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Merge pull request #2416 from lioncash/wait

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kernel/svc: Clean up wait synchronization related functionality
This commit is contained in:
bunnei
2019-04-24 22:56:08 -04:00
committed by GitHub
parent 94db649205 c268ffd831
commit 78574e7a47
7 changed files with 54 additions and 51 deletions
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3
src/core/hle/kernel/kernel.cpp
View File

@@ -46,8 +46,7 @@ static void ThreadWakeupCallback(u64 thread_handle, [[maybe_unused]] s64 cycles_
bool resume = true;
if (thread->GetStatus() == ThreadStatus::WaitSynchAny ||
thread->GetStatus() == ThreadStatus::WaitSynchAll ||
if (thread->GetStatus() == ThreadStatus::WaitSynch ||
thread->GetStatus() == ThreadStatus::WaitHLEEvent) {
// Remove the thread from each of its waiting objects' waitlists
for (const auto& object : thread->GetWaitObjects()) {

3
src/core/hle/kernel/process.cpp
View File

@@ -147,8 +147,7 @@ void Process::PrepareForTermination() {
continue;
// TODO(Subv): When are the other running/ready threads terminated?
ASSERT_MSG(thread->GetStatus() == ThreadStatus::WaitSynchAny ||
thread->GetStatus() == ThreadStatus::WaitSynchAll,
ASSERT_MSG(thread->GetStatus() == ThreadStatus::WaitSynch,
"Exiting processes with non-waiting threads is currently unimplemented");
thread->Stop();

10
src/core/hle/kernel/svc.cpp
View File

@@ -424,7 +424,7 @@ static ResultCode GetProcessId(Core::System& system, u64* process_id, Handle han
/// Default thread wakeup callback for WaitSynchronization
static bool DefaultThreadWakeupCallback(ThreadWakeupReason reason, SharedPtr<Thread> thread,
SharedPtr<WaitObject> object, std::size_t index) {
ASSERT(thread->GetStatus() == ThreadStatus::WaitSynchAny);
ASSERT(thread->GetStatus() == ThreadStatus::WaitSynch);
if (reason == ThreadWakeupReason::Timeout) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
@@ -502,7 +502,7 @@ static ResultCode WaitSynchronization(Core::System& system, Handle* index, VAddr
}
thread->SetWaitObjects(std::move(objects));
thread->SetStatus(ThreadStatus::WaitSynchAny);
thread->SetStatus(ThreadStatus::WaitSynch);
// Create an event to wake the thread up after the specified nanosecond delay has passed
thread->WakeAfterDelay(nano_seconds);
@@ -518,16 +518,14 @@ static ResultCode CancelSynchronization(Core::System& system, Handle thread_hand
LOG_TRACE(Kernel_SVC, "called thread=0x{:X}", thread_handle);
const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
const SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);
SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);
if (!thread) {
LOG_ERROR(Kernel_SVC, "Thread handle does not exist, thread_handle=0x{:08X}",
thread_handle);
return ERR_INVALID_HANDLE;
}
ASSERT(thread->GetStatus() == ThreadStatus::WaitSynchAny);
thread->SetWaitSynchronizationResult(ERR_SYNCHRONIZATION_CANCELED);
thread->ResumeFromWait();
thread->CancelWait();
return RESULT_SUCCESS;
}

9
src/core/hle/kernel/thread.cpp
View File

@@ -101,8 +101,7 @@ void Thread::ResumeFromWait() {
ASSERT_MSG(wait_objects.empty(), "Thread is waking up while waiting for objects");
switch (status) {
case ThreadStatus::WaitSynchAll:
case ThreadStatus::WaitSynchAny:
case ThreadStatus::WaitSynch:
case ThreadStatus::WaitHLEEvent:
case ThreadStatus::WaitSleep:
case ThreadStatus::WaitIPC:
@@ -142,6 +141,12 @@ void Thread::ResumeFromWait() {
ChangeScheduler();
}
void Thread::CancelWait() {
ASSERT(GetStatus() == ThreadStatus::WaitSynch);
SetWaitSynchronizationResult(ERR_SYNCHRONIZATION_CANCELED);
ResumeFromWait();
}
/**
* Resets a thread context, making it ready to be scheduled and run by the CPU
* @param context Thread context to reset

