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core/hle/kernel/mutex: Remove usages of global system accessors 

Removes the use of global system accessors, and instead uses the
explicit interface provided.
This commit is contained in:
Lioncash 2019-03-14 00:56:04 -04:00
parent 555cd26ec2
commit d71cad6ed0
1 changed files with 15 additions and 11 deletions
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26
src/core/hle/kernel/mutex.cpp
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@ -13,6 +13,7 @@
#include "core/hle/kernel/mutex.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/scheduler.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/result.h"
#include "core/memory.h"
@ -69,34 +70,36 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
}
const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
Thread* const current_thread = system.CurrentScheduler().GetCurrentThread();
SharedPtr<Thread> holding_thread = handle_table.Get<Thread>(holding_thread_handle);
SharedPtr<Thread> requesting_thread = handle_table.Get<Thread>(requesting_thread_handle);
// TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of another
// thread.
ASSERT(requesting_thread == GetCurrentThread());
ASSERT(requesting_thread == current_thread);
u32 addr_value = Memory::Read32(address);
const u32 addr_value = Memory::Read32(address);
// If the mutex isn't being held, just return success.
if (addr_value != (holding_thread_handle | Mutex::MutexHasWaitersFlag)) {
return RESULT_SUCCESS;
}
if (holding_thread == nullptr)
if (holding_thread == nullptr) {
return ERR_INVALID_HANDLE;
}
// Wait until the mutex is released
GetCurrentThread()->SetMutexWaitAddress(address);
GetCurrentThread()->SetWaitHandle(requesting_thread_handle);
current_thread->SetMutexWaitAddress(address);
current_thread->SetWaitHandle(requesting_thread_handle);
GetCurrentThread()->SetStatus(ThreadStatus::WaitMutex);
GetCurrentThread()->InvalidateWakeupCallback();
current_thread->SetStatus(ThreadStatus::WaitMutex);
current_thread->InvalidateWakeupCallback();
// Update the lock holder thread's priority to prevent priority inversion.
holding_thread->AddMutexWaiter(GetCurrentThread());
holding_thread->AddMutexWaiter(current_thread);
Core::System::GetInstance().PrepareReschedule();
system.PrepareReschedule();
return RESULT_SUCCESS;
}
@ -107,7 +110,8 @@ ResultCode Mutex::Release(VAddr address) {
return ERR_INVALID_ADDRESS;
}
auto [thread, num_waiters] = GetHighestPriorityMutexWaitingThread(GetCurrentThread(), address);
auto* const current_thread = system.CurrentScheduler().GetCurrentThread();
auto [thread, num_waiters] = GetHighestPriorityMutexWaitingThread(current_thread, address);
// There are no more threads waiting for the mutex, release it completely.
if (thread == nullptr) {
@ -116,7 +120,7 @@ ResultCode Mutex::Release(VAddr address) {
}
// Transfer the ownership of the mutex from the previous owner to the new one.
TransferMutexOwnership(address, GetCurrentThread(), thread);
TransferMutexOwnership(address, current_thread, thread);
u32 mutex_value = thread->GetWaitHandle();