Removed redundant comment

[libcds.git] / src / urcu_sh.cpp

diff --git a/src/urcu_sh.cpp b/src/urcu_sh.cpp
index d450a6b679aafd1911122efa520c52a83c824e68..d7568c7a1abc586cb59a22d7f85d554643949b64 100644 (file)
--- a/src/urcu_sh.cpp
+++ b/src/urcu_sh.cpp
@@ -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.
+*/
 
 #include <cds/urcu/details/sh.h>
 
@@ -6,7 +34,17 @@
 namespace cds { namespace urcu { namespace details {
 
     template<> CDS_EXPORT_API singleton_vtbl * sh_singleton_instance< signal_buffered_tag >::s_pRCU = nullptr;
-    template<> CDS_EXPORT_API singleton_vtbl * sh_singleton_instance< signal_threaded_tag >::s_pRCU = nullptr;
+
+    template <>
+    void sh_singleton<signal_buffered_tag>::signal_handler( int /*signo*/, siginfo_t * /*sigInfo*/, void * /*context*/ )
+    {
+        thread_record * pRec = cds::threading::getRCU<signal_buffered_tag>();
+        if ( pRec ) {
+            atomics::atomic_signal_fence( atomics::memory_order_acquire );
+            pRec->m_bNeedMemBar.store( false, atomics::memory_order_relaxed );
+            atomics::atomic_signal_fence( atomics::memory_order_release );
+        }
+    }
 
 }}} // namespace cds::urcu::details