return candidate;
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}
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void WaitObject::WakeupWaitingThread(SharedPtr<Thread> thread) {
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ASSERT(!ShouldWait(thread.get()));
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if (!thread)
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return;
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if (!thread->IsSleepingOnWaitAll()) {
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Acquire(thread.get());
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} else {
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for (const auto& object : thread->GetWaitObjects()) {
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ASSERT(!object->ShouldWait(thread.get()));
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object->Acquire(thread.get());
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}
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}
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const std::size_t index = thread->GetWaitObjectIndex(this);
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for (const auto& object : thread->GetWaitObjects())
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object->RemoveWaitingThread(thread.get());
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thread->ClearWaitObjects();
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thread->CancelWakeupTimer();
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bool resume = true;
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if (thread->HasWakeupCallback())
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resume = thread->InvokeWakeupCallback(ThreadWakeupReason::Signal, thread, this, index);
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if (resume)
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thread->ResumeFromWait();
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}
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void WaitObject::WakeupAllWaitingThreads() {
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while (auto thread = GetHighestPriorityReadyThread()) {
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WakeupWaitingThread(thread);
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}
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}
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const std::vector<SharedPtr<Thread>>& WaitObject::GetWaitingThreads() const {
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return waiting_threads;
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}
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} // namespace Kernel
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