std::basic_filebuf<CharT,Traits>::sync - cppreference.com (original) (raw)

| 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.

[edit] Parameters

(none)

[edit] Return value

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

[edit] Notes

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

[edit] Example

[edit] See also

| | invokes sync() (public member function of std::basic_streambuf<CharT,Traits>) [edit] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | synchronizes an output stream with the actual file (function) [edit] |