03-add-tud_task_is_queue_empty.patch

Add `tud_task_is_queue_empty()` function

From: Rajiv Ranganath <rajiv.ranganath@atihita.com>

Signed-off-by: Rajiv Ranganath <rajiv.ranganath@atihita.com>
---
 src/device/usbd.c    |    6 ++++++
 src/osal/osal_none.h |   10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/device/usbd.c b/src/device/usbd.c
index 16670b94..b846ea5d 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -330,6 +330,12 @@ static void usbd_reset(uint8_t rhport)
   }
 }
 
+extern bool osal_queue_is_empty(osal_queue_t const qhdl);
+
+bool tud_task_is_queue_empty(void) {
+  return osal_queue_is_empty(_usbd_q);
+}
+
 /* USB Device Driver task
  * This top level thread manages all device controller event and delegates events to class-specific drivers.
  * This should be called periodically within the mainloop or rtos thread.
diff --git a/src/osal/osal_none.h b/src/osal/osal_none.h
index b27e628a..de266a1c 100644
--- a/src/osal/osal_none.h
+++ b/src/osal/osal_none.h
@@ -203,6 +203,16 @@ static inline bool osal_queue_send(osal_queue_t const qhdl, void const * data, b
   return success;
 }
 
+// non blocking
+static inline bool osal_queue_is_empty(osal_queue_t const qhdl)
+{
+  _osal_q_lock(qhdl);
+  bool is_empty = tu_fifo_empty(&qhdl->ff);
+  _osal_q_unlock(qhdl);
+
+  return is_empty;
+}
+
 #ifdef __cplusplus
  }
 #endif