Improved savefile error handling:

* New flush() method in WriteStream class to flush pending I/O, in order
  to detect any I/O errors

* Use of flush() and ioFailed() added to scumm engine save function

* Dreamcast backend extended to support the new checks

svn-id: r19066

1 files changed, 6 insertions, 0 deletions

diff --git a/common/stream.h b/common/stream.h
index a89e5475dd..32688e08ff 100644
--- a/common/stream.h
+++ b/common/stream.h
@@ -67,6 +67,12 @@ public:
 	 */
 	virtual uint32 write(const void *dataPtr, uint32 dataSize) = 0;
 
+	/**
+	 * Commit any buffered data to the underlying channel or
+	 * storage medium; unbuffered streams can use the default
+	 * implementation.
+	 */
+	virtual void flush() {}
 
 	// The remaining methods all have default implementations; subclasses
 	// need not (and should not) overload them.