Kernel: Convert Semaphore to not use Handles

src/core/hle/kernel/semaphore.h

@@ -4,29 +4,50 @@
 
 #pragma once
 
+#include <queue>
+#include <string>
+
 #include "common/common_types.h"
 
 #include "core/hle/kernel/kernel.h"
 
 namespace Kernel {
 
-/**
- * Creates a semaphore.
- * @param handle Pointer to the handle of the newly created object
- * @param initial_count Number of slots reserved for other threads
- * @param max_count Maximum number of slots the semaphore can have
- * @param name Optional name of semaphore
- * @return ResultCode of the error
- */
-ResultCode CreateSemaphore(Handle* handle, s32 initial_count, s32 max_count, const std::string& name = "Unknown");
+class Semaphore : public WaitObject {
+public:
+    /**
+     * Creates a semaphore.
+     * @param handle Pointer to the handle of the newly created object
+     * @param initial_count Number of slots reserved for other threads
+     * @param max_count Maximum number of slots the semaphore can have
+     * @param name Optional name of semaphore
+     * @return The created semaphore
+     */
+    static ResultVal<SharedPtr<Semaphore>> Create(s32 initial_count, s32 max_count,
+            std::string name = "Unknown");
 
-/**
- * Releases a certain number of slots from a semaphore.
- * @param count The number of free slots the semaphore had before this call
- * @param handle The handle of the semaphore to release
- * @param release_count The number of slots to release
- * @return ResultCode of the error
- */
-ResultCode ReleaseSemaphore(s32* count, Handle handle, s32 release_count);
+    std::string GetTypeName() const override { return "Semaphore"; }
+    std::string GetName() const override { return name; }
+
+    static const HandleType HANDLE_TYPE = HandleType::Semaphore;
+    HandleType GetHandleType() const override { return HANDLE_TYPE; }
+
+    s32 max_count;                              ///< Maximum number of simultaneous holders the semaphore can have
+    s32 available_count;                        ///< Number of free slots left in the semaphore
+    std::string name;                           ///< Name of semaphore (optional)
+
+    bool ShouldWait() override;
+    void Acquire() override;
+
+    /**
+     * Releases a certain number of slots from a semaphore.
+     * @param release_count The number of slots to release
+     * @return The number of free slots the semaphore had before this call
+     */
+    ResultVal<s32> Release(s32 release_count);
+
+private:
+    Semaphore() = default;
+};
 
 } // namespace