Couple of random cleanup patches following async PR

src/device/usbd.c

@@ -803,10 +803,8 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr) {
         break;
     }
 
-#if CFG_TUSB_OS != OPT_OS_NONE && CFG_TUSB_OS != OPT_OS_PICO
-    // return if there is no more events, for application to run other background
-    if (osal_queue_empty(_usbd_q)) { return; }
-#endif
+    // allow to exit tud_task() if there is no event in the next run
+    timeout_ms = 0;
   }
 }
 

src/host/usbh.c

@@ -374,7 +374,8 @@ bool usbh_defer_func_ms_async(uint32_t ms, tusb_defer_func_t func, uintptr_t par
   TU_LOG_USBH("USBH schedule function after %u ms\r\n", (unsigned int)ms);
   _usbh_data.call_after.func  = func;
   _usbh_data.call_after.arg   = param;
-  _usbh_data.call_after.at_ms = tusb_time_millis_api() + ms;
+  // add one to ensure we wait at least 'ms' milliseconds
+  _usbh_data.call_after.at_ms = tusb_time_millis_api() + ms + 1;
   return true;
 }
 
@@ -610,11 +611,19 @@ bool tuh_task_event_ready(void) {
   }
 
   #if CFG_TUH_HUB
-  if (!osal_queue_empty(_usbh_daq)) {
+  if (_usbh_data.enumerating_daddr == TUSB_INDEX_INVALID_8 &&
+      !osal_queue_empty(_usbh_daq)) {
     return true;
   }
   #endif
 
+  if (_usbh_data.call_after.func) {
+    int32_t remain_ms = (int32_t)(_usbh_data.call_after.at_ms - tusb_time_millis_api());
+    if (remain_ms <= 0) {
+      return true;
+    }
+  }
+
   return false;
 }
 

src/osal/osal_mynewt.h

@@ -123,6 +123,24 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hd
   return os_mutex_release(mutex_hdl) == OS_OK;
 }
 
+TU_ATTR_ALWAYS_INLINE static inline os_time_t _osal_ms2tick(uint32_t msec) {
+  if (msec == OSAL_TIMEOUT_WAIT_FOREVER) {
+    return OS_TIMEOUT_NEVER;
+  }
+  if (msec == 0) {
+    return 0;
+  }
+
+  os_time_t ticks = os_time_ms_to_ticks32(msec);
+
+  // If 1 tick > 1 ms, still wait at least 1 tick for non-zero timeout.
+  if (ticks == 0) {
+    ticks = 1;
+  }
+
+  return ticks;
+}
+
 //--------------------------------------------------------------------+
 // QUEUE API
 //--------------------------------------------------------------------+
@@ -161,10 +179,11 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_delete(osal_queue_t qhdl) {
 }
 
 TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec) {
-  (void) msec; // os_eventq_get() does not take timeout, always behave as msec = WAIT_FOREVER
-
-  struct os_event* ev;
-  ev = os_eventq_get(&qhdl->evq);
+  struct os_eventq* evq = &qhdl->evq;
+  struct os_event* ev = os_eventq_poll(&evq, 1, _osal_ms2tick(msec));
+  if (!ev) {
+    return false;
+  }
 
   memcpy(data, ev->ev_arg, qhdl->item_sz); // copy message
   os_memblock_put(&qhdl->mpool, ev->ev_arg); // put back mem block

src/tusb_option.h

@@ -534,10 +534,6 @@
   #define CFG_TUSB_OS           OPT_OS_NONE
 #endif
 
-#ifndef CFG_TUSB_OS_HAS_SCHEDULER
-  #define CFG_TUSB_OS_HAS_SCHEDULER (CFG_TUSB_OS != OPT_OS_NONE && CFG_TUSB_OS != OPT_OS_PICO)
-#endif
-
 #ifndef CFG_TUSB_OS_INC_PATH
   #ifndef CFG_TUSB_OS_INC_PATH_DEFAULT
   #define CFG_TUSB_OS_INC_PATH_DEFAULT