convenience SIG_ATOMIC_T macro definition

ares/setup_once.h

@@ -212,6 +212,17 @@ typedef int sig_atomic_t;
 #endif
 
 
+/*
+ * Convenience SIG_ATOMIC_T definition
+ */
+
+#ifdef HAVE_SIG_ATOMIC_T_VOLATILE
+#define SIG_ATOMIC_T static sig_atomic_t
+#else
+#define SIG_ATOMIC_T static volatile sig_atomic_t
+#endif
+
+
 /*
  * Default return type for signal handlers.
  */

lib/setup_once.h

@@ -219,6 +219,17 @@ typedef int sig_atomic_t;
 #endif
 
 
+/*
+ * Convenience SIG_ATOMIC_T definition
+ */
+
+#ifdef HAVE_SIG_ATOMIC_T_VOLATILE
+#define SIG_ATOMIC_T static sig_atomic_t
+#else
+#define SIG_ATOMIC_T static volatile sig_atomic_t
+#endif
+
+
 /*
  * Default return type for signal handlers.
  */