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SVC: Correct SignalEvent, ClearEvent, ResetSignal, WaitSynchronization, CancelSynchronization, ArbitrateLock

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This commit is contained in:
Fernando Sahmkow 2020-02-25 16:38:33 -04:00
parent ef4afa9760
commit 3b5b950c89
8 changed files with 136 additions and 92 deletions
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116
src/core/hle/kernel/synchronization.cpp
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@ -10,78 +10,88 @@
#include "core/hle/kernel/synchronization.h"
#include "core/hle/kernel/synchronization_object.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/time_manager.h"
namespace Kernel {
/// Default thread wakeup callback for WaitSynchronization
static bool DefaultThreadWakeupCallback(ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
std::shared_ptr<SynchronizationObject> object,
std::size_t index) {
ASSERT(thread->GetStatus() == ThreadStatus::WaitSynch);
if (reason == ThreadWakeupReason::Timeout) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
return true;
}
ASSERT(reason == ThreadWakeupReason::Signal);
thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
thread->SetWaitSynchronizationOutput(static_cast<u32>(index));
return true;
}
Synchronization::Synchronization(Core::System& system) : system{system} {}
void Synchronization::SignalObject(SynchronizationObject& obj) const {
SchedulerLock lock(system.Kernel());
if (obj.IsSignaled()) {
obj.WakeupAllWaitingThreads();
for (auto thread : obj.GetWaitingThreads()) {
if (thread->GetSchedulingStatus() == ThreadSchedStatus::Paused) {
thread->SetSynchronizationResults(&obj, RESULT_SUCCESS);
thread->ResumeFromWait();
}
}
}
}
std::pair<ResultCode, Handle> Synchronization::WaitFor(
std::vector<std::shared_ptr<SynchronizationObject>>& sync_objects, s64 nano_seconds) {
auto& kernel = system.Kernel();
auto* const thread = system.CurrentScheduler().GetCurrentThread();
// Find the first object that is acquirable in the provided list of objects
const auto itr = std::find_if(sync_objects.begin(), sync_objects.end(),
[thread](const std::shared_ptr<SynchronizationObject>& object) {
return object->IsSignaled();
});
Handle event_handle = InvalidHandle;
{
SchedulerLockAndSleep lock(kernel, event_handle, thread, nano_seconds);
const auto itr =
std::find_if(sync_objects.begin(), sync_objects.end(),
[thread](const std::shared_ptr<SynchronizationObject>& object) {
return object->IsSignaled();
});
if (itr != sync_objects.end()) {
// We found a ready object, acquire it and set the result value
SynchronizationObject* object = itr->get();
object->Acquire(thread);
const u32 index = static_cast<s32>(std::distance(sync_objects.begin(), itr));
return {RESULT_SUCCESS, index};
if (itr != sync_objects.end()) {
// We found a ready object, acquire it and set the result value
SynchronizationObject* object = itr->get();
object->Acquire(thread);
const u32 index = static_cast<s32>(std::distance(sync_objects.begin(), itr));
lock.CancelSleep();
return {RESULT_SUCCESS, index};
}
if (nano_seconds == 0) {
lock.CancelSleep();
return {RESULT_TIMEOUT, InvalidHandle};
}
/// TODO(Blinkhawk): Check for termination pending
if (thread->IsSyncCancelled()) {
thread->SetSyncCancelled(false);
lock.CancelSleep();
return {ERR_SYNCHRONIZATION_CANCELED, InvalidHandle};
}
for (auto& object : sync_objects) {
object->AddWaitingThread(SharedFrom(thread));
}
thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
thread->SetStatus(ThreadStatus::WaitSynch);
}
// No objects were ready to be acquired, prepare to suspend the thread.
// If a timeout value of 0 was provided, just return the Timeout error code instead of
// suspending the thread.
if (nano_seconds == 0) {
return {RESULT_TIMEOUT, InvalidHandle};
if (event_handle != InvalidHandle) {
auto& time_manager = kernel.TimeManager();
time_manager.UnscheduleTimeEvent(event_handle);
}
if (thread->IsSyncCancelled()) {
thread->SetSyncCancelled(false);
return {ERR_SYNCHRONIZATION_CANCELED, InvalidHandle};
{
SchedulerLock lock(kernel);
ResultCode signaling_result = thread->GetSignalingResult();
SynchronizationObject* signaling_object = thread->GetSignalingObject();
if (signaling_result == RESULT_SUCCESS) {
const auto itr = std::find_if(
sync_objects.begin(), sync_objects.end(),
[signaling_object](const std::shared_ptr<SynchronizationObject>& object) {
return object.get() == signaling_object;
});
ASSERT(itr != sync_objects.end());
signaling_object->Acquire(thread);
const u32 index = static_cast<s32>(std::distance(sync_objects.begin(), itr));
return {RESULT_SUCCESS, index};
}
return {signaling_result, -1};
}
for (auto& object : sync_objects) {
object->AddWaitingThread(SharedFrom(thread));
}
thread->SetSynchronizationObjects(std::move(sync_objects));
thread->SetStatus(ThreadStatus::WaitSynch);
// Create an event to wake the thread up after the specified nanosecond delay has passed
thread->WakeAfterDelay(nano_seconds);
thread->SetWakeupCallback(DefaultThreadWakeupCallback);
system.PrepareReschedule(thread->GetProcessorID());
return {RESULT_TIMEOUT, InvalidHandle};
}
} // namespace Kernel