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https://github.com/yuzu-mirror/yuzu.git
synced 2024-09-08 05:59:08 +01:00
WaitSynch: Removed unused variables and reduced SharedPtr copies.
Define a variable with the value of the sync timeout error code. Use a boost::flat_map instead of an unordered_map to hold the equivalence of objects and wait indices in a WaitSynchN call.
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7cde5b83bc
commit
17b29d8865
5 changed files with 63 additions and 80 deletions
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@ -230,7 +230,7 @@ std::vector<std::unique_ptr<WaitTreeItem>> WaitTreeThread::GetChildren() const {
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list.push_back(std::make_unique<WaitTreeMutexList>(thread.held_mutexes));
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}
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if (thread.status == THREADSTATUS_WAIT_SYNCH) {
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list.push_back(std::make_unique<WaitTreeObjectList>(thread.wait_objects, thread.IsWaitingAll()));
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list.push_back(std::make_unique<WaitTreeObjectList>(thread.wait_objects, thread.IsSleepingOnWaitAll()));
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}
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return list;
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@ -34,14 +34,11 @@ void WaitObject::RemoveWaitingThread(Thread* thread) {
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SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
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// Remove the threads that are ready or already running from our waitlist
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boost::range::remove_erase_if(waiting_threads, [](const SharedPtr<Thread>& thread) -> bool {
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boost::range::remove_erase_if(waiting_threads, [](const SharedPtr<Thread>& thread) {
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return thread->status == THREADSTATUS_RUNNING || thread->status == THREADSTATUS_READY;
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});
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if (waiting_threads.empty())
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return nullptr;
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SharedPtr<Thread> candidate = nullptr;
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Thread* candidate = nullptr;
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s32 candidate_priority = THREADPRIO_LOWEST + 1;
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for (const auto& thread : waiting_threads) {
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@ -52,7 +49,7 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
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return object->ShouldWait();
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});
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if (ready_to_run) {
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candidate = thread;
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candidate = thread.get();
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candidate_priority = thread->current_priority;
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}
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}
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@ -61,9 +58,8 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
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}
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void WaitObject::WakeupAllWaitingThreads() {
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// Wake up all threads that can be awoken, in priority order
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while (auto thread = GetHighestPriorityReadyThread()) {
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if (thread->wait_objects.empty()) {
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if (!thread->IsSleepingOnWaitAll()) {
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Acquire();
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// Set the output index of the WaitSynchronizationN call to the index of this object.
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if (thread->wait_set_output) {
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@ -73,7 +69,6 @@ void WaitObject::WakeupAllWaitingThreads() {
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} else {
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for (auto object : thread->wait_objects) {
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object->Acquire();
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// Remove the thread from the object's waitlist
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object->RemoveWaitingThread(thread.get());
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}
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// Note: This case doesn't update the output index of WaitSynchronizationN.
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@ -81,7 +76,6 @@ void WaitObject::WakeupAllWaitingThreads() {
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thread->wait_objects.clear();
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}
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// Set the result of the call to WaitSynchronization to RESULT_SUCCESS
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thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
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thread->ResumeFromWait();
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// Note: Removing the thread from the object's waitlist will be done by GetHighestPriorityReadyThread
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@ -152,7 +152,10 @@ public:
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*/
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void RemoveWaitingThread(Thread* thread);
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/// Wake up all threads waiting on this object
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/**
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* Wake up all threads waiting on this object that can be awoken, in priority order,
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* and set the synchronization result and output of the thread.
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*/
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void WakeupAllWaitingThreads();
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/// Obtains the highest priority thread that is ready to run from this object's waiting list.
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@ -7,6 +7,7 @@
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <boost/container/flat_map.hpp>
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#include <boost/container/flat_set.hpp>
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#include "common/common_types.h"
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#include "core/core.h"
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@ -153,7 +154,7 @@ public:
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* its wait list to become ready, as a result of a WaitSynchronizationN call
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* with wait_all = true, or a ReplyAndReceive call.
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*/
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bool IsWaitingAll() const {
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bool IsSleepingOnWaitAll() const {
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return !wait_objects.empty();
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}
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@ -183,7 +184,7 @@ public:
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/// This is only populated when the thread should wait for all the objects to become ready.
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std::vector<SharedPtr<WaitObject>> wait_objects;
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std::unordered_map<int, s32> wait_objects_index; ///< Mapping of Object ids to their position in the last waitlist that this object waited on.
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boost::container::flat_map<int, s32> wait_objects_index; ///< Mapping of Object ids to their position in the last waitlist that this object waited on.
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VAddr wait_address; ///< If waiting on an AddressArbiter, this is the arbitration address
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@ -41,6 +41,9 @@ const ResultCode ERR_PORT_NAME_TOO_LONG(ErrorDescription(30), ErrorModule::OS,
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ErrorSummary::InvalidArgument,
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ErrorLevel::Usage); // 0xE0E0181E
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const ResultCode ERR_SYNC_TIMEOUT(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged, ErrorLevel::Info);
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const ResultCode ERR_MISALIGNED_ADDRESS{// 0xE0E01BF1
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ErrorDescription::MisalignedAddress, ErrorModule::OS,
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ErrorSummary::InvalidArgument, ErrorLevel::Usage};
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@ -257,11 +260,8 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
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if (object->ShouldWait()) {
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if (nano_seconds == 0) {
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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}
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if (nano_seconds == 0)
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return ERR_SYNC_TIMEOUT;
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object->AddWaitingThread(thread);
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// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
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@ -273,9 +273,7 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
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// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in its wait objects.
