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Code Issues Releases Activity

hle: kernel: KConditionVariable: Migrate to updated KThreadQueue.

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This commit is contained in:
bunnei 2021-11-09 21:28:09 -08:00
parent e942d97540
commit beb55cb90e
1 changed files with 55 additions and 12 deletions
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67
src/core/hle/kernel/k_condition_variable.cpp
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@ -11,6 +11,7 @@
#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
#include "core/hle/kernel/k_synchronization_object.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/k_thread_queue.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/svc_common.h"
#include "core/hle/kernel/svc_results.h"
@ -57,6 +58,48 @@ bool UpdateLockAtomic(Core::System& system, u32* out, VAddr address, u32 if_zero
return true;
}
class ThreadQueueImplForKConditionVariableWaitForAddress final : public KThreadQueue {
public:
explicit ThreadQueueImplForKConditionVariableWaitForAddress(KernelCore& kernel_)
: KThreadQueue(kernel_) {}
virtual void CancelWait(KThread* waiting_thread, ResultCode wait_result,
bool cancel_timer_task) override {
// Remove the thread as a waiter from its owner.
waiting_thread->GetLockOwner()->RemoveWaiter(waiting_thread);
// Invoke the base cancel wait handler.
KThreadQueue::CancelWait(waiting_thread, wait_result, cancel_timer_task);
}
};
class ThreadQueueImplForKConditionVariableWaitConditionVariable final : public KThreadQueue {
private:
KConditionVariable::ThreadTree* m_tree;
public:
explicit ThreadQueueImplForKConditionVariableWaitConditionVariable(
KernelCore& kernel_, KConditionVariable::ThreadTree* t)
: KThreadQueue(kernel_), m_tree(t) {}
virtual void CancelWait(KThread* waiting_thread, ResultCode wait_result,
bool cancel_timer_task) override {
// Remove the thread as a waiter from its owner.
if (KThread* owner = waiting_thread->GetLockOwner(); owner != nullptr) {
owner->RemoveWaiter(waiting_thread);
}
// If the thread is waiting on a condvar, remove it from the tree.
if (waiting_thread->IsWaitingForConditionVariable()) {
m_tree->erase(m_tree->iterator_to(*waiting_thread));
waiting_thread->ClearConditionVariable();
}
// Invoke the base cancel wait handler.
KThreadQueue::CancelWait(waiting_thread, wait_result, cancel_timer_task);
}
};
} // namespace
KConditionVariable::KConditionVariable(Core::System& system_)
@ -84,8 +127,7 @@ ResultCode KConditionVariable::SignalToAddress(VAddr addr) {
next_value |= Svc::HandleWaitMask;
}
next_owner_thread->SetWaitResult(ResultSuccess);
next_owner_thread->Wakeup();
next_owner_thread->EndWait(ResultSuccess);
}
// Write the value to userspace.
@ -103,6 +145,7 @@ ResultCode KConditionVariable::SignalToAddress(VAddr addr) {
ResultCode KConditionVariable::WaitForAddress(Handle handle, VAddr addr, u32 value) {
KThread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
ThreadQueueImplForKConditionVariableWaitForAddress wait_queue(kernel);
// Wait for the address.
{
@ -133,7 +176,9 @@ ResultCode KConditionVariable::WaitForAddress(Handle handle, VAddr addr, u32 val
// Update the lock.
cur_thread->SetAddressKey(addr, value);
owner_thread->AddWaiter(cur_thread);
cur_thread->SetState(ThreadState::Waiting);
// Begin waiting.
cur_thread->BeginWait(std::addressof(wait_queue));
cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::ConditionVar);
cur_thread->SetMutexWaitAddressForDebugging(addr);
}
@ -178,8 +223,7 @@ KThread* KConditionVariable::SignalImpl(KThread* thread) {
if (can_access) {
if (prev_tag == Svc::InvalidHandle) {
// If nobody held the lock previously, we're all good.
thread->SetWaitResult(ResultSuccess);
thread->Wakeup();
thread->EndWait(ResultSuccess);
} else {
// Get the previous owner.
KThread* owner_thread = kernel.CurrentProcess()
@ -194,14 +238,12 @@ KThread* KConditionVariable::SignalImpl(KThread* thread) {
thread_to_close = owner_thread;
} else {
// The lock was tagged with a thread that doesn't exist.
thread->SetWaitResult(ResultInvalidState);
thread->Wakeup();
thread->EndWait(ResultInvalidState);
}
}
} else {
// If the address wasn't accessible, note so.
thread->SetWaitResult(ResultInvalidCurrentMemory);
thread->Wakeup();
thread->EndWait(ResultInvalidCurrentMemory);
}
return thread_to_close;
@ -259,6 +301,8 @@ void KConditionVariable::Signal(u64 cv_key, s32 count) {
ResultCode KConditionVariable::Wait(VAddr addr, u64 key, u32 value, s64 timeout) {
// Prepare to wait.
KThread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
ThreadQueueImplForKConditionVariableWaitConditionVariable wait_queue(
kernel, std::addressof(thread_tree));
{
KScopedSchedulerLockAndSleep slp{kernel, cur_thread, timeout};
@ -289,8 +333,7 @@ ResultCode KConditionVariable::Wait(VAddr addr, u64 key, u32 value, s64 timeout)
}
// Wake up the next owner.
next_owner_thread->SetWaitResult(ResultSuccess);
next_owner_thread->Wakeup();
next_owner_thread->EndWait(ResultSuccess);
}
// Write to the cv key.
@ -315,7 +358,7 @@ ResultCode KConditionVariable::Wait(VAddr addr, u64 key, u32 value, s64 timeout)
// If the timeout is non-zero, set the thread as waiting.
if (timeout != 0) {
cur_thread->SetState(ThreadState::Waiting);
cur_thread->BeginWait(std::addressof(wait_queue));
cur_thread->SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::ConditionVar);
cur_thread->SetMutexWaitAddressForDebugging(addr);
}