make druid_shell::util functions pub(crate)

druid-shell/src/util.rs

@@ -32,7 +32,7 @@ fn current_thread_id() -> u64 {
 /// # Panics
 ///
 /// Panics when called from a non-main thread and main thread is claimed.
-pub fn assert_main_thread_or_main_unclaimed() {
+pub(crate) fn assert_main_thread_or_main_unclaimed() {
     let thread_id = current_thread_id();
     let main_thread_id = MAIN_THREAD_ID.load(Ordering::Acquire);
     if thread_id != main_thread_id && main_thread_id != 0 {
@@ -48,7 +48,7 @@ pub fn assert_main_thread_or_main_unclaimed() {
 /// # Panics
 ///
 /// Panics if the main thread has already been claimed by another thread.
-pub fn claim_main_thread() {
+pub(crate) fn claim_main_thread() {
     let thread_id = current_thread_id();
     let old_thread_id =
         MAIN_THREAD_ID.compare_exchange(0, thread_id, Ordering::AcqRel, Ordering::Acquire);
@@ -70,7 +70,7 @@ pub fn claim_main_thread() {
 /// # Panics
 ///
 /// Panics if the main thread status is owned by another thread.
-pub fn release_main_thread() {
+pub(crate) fn release_main_thread() {
     let thread_id = current_thread_id();
     let old_thread_id =
         MAIN_THREAD_ID.compare_exchange(thread_id, 0, Ordering::AcqRel, Ordering::Acquire);