])
#
-# Check for thread local storage
+# Check for C11 thread local storage
#
# NOTE: OpenBSD doesn't ship <threads.h>, so we can't require it (yet).
#
AC_CHECK_HEADERS([threads.h])
+#
+# C11 Atomic Operations
+#
+
+AC_CHECK_HEADERS([stdatomic.h],
+ [],
+ [AC_MSG_ERROR([C11 Atomic Operations required, update your toolchain to build BIND 9])])
+
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <stdatomic.h>]],
+ [[atomic_int_fast32_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
+ )],
+ [AC_MSG_CHECKING([whether -latomic is needed for 64-bit stdatomic.h functions])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <stdatomic.h>]],
+ [[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
+ )],
+ [AC_MSG_RESULT([no])],
+ [LIBS="$LIBS -latomic"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <stdatomic.h>]],
+ [[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
+ )],
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
+ ])
+ ],
+ [AC_MSG_FAILURE([stdatomic.h header found, but compilation failed, please fix your toolchain.])])
+
+AC_CHECK_HEADERS([stdalign.h stdnoreturn.h],
+ [],
+ [AC_MSG_ERROR([C11 standard headers not found, update your toolchain.])])
+
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
#
AC_CHECK_FUNCS([if_nametoindex])
-ISC_ATOMIC_LIBS=""
-AC_CHECK_HEADERS(
- [stdatomic.h],
- [AC_MSG_CHECKING([for memory model aware atomic operations])
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <stdatomic.h>]],
- [[atomic_int_fast32_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
- )],
- [AC_MSG_RESULT([stdatomic.h])
- AC_MSG_CHECKING([whether -latomic is needed for 64-bit stdatomic.h functions])
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <stdatomic.h>]],
- [[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
- )],
- [AC_MSG_RESULT([no])],
- [ISC_ATOMIC_LIBS="-latomic"
- AX_SAVE_FLAGS([atomic])
- LIBS="$LIBS $ISC_ATOMIC_LIBS"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <stdatomic.h>]],
- [[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
- )],
- [AC_MSG_RESULT([yes])],
- [AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
- AX_RESTORE_FLAGS([atomic])
- ])
- ],
- [AC_MSG_FAILURE([stdatomic.h header found, but compilation failed, please fix your toolchain.])]
- )],
- [AC_MSG_CHECKING([for memory model aware atomic operations])
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <inttypes.h>]],
- [[int32_t val = 0; __atomic_fetch_add(&val, 1, __ATOMIC_RELAXED);]]
- )],
- [AC_MSG_RESULT([__atomic builtins])
- AC_DEFINE([HAVE___ATOMIC], [1], [define if __atomic builtins are not available])
- AC_MSG_CHECKING([whether -latomic is needed for 64-bit __atomic builtins])
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <inttypes.h>]],
- [[int64_t val = 0; __atomic_fetch_add(&val, 1, __ATOMIC_RELAXED);]]
- )],
- [AC_MSG_RESULT([no])],
- [ISC_ATOMIC_LIBS="-latomic"
- AX_SAVE_FLAGS([atomic])
- LIBS="$LIBS $ISC_ATOMIC_LIBS"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <inttypes.h>]],
- [[int64_t val = 0; __atomic_fetch_add(&val, 1, __ATOMIC_RELAXED);]]
- )],
- [AC_MSG_RESULT([yes])],
- [AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
- AX_RESTORE_FLAGS([atomic])
- ])
- ],
- [AC_MSG_FAILURE([not found])
- ])
- ])
-LIBS="$LIBS $ISC_ATOMIC_LIBS"
-
-AC_CHECK_HEADERS([stdalign.h stdnoreturn.h])
-
AC_CHECK_HEADERS([uchar.h])
#
+++ /dev/null
-/*
- * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
- *
- * SPDX-License-Identifier: MPL-2.0
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, you can obtain one at https://mozilla.org/MPL/2.0/.
- *
- * See the COPYRIGHT file distributed with this work for additional
- * information regarding copyright ownership.
