+/*
+ 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 CDSSTRESS_PQUEUE_ITEM_H
+#define CDSSTRESS_PQUEUE_ITEM_H
+
+namespace pqueue {
+
+ struct simple_value {
+ typedef size_t key_type;
+
+ key_type key;
+
+ struct key_extractor {
+ void operator()( key_type& k, simple_value const& s ) const
+ {
+ k = s.key;
+ }
+ };
+
+ simple_value()
+ : key(0)
+ {}
+
+ simple_value( key_type n )
+ : key(n)
+ {}
+
+ friend bool operator <( simple_value const& lhs, simple_value const& rhs )
+ {
+ return lhs.key < rhs.key;
+ }
+ friend bool operator <( simple_value const& lhs, size_t rhs )
+ {
+ return lhs.key < rhs;
+ }
+ friend bool operator <( size_t lhs, simple_value const& rhs )
+ {
+ return lhs < rhs.key;
+ }
+
+ friend bool operator >( simple_value const& lhs, simple_value const& rhs )
+ {
+ return lhs.key > rhs.key;
+ }
+ friend bool operator >( simple_value const& lhs, size_t rhs )
+ {
+ return lhs.key > rhs;
+ }
+ friend bool operator >( size_t lhs, simple_value const& rhs )
+ {
+ return lhs > rhs.key;
+ }
+ };
+} // namespace pqueue
+
+#endif // #ifndef CDSSTRESS_PQUEUE_ITEM_H