2 files changed, 14 insertions, 0 deletions
diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp
index 94fb68450c..fbee1a223f 100644
--- a/src/corelib/io/qiodevice.cpp
+++ b/src/corelib/io/qiodevice.cpp
@@ -739,6 +739,18 @@ void QIODevicePrivate::setWriteChannelCount(int count)
 }
 
 /*!
+    \internal
+*/
+bool QIODevicePrivate::allWriteBuffersEmpty() const
+{
+    for (const QRingBuffer &ringBuffer : writeBuffers) {
+        if (!ringBuffer.isEmpty())
+            return false;
+    }
+    return true;
+}
+
+/*!
     Opens the device and sets its OpenMode to \a mode. Returns \c true if successful;
     otherwise returns \c false. This function should be called from any
     reimplementations of open() or other functions that open the device.
diff --git a/src/corelib/io/qiodevice_p.h b/src/corelib/io/qiodevice_p.h
index eed98a8fe3..76bec89ef2 100644
--- a/src/corelib/io/qiodevice_p.h
+++ b/src/corelib/io/qiodevice_p.h
@@ -154,6 +154,8 @@ public:
         return buffer.isEmpty() || (transactionStarted && isSequential()
                                     && transactionPos == buffer.size());
     }
+    bool allWriteBuffersEmpty() const;
+
     void seekBuffer(qint64 newPos);
 
     inline void setCurrentReadChannel(int channel)