- */
-
-#pragma once
-
-#include <inttypes.h>
-#include <stdbool.h>
-#include <stddef.h>
-#if HAVE_UCHAR_H
-#include <uchar.h>
-#endif /* HAVE_UCHAR_H */
-
-/* GCC 4.7.0 introduced __atomic builtins, but not the __GNUC_ATOMICS define */
-#if !defined(__GNUC_ATOMICS) && __GNUC__ == 4 && __GNUC_MINOR__ >= 7
-#define __GNUC_ATOMICS
-#endif
-
-#if !defined(__GNUC_ATOMICS)
-#error "isc/stdatomic.h does not support your compiler"
-#endif /* if !defined(__GNUC_ATOMICS) */
-
-typedef enum memory_order {
- memory_order_relaxed = __ATOMIC_RELAXED,
- memory_order_consume = __ATOMIC_CONSUME,
- memory_order_acquire = __ATOMIC_ACQUIRE,
- memory_order_release = __ATOMIC_RELEASE,
- memory_order_acq_rel = __ATOMIC_ACQ_REL,
- memory_order_seq_cst = __ATOMIC_SEQ_CST
-} memory_order;
-
-#ifndef HAVE_UCHAR_H
-typedef uint_least16_t char16_t;
-typedef uint_least32_t char32_t;
-#endif /* HAVE_UCHAR_H */
-
-typedef bool atomic_bool;
-typedef char atomic_char;
-typedef signed char atomic_schar;
-typedef unsigned char atomic_uchar;
-typedef short atomic_short;
-typedef unsigned short atomic_ushort;
-typedef int atomic_int;
-typedef unsigned int atomic_uint;
-typedef long atomic_long;
-typedef unsigned long atomic_ulong;
-typedef long long atomic_llong;
-typedef unsigned long long atomic_ullong;
-typedef char16_t atomic_char16_t;
-typedef char32_t atomic_char32_t;
-typedef wchar_t atomic_wchar_t;
-typedef int_least8_t atomic_int_least8_t;
-typedef uint_least8_t atomic_uint_least8_t;
-typedef int_least16_t atomic_int_least16_t;
-typedef uint_least16_t atomic_uint_least16_t;
-typedef int_least32_t atomic_int_least32_t;
-typedef uint_least32_t atomic_uint_least32_t;
-typedef int_least64_t atomic_int_least64_t;
-typedef uint_least64_t atomic_uint_least64_t;
-typedef int_fast8_t atomic_int_fast8_t;
-typedef uint_fast8_t atomic_uint_fast8_t;
-typedef int_fast16_t atomic_int_fast16_t;
-typedef uint_fast16_t atomic_uint_fast16_t;
-typedef int_fast32_t atomic_int_fast32_t;
-typedef uint_fast32_t atomic_uint_fast32_t;
-typedef int_fast64_t atomic_int_fast64_t;
-typedef uint_fast64_t atomic_uint_fast64_t;
-typedef intptr_t atomic_intptr_t;
-typedef uintptr_t atomic_uintptr_t;
-typedef size_t atomic_size_t;
-typedef ptrdiff_t atomic_ptrdiff_t;
-typedef intmax_t atomic_intmax_t;
-typedef uintmax_t atomic_uintmax_t;
-
-#define atomic_init(obj, desired) (*obj = desired)
-#define atomic_load_explicit(obj, order) __atomic_load_n(obj, order)
-#define atomic_store_explicit(obj, desired, order) \
- __atomic_store_n(obj, desired, order)
-#define atomic_fetch_add_explicit(obj, arg, order) \
- __atomic_fetch_add(obj, arg, order)
-#define atomic_fetch_sub_explicit(obj, arg, order) \
- __atomic_fetch_sub(obj, arg, order)
-#define atomic_fetch_and_explicit(obj, arg, order) \
- __atomic_fetch_and(obj, arg, order)
-#define atomic_fetch_or_explicit(obj, arg, order) \
- __atomic_fetch_or(obj, arg, order)
-#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
- fail) \
- __atomic_compare_exchange_n(obj, expected, desired, 0, succ, fail)
-#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, \
- fail) \
- __atomic_compare_exchange_n(obj, expected, desired, 1, succ, fail)
-#define atomic_exchange_explicit(obj, desired, order) \
- __atomic_exchange_n(obj, desired, order)
-
-#define atomic_load(obj) atomic_load_explicit(obj, memory_order_seq_cst)
-#define atomic_store(obj, arg) \
- atomic_store_explicit(obj, arg, memory_order_seq_cst)
-#define atomic_fetch_add(obj, arg) \
- atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst)
-#define atomic_fetch_sub(obj, arg) \
- atomic_fetch_sub_explicit(obj, arg, memory_order_seq_cst)
-#define atomic_fetch_and(obj, arg) \
- atomic_fetch_and_explicit(obj, arg, memory_order_seq_cst)
-#define atomic_fetch_or(obj, arg) \
- atomic_fetch_or_explicit(obj, arg, memory_order_seq_cst)
-#define atomic_compare_exchange_strong(obj, expected, desired) \
- atomic_compare_exchange_strong_explicit(obj, expected, desired, \
- memory_order_seq_cst, \
- memory_order_seq_cst)
-#define atomic_compare_exchange_weak(obj, expected, desired) \
- atomic_compare_exchange_weak_explicit(obj, expected, desired, \
- memory_order_seq_cst, \
- memory_order_seq_cst)
-#define atomic_exchange(obj, desired) \
- atomic_exchange_explicit(obj, desired, memory_order_seq_cst)
projects / thirdparty / bind9.git / commitdiff