40
src/core/hle/kernel/thread.h
View File

@@ -49,8 +49,7 @@ enum class ThreadStatus {
WaitHLEEvent, ///< Waiting for hle event to finish
WaitSleep, ///< Waiting due to a SleepThread SVC
WaitIPC, ///< Waiting for the reply from an IPC request
WaitSynchAny, ///< Waiting due to WaitSynch1 or WaitSynchN with wait_all = false
WaitSynchAll, ///< Waiting due to WaitSynchronizationN with wait_all = true
WaitSynch, ///< Waiting due to WaitSynchronization
WaitMutex, ///< Waiting due to an ArbitrateLock svc
WaitCondVar, ///< Waiting due to an WaitProcessWideKey svc
WaitArb, ///< Waiting due to a SignalToAddress/WaitForAddress svc
@@ -169,11 +168,17 @@ public:
return tls_memory;
}
/**
* Resumes a thread from waiting
*/
/// Resumes a thread from waiting
void ResumeFromWait();
/// Cancels a waiting operation that this thread may or may not be within.
///
/// When the thread is within a waiting state, this will set the thread's
/// waiting result to signal a canceled wait. The function will then resume
/// this thread.
///
void CancelWait();
/**
* Schedules an event to wake up the specified thread after the specified delay
* @param nanoseconds The time this thread will be allowed to sleep for
@@ -184,24 +189,27 @@ public:
void CancelWakeupTimer();
/**
* Sets the result after the thread awakens (from either WaitSynchronization SVC)
* Sets the result after the thread awakens (from svcWaitSynchronization)
* @param result Value to set to the returned result
*/
void SetWaitSynchronizationResult(ResultCode result);
/**
* Sets the output parameter value after the thread awakens (from WaitSynchronizationN SVC only)
* Sets the output parameter value after the thread awakens (from svcWaitSynchronization)
* @param output Value to set to the output parameter
*/
void SetWaitSynchronizationOutput(s32 output);
/**
* Retrieves the index that this particular object occupies in the list of objects
* that the thread passed to WaitSynchronizationN, starting the search from the last element.
* It is used to set the output value of WaitSynchronizationN when the thread is awakened.
* that the thread passed to WaitSynchronization, starting the search from the last element.
*
* It is used to set the output index of WaitSynchronization when the thread is awakened.
*
* When a thread wakes up due to an object signal, the kernel will use the index of the last
* matching object in the wait objects list in case of having multiple instances of the same
* object in the list.
*
* @param object Object to query the index of.
*/
s32 GetWaitObjectIndex(const WaitObject* object) const;
@@ -238,13 +246,9 @@ public:
*/
VAddr GetCommandBufferAddress() const;
/**
* Returns whether this thread is waiting for all the objects in
* its wait list to become ready, as a result of a WaitSynchronizationN call
* with wait_all = true.
*/
bool IsSleepingOnWaitAll() const {
return status == ThreadStatus::WaitSynchAll;
/// Returns whether this thread is waiting on objects from a WaitSynchronization call.
bool IsSleepingOnWait() const {
return status == ThreadStatus::WaitSynch;
}
ThreadContext& GetContext() {
@@ -418,7 +422,7 @@ private:
Process* owner_process;
/// Objects that the thread is waiting on, in the same order as they were
/// passed to WaitSynchronization1/N.
/// passed to WaitSynchronization.
ThreadWaitObjects wait_objects;
/// List of threads that are waiting for a mutex that is held by this thread.
@@ -441,7 +445,7 @@ private:
Handle callback_handle = 0;
/// Callback that will be invoked when the thread is resumed from a waiting state. If the thread
/// was waiting via WaitSynchronizationN then the object will be the last object that became
/// was waiting via WaitSynchronization then the object will be the last object that became
/// available. In case of a timeout, the object will be nullptr.
WakeupCallback wakeup_callback;

29
src/core/hle/kernel/wait_object.cpp
View File

@@ -38,8 +38,7 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() const {
const ThreadStatus thread_status = thread->GetStatus();
// The list of waiting threads must not contain threads that are not waiting to be awakened.
ASSERT_MSG(thread_status == ThreadStatus::WaitSynchAny ||
thread_status == ThreadStatus::WaitSynchAll ||
ASSERT_MSG(thread_status == ThreadStatus::WaitSynch ||
thread_status == ThreadStatus::WaitHLEEvent,
"Inconsistent thread statuses in waiting_threads");
@@ -49,10 +48,10 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() const {
if (ShouldWait(thread.get()))
continue;
// A thread is ready to run if it's either in ThreadStatus::WaitSynchAny or
// in ThreadStatus::WaitSynchAll and the rest of the objects it is waiting on are ready.
// A thread is ready to run if it's either in ThreadStatus::WaitSynch
// and the rest of the objects it is waiting on are ready.
bool ready_to_run = true;
if (thread_status == ThreadStatus::WaitSynchAll) {
if (thread_status == ThreadStatus::WaitSynch) {
ready_to_run = thread->AllWaitObjectsReady();
}
@@ -68,33 +67,35 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() const {
void WaitObject::WakeupWaitingThread(SharedPtr<Thread> thread) {
ASSERT(!ShouldWait(thread.get()));
if (!thread)
if (!thread) {
return;
}
if (!thread->IsSleepingOnWaitAll()) {
Acquire(thread.get());
} else {
if (thread->IsSleepingOnWait()) {
for (const auto& object : thread->GetWaitObjects()) {
ASSERT(!object->ShouldWait(thread.get()));
object->Acquire(thread.get());
}
} else {
Acquire(thread.get());
}
const std::size_t index = thread->GetWaitObjectIndex(this);
for (const auto& object : thread->GetWaitObjects())
for (const auto& object : thread->GetWaitObjects()) {
object->RemoveWaitingThread(thread.get());
}
thread->ClearWaitObjects();
thread->CancelWakeupTimer();
bool resume = true;
if (thread->HasWakeupCallback())
if (thread->HasWakeupCallback()) {
resume = thread->InvokeWakeupCallback(ThreadWakeupReason::Signal, thread, this, index);
if (resume)
}
if (resume) {
thread->ResumeFromWait();
}
}
void WaitObject::WakeupAllWaitingThreads() {