Removed -fno-strict-aliasing requirement

[libcds.git] / cds / details / bit_reverse_counter.h

diff --git a/cds/details/bit_reverse_counter.h b/cds/details/bit_reverse_counter.h
index 7deb044cc8d1664a601a4174f0f1dc592edf52c0..86c9406aff6e39adc36efda68bd02777ffae86fd 100644 (file)
--- a/cds/details/bit_reverse_counter.h
+++ b/cds/details/bit_reverse_counter.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) 2006-2017
+
+    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_DETAILS_BIT_REVERSE_COUNTER_H
 #define CDSLIB_DETAILS_BIT_REVERSE_COUNTER_H
@@ -43,17 +71,18 @@ namespace cds { namespace bitop {
 
         counter_type dec()
         {
+            counter_type ret = m_nReversed;
             --m_nCounter;
             int nBit;
             for ( nBit = m_nHighBit - 1; nBit >= 0; --nBit ) {
-                if ( cds::bitop::complement( m_nReversed, nBit ) )
+                if ( cds::bitop::complement( m_nReversed, nBit ))
                     break;
             }
             if ( nBit < 0 ) {
                 m_nReversed = m_nCounter;
                 --m_nHighBit;
             }
-            return m_nReversed;
+            return ret;
         }
 
         counter_type    value() const
@@ -65,6 +94,11 @@ namespace cds { namespace bitop {
         {
             return m_nReversed;
         }
+
+        int high_bit() const
+        {
+            return m_nHighBit;
+        }
     };
 
 }}   // namespace cds::bitop