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authorGravatar Subv2018-04-20 14:42:29 -0500
committerGravatar Subv2018-04-20 21:04:32 -0500
commit5fdfbfe25adafd2734a19fe94cccc58993cb12e7 (patch)
treea4940a8231d08c5b96ce2d629acc04948ab1af3a /src/core/hle/kernel/mutex.cpp
parentKernel: Properly implemented svcWaitProcessWideKey and svcSignalProcessWideKey (diff)
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Kernel: Remove old and unused Mutex code.
Diffstat (limited to 'src/core/hle/kernel/mutex.cpp')
-rw-r--r--src/core/hle/kernel/mutex.cpp120
1 files changed, 0 insertions, 120 deletions
diff --git a/src/core/hle/kernel/mutex.cpp b/src/core/hle/kernel/mutex.cpp
index 50a9a0805..5cc0bd266 100644
--- a/src/core/hle/kernel/mutex.cpp
+++ b/src/core/hle/kernel/mutex.cpp
@@ -40,126 +40,6 @@ static std::pair<SharedPtr<Thread>, u32> GetHighestPriorityMutexWaitingThread(VA
40 return {highest_priority_thread, num_waiters}; 40 return {highest_priority_thread, num_waiters};
41} 41}
42 42
43void ReleaseThreadMutexes(Thread* thread) {
44 for (auto& mtx : thread->held_mutexes) {
45 mtx->SetHasWaiters(false);
46 mtx->SetHoldingThread(nullptr);
47 mtx->WakeupAllWaitingThreads();
48 }
49 thread->held_mutexes.clear();
50}
51
52Mutex::Mutex() {}
53Mutex::~Mutex() {}
54
55SharedPtr<Mutex> Mutex::Create(SharedPtr<Kernel::Thread> holding_thread, VAddr guest_addr,
56 std::string name) {
57 SharedPtr<Mutex> mutex(new Mutex);
58
59 mutex->guest_addr = guest_addr;
60 mutex->name = std::move(name);
61
62 // If mutex was initialized with a holding thread, acquire it by the holding thread
63 if (holding_thread) {
64 mutex->Acquire(holding_thread.get());
65 }
66
67 // Mutexes are referenced by guest address, so track this in the kernel
68 g_object_address_table.Insert(guest_addr, mutex);
69
70 return mutex;
71}
72
73bool Mutex::ShouldWait(Thread* thread) const {
74 auto holding_thread = GetHoldingThread();
75 return holding_thread != nullptr && thread != holding_thread;
76}
77
78void Mutex::Acquire(Thread* thread) {
79 ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
80
81 priority = thread->current_priority;
82 thread->held_mutexes.insert(this);
83 SetHoldingThread(thread);
84 thread->UpdatePriority();
85 Core::System::GetInstance().PrepareReschedule();
86}
87
88ResultCode Mutex::Release(Thread* thread) {
89 auto holding_thread = GetHoldingThread();
90 ASSERT(holding_thread);
91
92 // We can only release the mutex if it's held by the calling thread.
93 ASSERT(thread == holding_thread);
94
95 holding_thread->held_mutexes.erase(this);
96 holding_thread->UpdatePriority();
97 SetHoldingThread(nullptr);
98 SetHasWaiters(!GetWaitingThreads().empty());
99 WakeupAllWaitingThreads();
100 Core::System::GetInstance().PrepareReschedule();
101
102 return RESULT_SUCCESS;
103}
104
105void Mutex::AddWaitingThread(SharedPtr<Thread> thread) {
106 WaitObject::AddWaitingThread(thread);
107 thread->pending_mutexes.insert(this);
108 SetHasWaiters(true);
109 UpdatePriority();
110}
111
112void Mutex::RemoveWaitingThread(Thread* thread) {
113 WaitObject::RemoveWaitingThread(thread);
114 thread->pending_mutexes.erase(this);
115 if (!GetHasWaiters())
116 SetHasWaiters(!GetWaitingThreads().empty());
117 UpdatePriority();
118}
119
120void Mutex::UpdatePriority() {
121 if (!GetHoldingThread())
122 return;
123
124 u32 best_priority = THREADPRIO_LOWEST;
125 for (auto& waiter : GetWaitingThreads()) {
126 if (waiter->current_priority < best_priority)
127 best_priority = waiter->current_priority;
128 }
129
130 if (best_priority != priority) {
131 priority = best_priority;
132 GetHoldingThread()->UpdatePriority();
133 }
134}
135
136Handle Mutex::GetOwnerHandle() const {
137 GuestState guest_state{Memory::Read32(guest_addr)};
138 return guest_state.holding_thread_handle;
139}
140
141SharedPtr<Thread> Mutex::GetHoldingThread() const {
142 GuestState guest_state{Memory::Read32(guest_addr)};
143 return g_handle_table.Get<Thread>(guest_state.holding_thread_handle);
144}
145
146void Mutex::SetHoldingThread(SharedPtr<Thread> thread) {
147 GuestState guest_state{Memory::Read32(guest_addr)};
148 guest_state.holding_thread_handle.Assign(thread ? thread->guest_handle : 0);
149 Memory::Write32(guest_addr, guest_state.raw);
150}
151
152bool Mutex::GetHasWaiters() const {
153 GuestState guest_state{Memory::Read32(guest_addr)};
154 return guest_state.has_waiters != 0;
155}
156
157void Mutex::SetHasWaiters(bool has_waiters) {
158 GuestState guest_state{Memory::Read32(guest_addr)};
159 guest_state.has_waiters.Assign(has_waiters ? 1 : 0);
160 Memory::Write32(guest_addr, guest_state.raw);
161}
162
163ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle, 43ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
164 Handle requesting_thread_handle) { 44 Handle requesting_thread_handle) {
165 // The mutex address must be 4-byte aligned 45 // The mutex address must be 4-byte aligned