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// Otherwise we retain the default value of timeout.
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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return ERR_SYNC_TIMEOUT;
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}
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object->Acquire();
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@ -286,8 +284,6 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
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/// Wait for the given handles to synchronize, timeout after the specified nanoseconds
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static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_count, bool wait_all,
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s64 nano_seconds) {
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bool wait_thread = !wait_all;
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int handle_index = 0;
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Kernel::Thread* thread = Kernel::GetCurrentThread();
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// Check if 'handles' is invalid
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@ -305,7 +301,6 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
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ErrorSummary::InvalidArgument, ErrorLevel::Usage);
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using ObjectPtr = Kernel::SharedPtr<Kernel::WaitObject>;
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std::vector<ObjectPtr> objects(handle_count);
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for (int i = 0; i < handle_count; ++i) {
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@ -320,15 +315,53 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
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// It will be repopulated later in the wait_all = false case.
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thread->wait_objects_index.clear();
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if (!wait_all) {
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// Find the first object that is acquireable in the provided list of objects
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if (wait_all) {
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bool all_available = std::all_of(objects.begin(), objects.end(), [](const ObjectPtr& object) {
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return !object->ShouldWait();
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});
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if (all_available) {
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// We can acquire all objects right now, do so.
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for (auto object : objects)
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object->Acquire();
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// Note: In this case, the `out` parameter is not set, and retains whatever value it had before.
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return RESULT_SUCCESS;
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}
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// Not all objects were available right now, prepare to suspend the thread.
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// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
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if (nano_seconds == 0)
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return ERR_SYNC_TIMEOUT;
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// Put the thread to sleep
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thread->status = THREADSTATUS_WAIT_SYNCH;
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// Add the thread to each of the objects' waiting threads.
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for (auto& object : objects) {
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object->AddWaitingThread(thread);
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// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
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// Currently this is done in Mutex::ShouldWait, but it should be moved to a function that is called from here.
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}
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// Set the thread's waitlist to the list of objects passed to WaitSynchronizationN
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thread->wait_objects = std::move(objects);
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// Create an event to wake the thread up after the specified nanosecond delay has passed
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thread->WakeAfterDelay(nano_seconds);
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// This value gets set to -1 by default in this case, it is not modified after this.
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*out = -1;
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// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in one of its wait objects.
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return ERR_SYNC_TIMEOUT;
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} else {
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// Find the first object that is acquirable in the provided list of objects
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auto itr = std::find_if(objects.begin(), objects.end(), [](const ObjectPtr& object) {
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return !object->ShouldWait();
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});
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if (itr != objects.end()) {
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// We found a ready object, acquire it and set the result value
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ObjectPtr object = *itr;
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Kernel::WaitObject* object = itr->get();
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object->Acquire();
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*out = std::distance(objects.begin(), itr);
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return RESULT_SUCCESS;
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@ -337,11 +370,8 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
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// No objects were ready to be acquired, prepare to suspend the thread.
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// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
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if (nano_seconds == 0) {
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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}
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if (nano_seconds == 0)
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return ERR_SYNC_TIMEOUT;
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// Put the thread to sleep
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thread->status = THREADSTATUS_WAIT_SYNCH;
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@ -351,7 +381,7 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
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// Add the thread to each of the objects' waiting threads.
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for (size_t i = 0; i < objects.size(); ++i) {
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ObjectPtr object = objects[i];
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Kernel::WaitObject* object = objects[i].get();
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// Set the index of this object in the mapping of Objects -> index for this thread.
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thread->wait_objects_index[object->GetObjectId()] = static_cast<int>(i);
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object->AddWaitingThread(thread);
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@ -368,52 +398,7 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
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// Otherwise we retain the default value of timeout, and -1 in the out parameter
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thread->wait_set_output = true;
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*out = -1;
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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} else {
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bool all_available = std::all_of(objects.begin(), objects.end(), [](const ObjectPtr& object) {
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return !object->ShouldWait();
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});
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if (all_available) {
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// We can acquire all objects right now, do so.
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for (auto object : objects)
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object->Acquire();
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// Note: In this case, the `out` parameter is not set, and retains whatever value it had before.
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return RESULT_SUCCESS;
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}
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// Not all objects were available right now, prepare to suspend the thread.
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// If a timeout value of 0 was provided, just return the Timeout error code instead of suspending the thread.
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if (nano_seconds == 0) {
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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}
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// Put the thread to sleep
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thread->status = THREADSTATUS_WAIT_SYNCH;
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// Set the thread's waitlist to the list of objects passed to WaitSynchronizationN
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thread->wait_objects = objects;
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// Add the thread to each of the objects' waiting threads.
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for (auto object : objects) {
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object->AddWaitingThread(thread);
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// TODO(Subv): Perform things like update the mutex lock owner's priority to prevent priority inversion.
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// Currently this is done in Mutex::ShouldWait, but it should be moved to a function that is called from here.
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}
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// Create an event to wake the thread up after the specified nanosecond delay has passed
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thread->WakeAfterDelay(nano_seconds);
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// This value gets set to -1 by default in this case, it is not modified after this.
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*out = -1;
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// Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a signal in one of its wait objects.
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return ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged,
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ErrorLevel::Info);
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return ERR_SYNC_TIMEOUT;
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}
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}
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