diff options
Diffstat (limited to 'src/core/hle/kernel/mutex.cpp')
-rw-r--r-- | src/core/hle/kernel/mutex.cpp | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/src/core/hle/kernel/mutex.cpp b/src/core/hle/kernel/mutex.cpp index 0743670ad5..98e87313bb 100644 --- a/src/core/hle/kernel/mutex.cpp +++ b/src/core/hle/kernel/mutex.cpp @@ -2,7 +2,6 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. -#include <map> #include <utility> #include <vector> @@ -10,8 +9,11 @@ #include "core/core.h" #include "core/hle/kernel/errors.h" #include "core/hle/kernel/handle_table.h" +#include "core/hle/kernel/kernel.h" #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" @@ -57,41 +59,47 @@ static void TransferMutexOwnership(VAddr mutex_addr, SharedPtr<Thread> current_t } } -ResultCode Mutex::TryAcquire(HandleTable& handle_table, VAddr address, Handle holding_thread_handle, +Mutex::Mutex(Core::System& system) : system{system} {} +Mutex::~Mutex() = default; + +ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle, Handle requesting_thread_handle) { // The mutex address must be 4-byte aligned if ((address % sizeof(u32)) != 0) { return ERR_INVALID_ADDRESS; } + 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; } @@ -102,7 +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) { @@ -111,7 +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(); |