--- /dev/null
+/*
+ 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_THREADING_DETAILS_GCC_MANAGER_H
+#define CDSLIB_THREADING_DETAILS_GCC_MANAGER_H
+
+#if !( CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG || CDS_COMPILER == CDS_COMPILER_INTEL)
+# error "threading/details/gcc_manager.h may be used only with GCC or Clang C++ compiler"
+#endif
+
+#include <cds/threading/details/_common.h>
+
+//@cond
+namespace cds { namespace threading {
+
+ //@cond
+ struct gcc_internal {
+ typedef unsigned char ThreadDataPlaceholder[ sizeof(ThreadData) ];
+ static __thread ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) s_threadData;
+ static __thread ThreadData * s_pThreadData;
+ };
+ //@endcond
+
+ /// cds::threading::Manager implementation based on GCC __thread declaration
+ inline namespace gcc {
+
+ /// Thread-specific data manager based on GCC __thread feature
+ class Manager {
+ private :
+ //@cond
+
+ static ThreadData * _threadData()
+ {
+ return gcc_internal::s_pThreadData;
+ }
+
+ static ThreadData * create_thread_data()
+ {
+ if ( !gcc_internal::s_pThreadData ) {
+ gcc_internal::s_pThreadData = new (gcc_internal::s_threadData) ThreadData();
+ }
+ return gcc_internal::s_pThreadData;
+ }
+
+ static void destroy_thread_data()
+ {
+ if ( gcc_internal::s_pThreadData ) {
+ ThreadData * p = gcc_internal::s_pThreadData;
+ gcc_internal::s_pThreadData = nullptr;
+ p->ThreadData::~ThreadData();
+ }
+ }
+ //@endcond
+
+ public:
+ /// Initialize manager (empty function)
+ /**
+ This function is automatically called by cds::Initialize
+ */
+ static void init()
+ {}
+
+ /// Terminate manager (empty function)
+ /**
+ This function is automatically called by cds::Terminate
+ */
+ static void fini()
+ {}
+
+ /// Checks whether current thread is attached to \p libcds feature or not.
+ static bool isThreadAttached()
+ {
+ return _threadData() != nullptr;
+ }
+
+ /// This method must be called in beginning of thread execution
+ static void attachThread()
+ {
+ create_thread_data()->init();
+ }
+
+ /// This method must be called in end of thread execution
+ static void detachThread()
+ {
+ assert( _threadData());
+
+ if ( _threadData()->fini())
+ destroy_thread_data();
+ }
+
+ /// Returns ThreadData pointer for the current thread
+ static ThreadData * thread_data()
+ {
+ ThreadData * p = _threadData();
+ assert( p );
+ return p;
+ }
+
+ //@cond
+ static size_t fake_current_processor()
+ {
+ return _threadData()->fake_current_processor();
+ }
+ //@endcond
+ };
+
+ } // namespace gcc
+
+}} // namespace cds::threading
+//@endcond
+
+#endif // #ifndef CDSLIB_THREADING_DETAILS_GCC_MANAGER_H