std::basic_syncbuf<CharT,Traits,Allocator>::basic_syncbuf
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1) Default constructor: creates an instance of
std::basic_syncbuf with emit-on-sync policy set to false, wrapped streambuffer set to nullptr, and using default-constructed Allocator as the allocator for temporary storage.
2,3) 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.
4) 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
2,3) 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
See also
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[virtual]
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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) |
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