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.
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
|
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) |