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-rw-r--r--net/base/file_stream.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/base/file_stream.h b/net/base/file_stream.h
index b98cb15..ccdcf80 100644
--- a/net/base/file_stream.h
+++ b/net/base/file_stream.h
@@ -69,6 +69,8 @@ class FileStream {
// progress. That will cancel the read and allow the buffer to be freed.
//
// This method should not be called if the stream was opened WRITE_ONLY.
+ //
+ // You can pass NULL as the callback for synchronous I/O.
int Read(char* buf, int buf_len, CompletionCallback* callback);
// Call this method to write data at the current stream position. Up to
@@ -88,6 +90,8 @@ class FileStream {
// progress. That will cancel the write and allow the buffer to be freed.
//
// This method should not be called if the stream was opened READ_ONLY.
+ //
+ // You can pass NULL as the callback for synchronous I/O.
int Write(const char* buf, int buf_len, CompletionCallback* callback);
private: