thread_local.h

#ifndef INCLUDED_RTS_THREAD_LOCAL_H
#define INCLUDED_RTS_THREAD_LOCAL_H

#ifndef thread_local
# if __STDC_VERSION__ >= 201112 && !defined __STDC_NO_THREADS__
#  define thread_local _Thread_local
# elif defined _WIN32 && ( \
       defined _MSC_VER || \
       defined __ICL || \
       defined __DMC__ || \
       defined __BORLANDC__ )
#  define thread_local __declspec(thread) 
/* note that ICC (linux) and Clang are covered by __GNUC__ */
# elif defined __GNUC__ || \
       defined __SUNPRO_C || \
       defined __xlC__
#  define thread_local __thread
# else
#  error "Cannot define thread_local"
# endif
#endif

#endif