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Kernel: Allow chaining WaitSynchronization calls inside a wakeup callback.

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Subv 2018-01-08 11:35:03 -05:00 • committed by bunnei
parent 1b9ed033fc
commit 2a3f8e8484
4 changed files with 78 additions and 30 deletions
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56
src/core/hle/kernel/svc.cpp
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@ -120,17 +120,19 @@ static ResultCode GetProcessId(u32* process_id, Handle process_handle) {
}
/// Default thread wakeup callback for WaitSynchronization
static void DefaultThreadWakeupCallback(ThreadWakeupReason reason, SharedPtr<Thread> thread,
SharedPtr<WaitObject> object) {
static bool DefaultThreadWakeupCallback(ThreadWakeupReason reason, SharedPtr<Thread> thread,
SharedPtr<WaitObject> object, size_t index) {
ASSERT(thread->status == THREADSTATUS_WAIT_SYNCH_ANY);
if (reason == ThreadWakeupReason::Timeout) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
return;
return true;
}
ASSERT(reason == ThreadWakeupReason::Signal);
thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
return true;
};
/// Wait for a kernel object to synchronize, timeout after the specified nanoseconds
@ -499,20 +501,44 @@ static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr semaphore_add
ASSERT(semaphore->available_count == 0);
ASSERT(semaphore->mutex_addr == mutex_addr);
CASCADE_CODE(WaitSynchronization1(
semaphore, thread.get(), nano_seconds,
[mutex](ThreadWakeupReason reason, SharedPtr<Thread> thread, SharedPtr<WaitObject> object) {
ASSERT(thread->status == THREADSTATUS_WAIT_SYNCH_ANY);
auto wakeup_callback = [mutex, nano_seconds](ThreadWakeupReason reason,
SharedPtr<Thread> thread,
SharedPtr<WaitObject> object, size_t index) {
ASSERT(thread->status == THREADSTATUS_WAIT_SYNCH_ANY);
if (reason == ThreadWakeupReason::Timeout) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
return;
}
if (reason == ThreadWakeupReason::Timeout) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
return true;
}
ASSERT(reason == ThreadWakeupReason::Signal);
thread->SetWaitSynchronizationResult(WaitSynchronization1(mutex, thread.get()));
thread->SetWaitSynchronizationOutput(thread->GetWaitObjectIndex(object.get()));
}));
ASSERT(reason == ThreadWakeupReason::Signal);
// Now try to acquire the mutex and don't resume if it's not available.
if (!mutex->ShouldWait(thread.get())) {
mutex->Acquire(thread.get());
thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
return true;
}
if (nano_seconds == 0) {
thread->SetWaitSynchronizationResult(RESULT_TIMEOUT);
return true;
}
thread->wait_objects = {mutex};
mutex->AddWaitingThread(thread);
thread->status = THREADSTATUS_WAIT_SYNCH_ANY;
// Create an event to wake the thread up after the
// specified nanosecond delay has passed
thread->WakeAfterDelay(nano_seconds);
thread->wakeup_callback = DefaultThreadWakeupCallback;
Core::System::GetInstance().PrepareReschedule();
return false;
};
CASCADE_CODE(WaitSynchronization1(semaphore, thread.get(), nano_seconds, wakeup_callback));
mutex->Release(thread.get());