Initial ZMQ bindings.

vendor/ZMQ/src/array.hpp

@@ -0,0 +1,140 @@
+/*
+    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_ARRAY_INCLUDED__
+#define __ZMQ_ARRAY_INCLUDED__
+
+#include <vector>
+#include <algorithm>
+
+#include "macros.hpp"
+
+namespace zmq
+{
+//  Implementation of fast arrays with O(1) access, insertion and
+//  removal. The array stores pointers rather than objects.
+//  O(1) is achieved by making items inheriting from
+//  array_item_t<ID> class which internally stores the position
+//  in the array.
+//  The ID template argument is used to differentiate among arrays
+//  and thus let an object be stored in different arrays.
+
+//  Base class for objects stored in the array. If you want to store
+//  same object in multiple arrays, each of those arrays has to have
+//  different ID. The item itself has to be derived from instantiations of
+//  array_item_t template for all relevant IDs.
+
+template <int ID = 0> class array_item_t
+{
+  public:
+    array_item_t () : _array_index (-1) {}
+
+    //  The destructor doesn't have to be virtual. It is made virtual
+    //  just to keep ICC and code checking tools from complaining.
+    virtual ~array_item_t () ZMQ_DEFAULT;
+
+    void set_array_index (int index_) { _array_index = index_; }
+
+    int get_array_index () const { return _array_index; }
+
+  private:
+    int _array_index;
+
+    ZMQ_NON_COPYABLE_NOR_MOVABLE (array_item_t)
+};
+
+
+template <typename T, int ID = 0> class array_t
+{
+  private:
+    typedef array_item_t<ID> item_t;
+
+  public:
+    typedef typename std::vector<T *>::size_type size_type;
+
+    array_t () ZMQ_DEFAULT;
+
+    size_type size () { return _items.size (); }
+
+    bool empty () { return _items.empty (); }
+
+    T *&operator[] (size_type index_) { return _items[index_]; }
+
+    void push_back (T *item_)
+    {
+        if (item_)
+            static_cast<item_t *> (item_)->set_array_index (
+              static_cast<int> (_items.size ()));
+        _items.push_back (item_);
+    }
+
+    void erase (T *item_)
+    {
+        erase (static_cast<item_t *> (item_)->get_array_index ());
+    }
+
+    void erase (size_type index_)
+    {
+        if (_items.empty ())
+            return;
+        static_cast<item_t *> (_items.back ())
+          ->set_array_index (static_cast<int> (index_));
+
+        _items[index_] = _items.back ();
+        _items.pop_back ();
+    }
+
+    void swap (size_type index1_, size_type index2_)
+    {
+        if (_items[index1_])
+            static_cast<item_t *> (_items[index1_])
+              ->set_array_index (static_cast<int> (index2_));
+        if (_items[index2_])
+            static_cast<item_t *> (_items[index2_])
+              ->set_array_index (static_cast<int> (index1_));
+        std::swap (_items[index1_], _items[index2_]);
+    }
+
+    void clear () { _items.clear (); }
+
+    static size_type index (T *item_)
+    {
+        return static_cast<size_type> (
+          static_cast<item_t *> (item_)->get_array_index ());
+    }
+
+  private:
+    typedef std::vector<T *> items_t;
+    items_t _items;
+
+    ZMQ_NON_COPYABLE_NOR_MOVABLE (array_t)
+};
+}
+
+#endif