bpo-39465: Add pycore_atomic_funcs.h header (GH-20766)
Add pycore_atomic_funcs.h internal header file: similar to
pycore_atomic.h but don't require to declare variables as atomic.
Add _Py_atomic_size_get() and _Py_atomic_size_set() functions.
diff --git a/configure b/configure
index f07edff..530c04a 100755
--- a/configure
+++ b/configure
@@ -15429,6 +15429,7 @@
fi
+
EXT_SUFFIX=.${SOABI}${SHLIB_SUFFIX}
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking LDVERSION" >&5
@@ -17095,16 +17096,17 @@
fi
-# Check for GCC >= 4.7 __atomic builtins
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for GCC >= 4.7 __atomic builtins" >&5
-$as_echo_n "checking for GCC >= 4.7 __atomic builtins... " >&6; }
+# Check for GCC >= 4.7 and clang __atomic builtin functions
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for builtin __atomic_load_n and __atomic_store_n functions" >&5
+$as_echo_n "checking for builtin __atomic_load_n and __atomic_store_n functions... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
- volatile int val = 1;
+ int val;
int main() {
- __atomic_load_n(&val, __ATOMIC_SEQ_CST);
+ __atomic_store_n(&val, 1, __ATOMIC_SEQ_CST);
+ (void)__atomic_load_n(&val, __ATOMIC_SEQ_CST);
return 0;
}