Rename signal_handler.odin to signal_handler_libc.odin

core/testing/signal_handler_libc.odin

@@ -0,0 +1,19 @@
+//+private
+//+build windows, linux, darwin, freebsd, openbsd, netbsd, haiku
+package testing
+
+import "base:intrinsics"
+import "core:c/libc"
+
+@(private="file")
+abort_flag: libc.sig_atomic_t
+
+setup_signal_handler :: proc() {
+	libc.signal(libc.SIGINT, proc "c" (sig: libc.int) {
+		intrinsics.atomic_add(&abort_flag, 1)
+	})
+}
+
+should_abort :: proc() -> bool {
+	return intrinsics.atomic_load(&abort_flag) > 0
+}