Simplified cancel behavior (#4224)

inference-engine/include/cpp/ie_infer_request.hpp

@@ -162,10 +162,13 @@ public:
         CALL_STATUS_FNC_NO_ARGS(Infer);
     }
 
-    StatusCode Cancel() {
-        ResponseDesc resp;
-        if (actual == nullptr) THROW_IE_EXCEPTION << "InferRequest was not initialized.";
-        return actual->Cancel(&resp);
+    /**
+     * @copybrief IInferRequest::Cancel
+     *
+     * Wraps IInferRequest::Cancel
+     */
+    void Cancel() {
+        CALL_STATUS_FNC_NO_ARGS(Cancel);
     }
 
     /**

inference-engine/include/details/ie_exception_conversion.hpp

@@ -60,6 +60,8 @@ inline void extract_exception(StatusCode status, const char* msg) {
         throw InferNotStarted(msg);
     case NETWORK_NOT_READ:
         throw NetworkNotRead(msg);
+    case INFER_CANCELLED:
+        throw InferCancelled(msg);
     default:
         THROW_IE_EXCEPTION << msg << InferenceEngine::details::as_status << status;
     }

inference-engine/include/ie_common.h

@@ -334,6 +334,11 @@ class NetworkNotRead : public std::logic_error {
     using std::logic_error::logic_error;
 };
 
+/** @brief This class represents StatusCode::INFER_CANCELLED exception */
+class InferCancelled : public std::logic_error {
+    using std::logic_error::logic_error;
+};
+
 }  // namespace InferenceEngine
 
 #if defined(_WIN32)