From 4040ad259dceca1a3f66c0c2f2f11dda57360361 Mon Sep 17 00:00:00 2001
From: Yuxuan Shui <yshuiv7@gmail.com>
Date: Wed, 19 Dec 2018 23:10:37 +0000
Subject: [PATCH] Add compiler dependent macros for thread_local

Also add stdc-predef.h because __STDC_NO_THREADS__ is defined there.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
---
 src/compiler.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/compiler.h b/src/compiler.h
index dca59e9..86ab76c 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -2,6 +2,8 @@
 // Copyright (c) 2018 Yuxuan Shui <yshuiv7@gmail.com>
 #pragma once
 
+#include <stdc-predef.h>
+
 #define auto         __auto_type
 #define likely(x)    __builtin_expect(!!(x), 1)
 #define unlikely(x)  __builtin_expect(!!(x), 0)
@@ -79,3 +81,13 @@
 #else
 # define unreachable do {} while(0)
 #endif
+
+#ifndef __STDC_NO_THREADS__
+# include <threads.h>
+#elif __STDC_VERSION__ >= 201112L
+# define thread_local _Thread_local
+#elif defined(__GNUC__) || defined(__clang__)
+# define thread_local __thread
+#else
+# define thread_local _Pragma("GCC error \"No thread local storage support\"") __error__
+#endif