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1 | # SPDX-License-Identifier: GPL-2.0-or-later WITH LicenseRef-Autoconf-exception-macro |
2 | # SPDX-FileCopyrightText: 2023 Michael Jeanson <mjeanson@efficios.com> | |
3 | # | |
3afcf5a0 OD |
4 | # SYNOPSIS |
5 | # | |
6 | # AE_CC_ATOMIC_BUILTINS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) | |
7 | # | |
3afcf5a0 OD |
8 | |
9 | #serial 1 | |
10 | ||
11 | AC_DEFUN([AE_CC_ATOMIC_BUILTINS], [ | |
12 | AC_REQUIRE([AC_PROG_CC]) | |
13 | AC_LANG_PUSH([C]) | |
14 | ||
15 | AC_CACHE_CHECK( | |
16 | [whether $CC supports atomic builtins], | |
17 | [ae_cv_cc_atomic_builtins], | |
18 | [ | |
19 | AC_LINK_IFELSE([ | |
20 | AC_LANG_PROGRAM([ | |
21 | int x, y; | |
22 | ],[ | |
23 | __atomic_store_n(&x, 0, __ATOMIC_RELAXED); | |
24 | __atomic_load_n(&x, __ATOMIC_RELAXED); | |
25 | y = __atomic_exchange_n(&x, 1, __ATOMIC_RELAXED); | |
26 | __atomic_compare_exchange_n(&x, &y, 0, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); | |
27 | __atomic_add_fetch(&x, 1, __ATOMIC_RELAXED); | |
28 | __atomic_sub_fetch(&x, 1, __ATOMIC_RELAXED); | |
29 | __atomic_and_fetch(&x, 0x01, __ATOMIC_RELAXED); | |
30 | __atomic_or_fetch(&x, 0x01, __ATOMIC_RELAXED); | |
31 | __atomic_thread_fence(__ATOMIC_RELAXED); | |
32 | __atomic_signal_fence(__ATOMIC_RELAXED); | |
33 | ]) | |
34 | ],[ | |
35 | ae_cv_cc_atomic_builtins=yes | |
36 | ],[ | |
37 | ae_cv_cc_atomic_builtins=no | |
38 | ]) | |
39 | ] | |
40 | ) | |
41 | ||
42 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: | |
43 | if test "x$ae_cv_cc_atomic_builtins" = "xyes"; then | |
44 | $1 | |
45 | : | |
46 | else | |
47 | $2 | |
48 | : | |
49 | fi | |
50 | ||
51 | AC_LANG_POP | |
52 | ])dnl AE_CC_ATOMIC_BUILTINS |