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author | Yann Ylavic <ylavic@apache.org> | 2022-06-26 22:50:09 +0000 |
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committer | Yann Ylavic <ylavic@apache.org> | 2022-06-26 22:50:09 +0000 |
commit | 849781e74f9b6c2d6403ca834227167735480020 (patch) | |
tree | e211df96d33a97656047c2571c2baf97942d6e06 /configure.in | |
parent | ff9883c921fcb1bbf21e19f7a739e00b0c74da68 (diff) | |
download | apr-849781e74f9b6c2d6403ca834227167735480020.tar.gz |
atomic: Detect 32bit and 64bit atomic builtins separately.
Some 32bit platforms provide 32bit but not 64bit atomics, detect and
distinctly set/use HAVE_ATOMIC_BUILTINS/HAVE_ATOMIC_BUILTINS64 and
USE_ATOMICS_BUILTINS/USE_ATOMICS_BUILTINS64.
These platforms NEED_ATOMICS_GENERIC64 as 64bit implementation.
* configure.in():
Use stdint.h's uint{32,64}_t as atomic type for testing atomic builtins
when available, otherwise "unsigned int" for 32bit testing and
"unsigned long long" as 64bit.
* configure.in():
AC_TRY_RUN each 32bit and 64bit type separately, the former determining
HAVE_ATOMIC_BUILTINS and the latter HAVE_ATOMIC_BUILTINS64.
* include/arch/unix/apr_arch_atomic.h():
Define USE_ATOMICS_BUILTINS64 when HAVE_ATOMIC_BUILTINS64, otherise
define NEED_ATOMICS_GENERIC64
* include/arch/unix/apr_arch_atomic.h():
Check defined(__powerpc__) for USE_ATOMICS_PPC.
* atomic/unix/builtins64.c():
Implement for USE_ATOMICS_BUILTINS64 only.
BZ 63566.
git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1902266 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'configure.in')
-rw-r--r-- | configure.in | 101 |
1 files changed, 95 insertions, 6 deletions
diff --git a/configure.in b/configure.in index cd5fe78d7..653d2597b 100644 --- a/configure.in +++ b/configure.in @@ -485,11 +485,18 @@ case "$host:$CC" in ;; esac -AC_CACHE_CHECK([whether the compiler provides atomic builtins], [ap_cv_atomic_builtins], +AC_CACHE_CHECK([whether the compiler provides 32bit atomic builtins], [ap_cv_atomic_builtins], [AC_TRY_RUN([ +#if HAVE_STDINT_H +#include <stdint.h> +#endif int main(int argc, const char *const *argv) { - unsigned long val = 1010, tmp, *mem = &val; +#if HAVE_STDINT_H + uint32_t val = 1010, tmp, *mem = &val; +#else + unsigned int val = 1010, tmp, *mem = &val; +#endif if (__sync_fetch_and_add(&val, 1010) != 1010 || val != 2020) return 1; @@ -515,11 +522,18 @@ int main(int argc, const char *const *argv) return 0; }], [ap_cv_atomic_builtins=yes], [ap_cv_atomic_builtins=no], [ap_cv_atomic_builtins=no])]) -AC_CACHE_CHECK([whether the compiler provides __atomic builtins], [ap_cv__atomic_builtins], +AC_CACHE_CHECK([whether the compiler provides 32bit __atomic builtins], [ap_cv__atomic_builtins], [AC_TRY_RUN([ +#if HAVE_STDINT_H +#include <stdint.h> +#endif int main(int argc, const char *const *argv) { - unsigned long val = 1010, tmp, *mem = &val, *ptmp; +#if HAVE_STDINT_H + uint32_t val = 1010, tmp, *mem = &val, *ptmp; +#else + unsigned int val = 1010, tmp, *mem = &val, *ptmp; +#endif if (__atomic_fetch_add(&val, 1010, __ATOMIC_SEQ_CST) != 1010 || val != 2020) return 1; @@ -548,9 +562,84 @@ int main(int argc, const char *const *argv) }], [ap_cv__atomic_builtins=yes], [ap_cv__atomic_builtins=no], [ap_cv__atomic_builtins=no])]) if test "$ap_cv_atomic_builtins" = "yes" -o "$ap_cv__atomic_builtins" = "yes"; then - AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [Define if compiler provides atomic builtins]) + AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [Define if compiler provides 32bit atomic builtins]) if test "$ap_cv__atomic_builtins" = "yes"; then - AC_DEFINE(HAVE__ATOMIC_BUILTINS, 1, [Define if compiler provides __atomic builtins]) + AC_DEFINE(HAVE__ATOMIC_BUILTINS, 1, [Define if compiler provides 32bit __atomic builtins]) + fi +fi + +AC_CACHE_CHECK([whether the compiler provides 64bit atomic builtins], [ap_cv_atomic_builtins64], +[AC_TRY_RUN([ +#if HAVE_STDINT_H +#include <stdint.h> +#endif +int main(int argc, const char *const *argv) +{ +#if HAVE_STDINT_H + uint64_t val = 1010, tmp, *mem = &val; +#else + unsigned long long val = 1010, tmp, *mem = &val; +#endif + + if (__sync_fetch_and_add(&val, 1010) != 1010 || val != 2020) + return 1; + + tmp = val; + if (__sync_fetch_and_sub(mem, 1010) != tmp || val != 1010) + return 1; + + if (__sync_sub_and_fetch(&val, 1010) != 0 || val != 0) + return 1; + + tmp = 3030; + if (__sync_val_compare_and_swap(mem, 0, tmp) != 0 || val != tmp) + return 1; + + __sync_synchronize(); + if (__sync_lock_test_and_set(&val, 4040) != 3030) + return 1; + + return 0; +}], [ap_cv_atomic_builtins64=yes], [ap_cv_atomic_builtins64=no], [ap_cv_atomic_builtins64=no])]) + +AC_CACHE_CHECK([whether the compiler provides 64bit __atomic builtins], [ap_cv__atomic_builtins64], +[AC_TRY_RUN([ +#if HAVE_STDINT_H +#include <stdint.h> +#endif +int main(int argc, const char *const *argv) +{ +#if HAVE_STDINT_H + uint64_t val = 1010, tmp, *mem = &val; +#else + unsigned long long val = 1010, tmp, *mem = &val; +#endif + + if (__atomic_fetch_add(&val, 1010, __ATOMIC_SEQ_CST) != 1010 || val != 2020) + return 1; + + tmp = val; + if (__atomic_fetch_sub(mem, 1010, __ATOMIC_SEQ_CST) != tmp || val != 1010) + return 1; + + if (__atomic_sub_fetch(&val, 1010, __ATOMIC_SEQ_CST) != 0 || val != 0) + return 1; + + tmp = val; + if (!__atomic_compare_exchange_n(mem, &tmp, 3030, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) + || tmp != 0) + return 1; + + if (__atomic_exchange_n(&val, 4040, __ATOMIC_SEQ_CST) != 3030) + return 1; + + return 0; +}], [ap_cv__atomic_builtins64=yes], [ap_cv__atomic_builtins64=no], [ap_cv__atomic_builtins64=no])]) + +if test "$ap_cv_atomic_builtins64" = "yes" -o "$ap_cv__atomic_builtins64" = "yes"; then + AC_DEFINE(HAVE_ATOMIC_BUILTINS64, 1, [Define if compiler provides 64bit atomic builtins]) + if test "$ap_cv__atomic_builtins64" = "yes"; then + AC_DEFINE(HAVE__ATOMIC_BUILTINS64, 1, [Define if compiler provides 64bit __atomic builtins]) fi fi |