std::basic_filebuf<CharT,Traits>::sync (3) - Linux Manuals

std::basic_filebuf<CharT,Traits>::sync: std::basic_filebuf<CharT,Traits>::sync

NAME

std::basic_filebuf<CharT,Traits>::sync - std::basic_filebuf<CharT,Traits>::sync

Synopsis


protected:
virtual int sync()


If a put area exists (e.g. the file was opened for writing), calls overflow() to write all pending output to the file, then flushes the file as if by calling std::fflush.
If a get area exists (e.g. the file was opened for reading), the effect is implementation-defined. Typical implementation may empty out the get area and move the current file position back by the corresponding number of bytes.

Parameters


(none)

Return value


0 in case of success, -1 in case of failure.

Notes


sync() or its equivalent is implicitly called for output streams by close(), seekoff(), and seekpos() and explicitly called by std::basic_streambuf::pubsync()

Example


 This section is incomplete
 Reason: no example

See also


        invokes sync()
pubsync (public member function of std::basic_streambuf<CharT,Traits>)
        synchronizes an output stream with the actual file
fflush (function)

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