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std::basic_syncbuf<CharT,Traits,Allocator>::basic_syncbuf

From cppreference.com
< cpp‎ | io‎ | basic syncbuf
 
 
 
 
basic_syncbuf()
    : basic_syncbuf(nullptr)
(1)
explicit basic_syncbuf( streambuf_type* obuf )
    : basic_syncbuf( obuf, Allocator() ) {}
(2)
basic_syncbuf( streambuf_type* obuf, const Allocator& a);
(3)
basic_syncbuf( basic_syncbuf&& rhs);
(4)
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.

Contents

[edit] 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

[edit] Exceptions

2,3) May throw std::bad_alloc from the constructor of the internal temporary storage or std::system_error from the mutex construction.

[edit] Notes

Typically called by the appropriate constructors of std::basic_osyncstream.

[edit] Example

[edit] See also

[virtual]
synchronizes the buffers with the associated character sequence
(virtual protected member function of std::basic_streambuf<CharT,Traits>) [edit]
atomically transmits the entire internal buffer to the wrapped streambuf
(public member function) [edit]