std::basic_syncbuf<CharT,Traits,Allocator>::basic_syncbuf
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< cpp | io | basic syncbuf
| explicit basic_syncbuf( streambuf_type* obuf = nullptr ) : basic_syncbuf( obuf, Allocator() ) {} |
(1) | |
| basic_syncbuf( streambuf_type* obuf, const Allocator& a); |
(2) | |
| basic_syncbuf( basic_syncbuf&& rhs); |
(3) | |
1,2) Creates an instance of
std::basic_syncbuf with emit-on-sync policy set to false, wrapped streambuffer set to obuf, and using a as the allocator for temporary storage. 3) Move constructor: move-constructs a
std::basic_syncbuf object by moving all contents from another std::basic_syncbuf object rhs, including the temporary storage, the wrapped stream pointer, policy, and all other state (such as the mutex pointer). After move, rhs is not associated with a stream, and rhs.get_wrapped()==nullptr. The put area member pointers of the base class std::basic_streambuf of rhs are guaranteed to be null. Destroying a moved-from rhs will not produce any output.Parameters
| obuf | - | pointer to the std::basic_streambuf to wrap |
| a | - | the allocator to use for temporary storage |
| rhs | - | another std::basic_syncbuf to move from |
Exceptions
1,2) May throw std::bad_alloc from the constructor of the internal temporary storage or std::system_error from the mutex construction.
Notes
Typically called by the appropriate constructors of std::basic_osyncstream.
Example
| This section is incomplete Reason: no example |
See also
| [virtual] |
synchronizes the buffers with the associated character sequence (virtual protected member function of std::basic_streambuf<CharT,Traits>) |
| atomically transmits the entire internal buffer to the wrapped streambuf (public member function) |