add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.

examples/ThirdPartyLibs/urdf/boost_replacement/shared_ptr.h

@@ -0,0 +1,210 @@
+/*
+Bullet Continuous Collision Detection and Physics Library Maya Plugin
+Copyright (c) 2008 Walt Disney Studios
+ 
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising
+from the use of this software.
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it freely,
+subject to the following restrictions:
+ 
+1. The origin of this software must not be misrepresented; you must
+not claim that you wrote the original software. If you use this
+software in a product, an acknowledgment in the product documentation
+would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must
+not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+ 
+Written by: Nicola Candussi <nicola@fluidinteractive.com>
+
+Modified by Francisco Gochez
+Dec 2011 - Added deferencing operator
+*/
+
+//my_shared_ptr
+
+#ifndef DYN_SHARED_PTR_H
+#define DYN_SHARED_PTR_H
+
+#define DYN_SHARED_PTR_THREAD_SAFE
+
+
+#include <assert.h>
+
+#ifdef _WIN32
+#include <windows.h>
+
+class my_shared_count {
+public:
+    my_shared_count(): m_count(1) {   }
+    ~my_shared_count() {    }
+
+    long increment()
+    {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        return InterlockedIncrement(&m_count);
+#else
+        return ++m_count;
+#endif
+    }
+
+    long decrement() {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        return InterlockedDecrement(&m_count);
+#else
+        return ++m_count;
+#endif
+    }
+
+    long use_count() { return m_count;  }
+
+private:
+    long m_count;
+};
+#else //ifdef WIN32
+
+
+#include <pthread.h>
+
+class my_shared_count {
+public:
+    my_shared_count(): m_count(1) {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_init(&m_mutex, 0);
+#endif
+    }
+    ~my_shared_count() {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_destroy(&m_mutex);
+#endif
+    }
+
+    long increment()
+    {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_lock(&m_mutex);
+#endif
+        long c = ++m_count;  
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_unlock(&m_mutex);
+#endif
+        return c;
+     }
+
+    long decrement() {
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_lock(&m_mutex);
+#endif
+        long c = --m_count;  
+#ifdef DYN_SHARED_PTR_THREAD_SAFE
+        pthread_mutex_unlock(&m_mutex);
+#endif
+        return c;
+    }
+
+    long use_count() { return m_count;  }
+
+private:
+    long m_count;
+    mutable pthread_mutex_t m_mutex;
+};
+
+#endif
+
+
+template<typename T>
+class my_shared_ptr
+{
+public:
+    my_shared_ptr(): m_ptr(NULL), m_count(NULL) { }
+    my_shared_ptr(my_shared_ptr<T> const& other):
+            m_ptr(other.m_ptr),
+            m_count(other.m_count)
+    {
+        if(other.m_count != NULL) other.m_count->increment();
+    }
+
+    template<typename U>
+    my_shared_ptr(my_shared_ptr<U> const& other):
+            m_ptr(other.m_ptr),
+            m_count(other.m_count)
+    {
+        if(other.m_count != NULL)  other.m_count->increment();
+    }
+
+    my_shared_ptr(T const* other): m_ptr(const_cast<T*>(other)), m_count(NULL)
+    {
+        if(other != NULL) m_count = new my_shared_count;
+    }
+
+    ~my_shared_ptr() 
+    {
+        giveup_ownership();
+    }
+
+    void reset(T const* other) 
+    {
+        if(m_ptr == other) return;
+        giveup_ownership();
+        m_ptr = const_cast<T*>(other);
+        if(other != NULL) m_count = new my_shared_count;
+        else m_count = NULL;
+    }
+
+    T* get() { return m_ptr; }
+    T const* get() const { return m_ptr; }
+    T* operator->() {   return m_ptr; }
+    T const* operator->() const { return m_ptr; }
+    operator bool() const { return m_ptr != NULL; }
+	T& operator*() const
+	{ 
+		assert(m_ptr != 0);
+		return *m_ptr;
+	}
+
+    bool operator<(my_shared_ptr<T> const& rhs) const { return m_ptr < rhs.m_ptr; }
+
+    my_shared_ptr<T>& operator=(my_shared_ptr<T> const& other) {
+        if(m_ptr == other.m_ptr) return *this;
+        giveup_ownership();
+        m_ptr = other.m_ptr;
+        m_count = other.m_count;
+        if(other.m_count != NULL) m_count->increment();
+        return *this;
+    }
+
+    template<typename U> 
+    my_shared_ptr<T>& operator=(my_shared_ptr<U>& other) {
+        if(m_ptr == other.m_ptr) return *this;
+        giveup_ownership();
+        m_ptr = other.m_ptr;
+        m_count = other.m_count;
+        if(other.m_count != NULL) m_count->increment();
+        return *this;
+    }
+
+protected:
+
+    template<typename U> friend class my_shared_ptr;
+    void giveup_ownership()
+    {
+        if(m_count != NULL) {
+            if( m_count->decrement() == 0) {
+                delete m_ptr;
+                m_ptr = NULL;
+                delete m_count;
+                m_count = NULL;
+            }
+        }
+    }
+
+protected:
+    T               *m_ptr;
+    my_shared_count    *m_count;
+
+};
+
+
+#endif