added ace + vcproj for win

--HG-- branch : trunk
2010-06-07 19:10:55 +02:00
parent 2e0f8fb6e5
commit 32546e2282
1316 changed files with 335947 additions and 0 deletions
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+// -*- C++ -*-
+
+//==========================================================================
+/**
+ *  @file Value_Ptr.h
+ *
+ *  $Id: Value_Ptr.h 80826 2008-03-04 14:51:23Z wotte $
+ *
+ *  Value_Ptr implementation based on code in Herb Sutter's book "More
+ *  Exceptional C++".
+ *
+ *  @author Ossama Othman <[email protected]>
+ */
+//==========================================================================
+
+#ifndef ACE_VALUE_PTR_H
+#define ACE_VALUE_PTR_H
+
+#include "ace/config-lite.h"
+
+#include <algorithm>
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+namespace ACE
+{
+  /**
+   * @struct VP_traits
+   *
+   * @brief @c Value_Ptr traits template structure.
+   *
+   * The @c Value_Ptr template class delegates some operations to this
+   * template traits structure.
+   *
+   * Specialize this trait template if cloning through copy
+   * construction is not sufficient.  For example, to avoid slicing
+   * when copying an object through a base class pointer, one can
+   * implement a virtual "clone" method that can be used to
+   * polymorphically invoke the appropriate cloning operation(s).
+   * That virtual method would then be invoked by the @c VP_traits\<\>
+   * specialization.
+   */
+  template <typename T>
+  struct VP_traits
+  {
+    /// Copy the given object.
+    static T * clone (T const * p) { return new T (*p); }
+  };
+
+  /**
+   * @class Value_Ptr
+   *
+   * @brief Smart pointer implementation designed for use as a class
+   *        member.
+   *
+   * Using a @c std::auto_ptr\<\> as a class member is sometimes
+   * problematic since ownership of memory is transferred when copying
+   * such members.  This @c Value_Ptr class is explicitly designed to
+   * avoid such problems by performing copies of the underlying object
+   * rather than transfer ownership.  This, for example, allows it to
+   * be readily used as a member in classes placed inside STL
+   * containers.
+   *
+   * @see Item 31 in "More Exceptional C++" by Herb Sutter.
+   */
+  template <typename T>
+  class Value_Ptr
+  {
+  public:
+
+    /// Constructor.
+    explicit Value_Ptr (T * p = 0) : p_ (p) { }
+
+    /// Destructor.
+    ~Value_Ptr (void) { delete this->p_; }
+
+    /// Deference operator.
+    T & operator* (void) const { return *this->p_; }
+
+    /// Pointer operator.
+    T * operator-> (void) const { return this->p_; }
+
+    /// Non-throwing swap operation used to make assignment strongly
+    /// exception-safe.
+    /**
+     * @note As implemented, the swap operation may not work correctly
+     *       for @c auto_ptr\<\>s, but why would one use an @c
+     *       auto_ptr\<\> as the template argument for this particular
+     *       template class!?
+     */
+    void swap (Value_Ptr & other) { std::swap (this->p_, other.p_); }
+
+    /// Copy constructor.
+    Value_Ptr (Value_Ptr const & other)
+      : p_ (create_from (other.p_)) { }
+
+    /// Assignment operator.
+    Value_Ptr & operator= (Value_Ptr const & other)
+    {
+      // Strongly exception-safe.
+      Value_Ptr temp (other);
+      this->swap (temp);
+      return *this;
+    }
+
+#ifndef ACE_LACKS_MEMBER_TEMPLATES
+
+    // Compiler can't handle member templates so we lose converting
+    // copy operations.
+
+    /// Converting copy constructor.
+    template <typename U>
+    Value_Ptr (Value_Ptr<U> const & other)
+      : p_ (create_from (other.p_)) { }
+
+    /// Converting assignment operator.
+    template <typename U>
+    Value_Ptr & operator= (Value_Ptr<U> const & other)
+    {
+      // Strongly exception-safe.
+      Value_Ptr temp (other);
+      this->swap (temp);
+      return *this;
+    }
+
+#endif  /* !ACE_LACKS_MEMBER_TEMPLATES */
+
+  private:
+
+#ifndef ACE_LACKS_MEMBER_TEMPLATES
+
+    /// Copying method invoked when copy constructing.
+    template <typename U>
+    T * create_from (U const * p) const
+    {
+      return p ? VP_traits<U>::clone (p) : 0;
+    }
+
+#else
+
+    // Compiler can't handle member templates so we lose converting
+    // copy operations.
+
+    /// Copying method invoked when copy constructing.
+    T * create_from (T const * p) const
+    {
+      return p ? VP_traits<T>::clone (p) : 0;
+    }
+
+#endif  /* !ACE_LACKS_MEMBER_TEMPLATES */
+
+  private:
+
+#ifndef ACE_LACKS_MEMBER_TEMPLATES
+    template <typename U> friend class Value_Ptr;
+#endif  /* !ACE_LACKS_MEMBER_TEMPLATES */
+
+    /// Object owned by this @c Value_Ptr.
+    T * p_;
+
+  };
+
+}
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#endif  /* ACE_VALUE_PTR_H */