From 6cbc3929a54d37bd23cb5efa8e3320ba02f78b2f Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Fri, 31 May 2019 17:20:37 -0400
Subject: Use slang- prefix on slang compiler and core source (#973)

* Prefixing source files in source/slang with slang-

* Prefix source in source/slang with slang- prefix.

* Rename core source files with slang- prefix.

* Update project files.

* Fix problems from automatic merge.
---
 source/core/slang-smart-pointer.h | 250 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 250 insertions(+)
 create mode 100644 source/core/slang-smart-pointer.h

(limited to 'source/core/slang-smart-pointer.h')

diff --git a/source/core/slang-smart-pointer.h b/source/core/slang-smart-pointer.h
new file mode 100644
index 000000000..bae30de37
--- /dev/null
+++ b/source/core/slang-smart-pointer.h
@@ -0,0 +1,250 @@
+#ifndef SLANG_CORE_SMART_POINTER_H
+#define SLANG_CORE_SMART_POINTER_H
+
+#include "slang-common.h"
+#include "slang-hash.h"
+#include "slang-type-traits.h"
+
+#include "../../slang.h"
+
+namespace Slang
+{
+    // Base class for all reference-counted objects
+    class RefObject
+    {
+    private:
+        UInt referenceCount;
+
+    public:
+        RefObject()
+            : referenceCount(0)
+        {}
+
+        RefObject(const RefObject &)
+            : referenceCount(0)
+        {}
+
+        virtual ~RefObject()
+        {}
+
+        UInt addReference()
+        {
+            return ++referenceCount;
+        }
+
+        UInt decreaseReference()
+        {
+            return --referenceCount;
+        }
+
+        UInt releaseReference()
+        {
+            SLANG_ASSERT(referenceCount != 0);
+            if(--referenceCount == 0)
+            {
+                delete this;
+                return 0;
+            }
+            return referenceCount;
+        }
+
+        bool isUniquelyReferenced()
+        {
+            SLANG_ASSERT(referenceCount != 0);
+            return referenceCount == 1;
+        }
+
+        UInt debugGetReferenceCount()
+        {
+            return referenceCount;
+        }
+    };
+
+    SLANG_FORCE_INLINE void addReference(RefObject* obj)
+    {
+        if(obj) obj->addReference();
+    }
+
+    SLANG_FORCE_INLINE void releaseReference(RefObject* obj)
+    {
+        if(obj) obj->releaseReference();
+    }
+
+    // For straight dynamic cast.
+    // Use instead of dynamic_cast as it allows for replacement without using Rtti in the future
+    template <typename T>
+    SLANG_FORCE_INLINE T* dynamicCast(RefObject* obj) { return dynamic_cast<T*>(obj); }
+    template <typename T>
+    SLANG_FORCE_INLINE const T* dynamicCast(const RefObject* obj) { return dynamic_cast<const T*>(obj); }
+
+    // Like a dynamicCast, but allows a type to implement a specific implementation that is suitable for it
+    template <typename T>
+    SLANG_FORCE_INLINE T* as(RefObject* obj) { return dynamicCast<T>(obj); }
+    template <typename T>
+    SLANG_FORCE_INLINE const T* as(const RefObject* obj) { return dynamicCast<T>(obj); }
+
+    // "Smart" pointer to a reference-counted object
+    template<typename T>
+    struct RefPtr
+    {
+        RefPtr()
+            : pointer(nullptr)
+        {}
+
+        RefPtr(T* p)
+            : pointer(p)
+        {
+            addReference(p);
+        }
+
+        RefPtr(RefPtr<T> const& p)
+            : pointer(p.pointer)
+        {
+            addReference(p.pointer);
+        }
+
+        RefPtr(RefPtr<T>&& p)
+            : pointer(p.pointer)
+        {
+            p.pointer = nullptr;
+        }
+
+        template <typename U>
+        RefPtr(RefPtr<U> const& p,
+            typename EnableIf<IsConvertible<T*, U*>::Value, void>::type * = 0)
+            : pointer((U*) p)
+        {
+            addReference((U*) p);
+        }
+
+#if 0
+        void operator=(T* p)
+        {
+            T* old = pointer;
+            addReference(p);
+            pointer = p;
+            releaseReference(old);
+        }
+#endif
+
+        void operator=(RefPtr<T> const& p)
+        {
+            T* old = pointer;
+            addReference(p.pointer);
+            pointer = p.pointer;
+            releaseReference(old);
+        }
+
+        void operator=(RefPtr<T>&& p)
+        {
+            T* old = pointer;
+            pointer = p.pointer;
+            p.pointer = old;
+        }
+
+        template <typename U>
+        typename EnableIf<IsConvertible<T*, U*>::value, void>::type
+            operator=(RefPtr<U> const& p)
+        {
+            T* old = pointer;
+            addReference(p.pointer);
+            pointer = p.pointer;
+            releaseReference(old);
+        }
+
+        int GetHashCode()
+        {
+            // Note: We need a `RefPtr<T>` to hash the same as a `T*`,
+            // so that a `T*` can be used as a key in a dictionary with
+            // `RefPtr<T>` keys, and vice versa.
+            //
+            return Slang::GetHashCode(pointer);
+        }
+
+        bool operator==(const T * ptr) const
+        {
+            return pointer == ptr;
+        }
+
+        bool operator!=(const T * ptr) const
+        {
+            return pointer != ptr;
+        }
+
+		bool operator==(RefPtr<T> const& ptr) const
+		{
+			return pointer == ptr.pointer;
+		}
+
+		bool operator!=(RefPtr<T> const& ptr) const
+		{
+			return pointer != ptr.pointer;
+		}
+
+        template<typename U>
+        RefPtr<U> dynamicCast() const
+        {
+            return RefPtr<U>(Slang::dynamicCast<U>(pointer));
+        }
+
+        template<typename U>
+        RefPtr<U> as() const
+        {
+            return RefPtr<U>(Slang::as<U>(pointer));
+        }
+
+        template <typename U>
+        bool is() const { return Slang::as<U>(pointer) != nullptr; }
+
+        ~RefPtr()
+        {
+            releaseReference((Slang::RefObject*) pointer);
+        }
+
+        T& operator*() const
+        {
+            return *pointer;
+        }
+
+        T* operator->() const
+        {
+            return pointer;
+        }
+
+		T * Ptr() const
+		{
+			return pointer;
+		}
+
+        operator T*() const
+        {
+            return pointer;
+        }
+
+        void attach(T* p)
+        {
+            T* old = pointer;
+            pointer = p;
+            releaseReference(old);
+        }
+
+        T* detach()
+        {
+            auto rs = pointer;
+            pointer = nullptr;
+            return rs;
+        }
+
+        /// Get ready for writing (nulls contents)
+        SLANG_FORCE_INLINE T** writeRef() { *this = nullptr; return &pointer; }
+
+        /// Get for read access
+        SLANG_FORCE_INLINE T*const* readRef() const { return &pointer; }
+
+    private:
+        T* pointer;
+        
+	};
+}
+
+#endif
-- 
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