fixed adding file problem

[c11concurrency-benchmarks.git] / gdax-orderbook-hpp / demo / dependencies / libcds-2.3.2 / cds / opt / value_cleaner.h

diff --git a/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/opt/value_cleaner.h b/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/opt/value_cleaner.h
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+/*
+    This file is a part of libcds - Concurrent Data Structures library
+
+    (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+    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_OPT_ITEM_DISPOSER_H
+#define CDSLIB_OPT_ITEM_DISPOSER_H
+
+#include <cds/details/defs.h>
+
+namespace cds { namespace opt {
+
+    /// [type-option] value cleaning
+    /**
+        The cleaner is a functor called when an item is removed from a container.
+        Note, the cleaner should not delete (deallocate) the value \p val passed in.
+        However, if the \p value_type type is a structure that contains dynamically allocated
+        field(s), the cleaning functor may deallocate it and initialize to default value (usually, \p nullptr).
+
+        The interface for type \p value_type is:
+        \code
+        struct myCleaner {
+            void operator ()( value_type& val )
+            {
+                ...
+                // code to cleanup val
+            }
+        }
+        \endcode
+
+        Predefined option types:
+            \li opt::v::empty_cleaner
+            \li opt::v::destruct_cleaner
+            \li opt::v::auto_cleaner
+    */
+    template <typename Type>
+    struct value_cleaner {
+        //@cond
+        template <typename BASE> struct pack: public BASE
+        {
+            typedef Type value_cleaner;
+        };
+        //@endcond
+    };
+
+    namespace v {
+
+        /// Empty cleaner
+        /**
+            One of available type for \p opt::value_cleaner option.
+            This cleaner is empty, i.e. it does not do any cleaning.
+        */
+        struct empty_cleaner
+        {
+            //@cond
+            template <typename T>
+            void operator()( T& /*val*/ )
+            {}
+            //@endcond
+        };
+
+        /// Cleaner that calls destructor of type \p T
+        /**
+            One of available type for \p opt::value_cleaner option.
+        */
+        struct destruct_cleaner
+        {
+            //@cond
+            template <typename T>
+            void operator()( T& val )
+            {
+                ( &val )->~T();
+            }
+            //@endcond
+        };
+
+        /// Cleaner that calls \p T destructor if it is not trivial
+        /**
+            If \p T has non-trivial destructor (<tt> std::is_trivially_destructible<T>::value </tt> is \p false),
+            the cleaner calls \p T destructor.
+
+            If <tt> std::is_trivially_destructible<T>::value </tt> is \p true, the cleaner is empty - no
+            destructor of \p T is called.
+        */
+        struct auto_cleaner
+        {
+            //@cond
+            template <typename T>
+            typename std::enable_if< std::is_trivially_destructible<T>::value >::type
+            operator()( T& /*val*/ )
+            {}
+
+            template <typename T>
+            typename std::enable_if< !std::is_trivially_destructible<T>::value >::type
+            operator()( T& val )
+            {
+                ( &val )->~T();
+            }
+            //@endcond
+        };
+
+    }   // namespace v
+}}  // namespace cds::opt
+
+#endif // #ifndef CDSLIB_OPT_ITEM_DISPOSER_H