Thread local storage is a must for parallel execution (bdb62164) · Commits · 戴 / Bird

aclocal.m4

+10 −8

Original line number	Diff line number	Diff line
		@@ -4,19 +4,21 @@ dnl ** (c) 1999 Martin Mares <mj@ucw.cz>
		AC_DEFUN([BIRD_CHECK_THREAD_LOCAL],
		[
		AC_CACHE_CHECK(
		[whether _Thread_local is known],
		[whether C11 thread local storage is available],
		[bird_cv_thread_local],
		AC_COMPILE_IFELSE([
		AC_LANG_PROGRAM(
		[
		_Thread_local static int x = 42;
		],
		[]
		)
		AC_LANG_PROGRAM([ static _Thread_local int x = 42; ])
		],
		[bird_cv_thread_local=yes],
		[
		AC_COMPILE_IFELSE([
		AC_LANG_PROGRAM([ static __thread int x = 42; ])
		],
		[bird_cv_thread_local=old],
		[bird_cv_thread_local=no]
		)
		]
		)
		)
		])

+4 −5

Original line number	Diff line number	Diff line
		@@ -121,13 +121,12 @@ fi

		AC_PROG_CC
		AC_PROG_CC_C99
		if test -z "$GCC" ; then
		AC_MSG_ERROR([This program requires the GNU C Compiler.])
		fi

		BIRD_CHECK_THREAD_LOCAL
		if test "$bird_cv_thread_local" = yes ; then
		AC_DEFINE([HAVE_THREAD_LOCAL], [1], [Define to 1 if _Thread_local is available])
		if test "$bird_cv_thread_local" = no ; then
		AC_MSG_ERROR([Thread local storage not available])
		elif test "$bird_cv_thread_local" = old ; then
		AC_DEFINE([HAVE_OLD_THREAD_LOCAL], [1], [Define to 1 if _Thread_local has to be defined as __thread])
		fi

		AC_CHECK_HEADER([stdatomic.h],

+2 −2

Original line number	Diff line number	Diff line
		@@ -93,8 +93,8 @@ struct filter_state {
		int flags;
		};

		_Thread_local static struct filter_state filter_state;
		_Thread_local static struct filter_stack filter_stack;
		static _Thread_local struct filter_state filter_state;
		static _Thread_local struct filter_stack filter_stack;

		void (bt_assert_hook)(int result, const struct f_line_item assert);

+2 −2

Original line number	Diff line number	Diff line
		@@ -75,8 +75,8 @@ static inline int u64_cmp(u64 i1, u64 i2)
		#define UNUSED __attribute__((unused))
		#define PACKED __attribute__((packed))

		#ifndef HAVE_THREAD_LOCAL
		#define _Thread_local
		#ifdef HAVE_OLD_THREAD_LOCAL
		#define _Thread_local __thread
		#endif

		/* Microsecond time */