Fixed explicit ctor stuff

[libcds.git] / cds / container / lazy_kvlist_rcu.h

diff --git a/cds/container/lazy_kvlist_rcu.h b/cds/container/lazy_kvlist_rcu.h
index 631f0283cc4485e64d5049f048873da3760e78e5..155237c414ed6cddd325aaf7251144bc33f37434 100644 (file)
--- a/cds/container/lazy_kvlist_rcu.h
+++ b/cds/container/lazy_kvlist_rcu.h
@@ -1,4 +1,32 @@
-//$$CDS-header$$
+/*
+    This file is a part of libcds - Concurrent Data Structures library
+
+    (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016
+
+    Source code repo: http://github.com/khizmax/libcds/
+    Download: http://sourceforge.net/projects/libcds/files/
+    
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this
+      list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
 
 #ifndef CDSLIB_CONTAINER_LAZY_KVLIST_RCU_H
 #define CDSLIB_CONTAINER_LAZY_KVLIST_RCU_H
@@ -104,6 +132,7 @@ namespace cds { namespace container {
         typedef typename base_class::item_counter item_counter;   ///< Item counting policy used
         typedef typename maker::key_comparator    key_comparator; ///< key comparison functor
         typedef typename base_class::memory_model memory_model;   ///< Memory ordering. See cds::opt::memory_model option
+        typedef typename base_class::stat         stat;           ///< Internal statistics
         typedef typename base_class::rcu_check_deadlock rcu_check_deadlock ; ///< RCU deadlock checking policy
 
         typedef typename gc::scoped_lock    rcu_lock ;  ///< RCU scoped lock
@@ -259,7 +288,13 @@ namespace cds { namespace container {
         //@endcond
 
     public:
+    ///@name Forward iterators
+    //@{
         /// Forward iterator
+        /**
+            You may safely use iterators in multi-threaded environment only under external RCU lock.
+            Otherwise, a program crash is possible if another thread deletes the item the iterator points to.
+        */
         typedef iterator_type<false>    iterator;
 
         /// Const forward iterator
@@ -290,38 +325,46 @@ namespace cds { namespace container {
         }
 
         /// Returns a forward const iterator addressing the first element in a list
-        //@{
         const_iterator begin() const
         {
             const_iterator it( head() );
             ++it;   // skip dummy head
             return it;
         }
+
+        /// Returns a forward const iterator addressing the first element in a list
         const_iterator cbegin() const
         {
             const_iterator it( head() );
             ++it;   // skip dummy head
             return it;
         }
-        //@}
 
         /// Returns an const iterator that addresses the location succeeding the last element in a list
-        //@{
         const_iterator end() const
         {
             return const_iterator( tail());
         }
+
+        /// Returns an const iterator that addresses the location succeeding the last element in a list
         const_iterator cend() const
         {
             return const_iterator( tail());
         }
-        //@}
+    //@}
 
     public:
         /// Default constructor
         LazyKVList()
         {}
 
+        //@cond
+        template <typename Stat, typename = std::enable_if<std::is_same<stat, lazy_list::wrapped_stat<Stat>>::value >>
+        explicit LazyKVList( Stat& st )
+            : base_class( st )
+        {}
+        //@endcond
+
         /// Destructor clears the list
         ~LazyKVList()
         {
@@ -436,7 +479,7 @@ namespace cds { namespace container {
 
             The function applies RCU lock internally.
 
-            Returns <tt> std::pair<bool, bool> </tt> where \p first is true if operation is successfull,
+            Returns <tt> std::pair<bool, bool> </tt> where \p first is true if operation is successful,
             \p second is true if new item has been added or \p false if the item with \p key
             already exists.
         */
@@ -729,6 +772,12 @@ namespace cds { namespace container {
             return base_class::size();
         }
 
+        /// Returns const reference to internal statistics
+        stat const& statistics() const
+        {
+            return base_class::statistics();
+        }
+
         /// Clears the list
         void clear()
         {