From fea03e59c2570baaaef6dfaf01cd3ee095402e1e Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Sat, 5 Dec 2015 14:27:47 +0100
Subject: Add player based on Windows Media Foundation.

---
 src/player/backends/utility/com_ptr.h | 148 ++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 src/player/backends/utility/com_ptr.h

(limited to 'src/player/backends/utility/com_ptr.h')

diff --git a/src/player/backends/utility/com_ptr.h b/src/player/backends/utility/com_ptr.h
new file mode 100644
index 0000000..23534b2
--- /dev/null
+++ b/src/player/backends/utility/com_ptr.h
@@ -0,0 +1,148 @@
+# ifndef __TD__COM_PTR_H__
+# define __TD__COM_PTR_H__
+# pragma once
+
+template <typename T>
+class com_ptr
+{
+//private:
+//    typedef void (com_ptr::*bool_type)() const;
+//    void safe_bool() const {}
+//
+//
+public:
+    com_ptr():
+        _ptr(nullptr)
+    {
+    }
+
+    com_ptr(T* ptr, bool add_ref = false):
+        _ptr(ptr)
+    {
+        if (_ptr && add_ref)
+            _ptr->AddRef();
+    }
+
+    com_ptr(const com_ptr& rhs):
+        _ptr(rhs._ptr)
+    {
+        if (_ptr)
+            _ptr->AddRef();
+    }
+
+    com_ptr(com_ptr&& rhs):
+        _ptr(rhs._ptr)
+    {
+        rhs._ptr = nullptr;
+    }
+
+    template <typename U>
+    com_ptr(const com_ptr<U>& rhs):
+        _ptr(rhs._ptr)
+    {
+        if (_ptr)
+            _ptr->AddRef();
+    }
+
+    ~com_ptr()
+    {
+        if (_ptr)
+            _ptr->Release();
+    }
+
+    com_ptr& operator = (const com_ptr& rhs)
+    {
+        com_ptr(rhs).swap(*this);
+        return *this;
+    }
+
+    com_ptr& operator = (com_ptr&& rhs)
+    {
+        com_ptr(static_cast<com_ptr&&>(rhs)).swap(*this);
+        return *this;
+    }
+
+    template <typename U>
+    com_ptr& operator = (const com_ptr<U>& rhs)
+    {
+        com_ptr(rhs).swap(*this):
+        return *this;
+    }
+
+    com_ptr& operator = (T* rhs)
+    {
+        com_ptr(rhs).swap(*this);
+        return *this;
+    }
+
+    //operator bool_type() const
+    //{
+    //    return _ptr ? &com_ptr::safe_bool : nullptr;
+    //}
+
+    //bool_type operator !() const
+    //{
+    //    return !((bool_type)*this);
+    //}
+
+    void reset()
+    {
+        com_ptr().swap(*this);
+    }
+
+    void reset(T* rhs)
+    {
+        com_ptr(rhs).swap(*this);
+    }
+
+    void reset(T* rhs, bool add_ref)
+    {
+        com_ptr(rhs, add_ref).swap(*this);
+    }
+
+    T* get() const
+    {
+        return _ptr;
+    }
+
+    T* detach()
+    {
+        auto result = _ptr;
+        _ptr = nullptr;
+        return result;
+    }
+
+    void swap(com_ptr& rhs)
+    {
+        T* temp = rhs._ptr;
+        rhs._ptr = _ptr;
+        _ptr = temp;
+    }
+
+    T&  operator *  () const { return *_ptr; }
+    T*  operator -> () const { return  _ptr; }
+
+        operator T* () const { return  _ptr; }
+    T** operator &  ()       { return &_ptr; }
+
+private:
+    T*      _ptr;
+};
+
+template <typename T, typename U> inline bool operator==(const com_ptr<T>& a, const com_ptr<U>& b) { return a.get() == b.get(); }
+template <typename T, typename U> inline bool operator!=(const com_ptr<T>& a, const com_ptr<U>& b) { return a.get() != b.get(); }
+template <typename T, typename U> inline bool operator==(const com_ptr<T>& a, U* b) { return a.get() == b; }
+template <typename T, typename U> inline bool operator!=(const com_ptr<T>& a, U* b) { return a.get() != b; }
+template <typename T, typename U> inline bool operator==(T* a, const com_ptr<U>& b) { return a == b.get(); }
+template <typename T, typename U> inline bool operator!=(T* a, const com_ptr<U>& b) { return a != b.get(); }
+template <typename T> inline bool operator==(const com_ptr<T>& p, std::nullptr_t) { return p.get() == nullptr; }
+template <typename T> inline bool operator==(std::nullptr_t, const com_ptr<T>& p) { return p.get() == nullptr; }
+template <typename T> inline bool operator!=(const com_ptr<T>& p, std::nullptr_t) { return p.get() != nullptr; }
+template <typename T> inline bool operator!=(std::nullptr_t, const com_ptr<T>& p) { return p.get() != nullptr; }
+template <typename T> inline bool operator<(const com_ptr<T>& a, const com_ptr<T>& b) { return std::less<T*>()(a.get(), b.get()); }
+template <typename T> inline bool operator<=(const com_ptr<T>& a, const com_ptr<T>& b) { return std::less_equal<T*>()(a.get(), b.get()); }
+template <typename T> inline bool operator>(const com_ptr<T>& a, const com_ptr<T>& b) { return std::greater<T*>()(a.get(), b.get()); }
+template <typename T> inline bool operator>=(const com_ptr<T>& a, const com_ptr<T>& b) { return std::greater_equal<T*>()(a.get(), b.get()); }
+template <typename T> void swap(com_ptr<T> & lhs, com_ptr<T> & rhs) { lhs.swap(rhs); }
+
+# endif // __TD__COM_PTR_H__
\ No newline at end of file
-- 
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