add isWaiting for AdaMsg

Author: hathach

libraries/Bluefruit52Lib/src/utility/AdaMsg.cpp

@@ -36,15 +36,21 @@
 
 #include "AdaMsg.h"
 
-AdaMsg::AdaMsg(void)
+void AdaMsg::_init(void)
 {
   _dynamic = true;
+  _waiting = false;
   _sem     = NULL;
 
   buffer  = NULL;
   remaining = xferlen = 0;
 }
 
+AdaMsg::AdaMsg(void)
+{
+  _init();
+}
+
 // dynamic mean semaphore is malloced and freed only when in action
 void AdaMsg::begin(bool dynamic)
 {
@@ -58,6 +64,7 @@ void AdaMsg::begin(bool dynamic)
 void AdaMsg::stop(void)
 {
   if (!_dynamic) vSemaphoreDelete(_sem);
+  _init();
 }
 
 void AdaMsg::prepare(void* buf, uint16_t bufsize)
@@ -82,10 +89,12 @@ int32_t AdaMsg::waitUntilComplete(uint32_t ms)
 
   int result = -1;
 
+  _waiting = true;
   if ( xSemaphoreTake(_sem, ms2tick(ms) ) )
   {
     result = xferlen;
   }
+  _waiting = false;
 
   if (_dynamic)
   {
@@ -96,6 +105,11 @@ int32_t AdaMsg::waitUntilComplete(uint32_t ms)
   return result;
 }
 
+bool AdaMsg::isWaiting(void)
+{
+  return _waiting;
+}
+
 uint16_t AdaMsg::feed(void* data, uint16_t len)
 {
   len = min16(len, remaining);

libraries/Bluefruit52Lib/src/utility/AdaMsg.h

@@ -42,8 +42,11 @@ class AdaMsg
 {
   private:
     bool              _dynamic;
+    volatile bool     _waiting;
     SemaphoreHandle_t _sem;
 
+    void              _init(void);
+
   public:
     uint8_t*          buffer;
     uint16_t          remaining;
@@ -57,6 +60,7 @@ class AdaMsg
 
     void     prepare(void* buf, uint16_t bufsize);
     int32_t  waitUntilComplete(uint32_t ms);
+    bool     isWaiting(void);
 
     uint16_t feed(void* data, uint16_t len);
     void     complete(void);