std::basic_ostream<CharT,Traits>::flush - cppreference.com (original) (raw)

Writes uncommitted changes to the underlying output sequence. Behaves as an UnformattedOutputFunction.

If rdbuf() is a null pointer, the sentry object is not constructed.

Otherwise, after constructing and checking the sentry object, calls rdbuf()->pubsync(). If the call returns -1, calls setstate(badbit).

[edit] Return value

*this

[edit] Exceptions

May throw std::ios_base::failure if (exceptions() & badbit) != 0.

[edit] Example

Output:

Output from main Output from thread... 1 2 3 4 5 6 7 8 9

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

[edit] See also

| | invokes sync() (public member function of std::basic_streambuf<CharT,Traits>) [edit] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | synchronizes the buffers with the associated character sequence (virtual protected member function of std::basic_streambuf<CharT,Traits>) [edit] | | | flushes the output stream (function template) [edit] | | | outputs '\n' and flushes the output stream (function template) [edit] | | | synchronizes with the underlying storage device (public member function of std::basic_istream<CharT,Traits>) [edit] |