Furi: getter for current thread stdout write callback (#2344)

furi/core/thread.c

@@ -530,6 +530,12 @@ bool furi_thread_set_stdout_callback(FuriThreadStdoutWriteCallback callback) {
     return true;
 }
 
+FuriThreadStdoutWriteCallback furi_thread_get_stdout_callback() {
+    FuriThread* thread = furi_thread_get_current();
+
+    return thread->output.write_callback;
+}
+
 size_t furi_thread_stdout_write(const char* data, size_t size) {
     FuriThread* thread = furi_thread_get_current();
 

furi/core/thread.h

@@ -227,6 +227,12 @@ const char* furi_thread_get_name(FuriThreadId thread_id);
 
 uint32_t furi_thread_get_stack_space(FuriThreadId thread_id);
 
+/** Get STDOUT callback for thead
+ *
+ * @return STDOUT callback
+ */
+FuriThreadStdoutWriteCallback furi_thread_get_stdout_callback();
+
 /** Set STDOUT callback for thread
  * 
  * @param      callback  callback or NULL to clear