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Diffstat (limited to 'thread-local.h')
| -rw-r--r-- | thread-local.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/thread-local.h b/thread-local.h new file mode 100644 index 00000000..61296e56 --- /dev/null +++ b/thread-local.h @@ -0,0 +1,69 @@ +/* + * Copyright (c) 1994, 1995, 1996 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Computer Systems + * Engineering Group at Lawrence Berkeley Laboratory. + * 4. Neither the name of the University nor of the Laboratory may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 thread_local_h +#define thread_local_h + +/* + * This defines thread_local to specify thread-local storage, if it + * is not already defined. + * + * C11, if __STDC_NO_THREADS__ is not defined to be 1, defines + * _Thread_local to indicate thread-local storage. (You can also + * include <threads.h> to so define it, but we don't use any of + * the other stuff there.) + * + * Otherwise, we define it ourselves, based on the compiler. + * + * This is taken from https://stackoverflow.com/a/18298965/16139739. + */ +#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 |