early-access version 1255

src/core/hle/kernel/mutex.h

@@ -0,0 +1,42 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+union ResultCode;
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+
+class Mutex final {
+public:
+    explicit Mutex(Core::System& system);
+    ~Mutex();
+
+    /// Flag that indicates that a mutex still has threads waiting for it.
+    static constexpr u32 MutexHasWaitersFlag = 0x40000000;
+    /// Mask of the bits in a mutex address value that contain the mutex owner.
+    static constexpr u32 MutexOwnerMask = 0xBFFFFFFF;
+
+    /// Attempts to acquire a mutex at the specified address.
+    ResultCode TryAcquire(VAddr address, Handle holding_thread_handle,
+                          Handle requesting_thread_handle);
+
+    /// Unlocks a mutex for owner at address
+    std::pair<ResultCode, std::shared_ptr<Thread>> Unlock(std::shared_ptr<Thread> owner,
+                                                          VAddr address);
+
+    /// Releases the mutex at the specified address.
+    ResultCode Release(VAddr address);
+
+private:
+    Core::System& system;
+};
+
+} // namespace Kernel