асинхронная синхронизация файлов (asynchronous file synchronization)
Имя (Name)
aio_fsync - asynchronous file synchronization
Синопсис (Synopsis)
#include <aio.h>
int aio_fsync(int op, struct aiocb *aiocbp);
Link with -lrt.
Описание (Description)
The aio_fsync() function does a sync on all outstanding
asynchronous I/O operations associated with aiocbp->aio_fildes.
(See aio(7) for a description of the aiocb structure.)
More precisely, if op is O_SYNC, then all currently queued I/O
operations shall be completed as if by a call of fsync(2), and if
op is O_DSYNC, this call is the asynchronous analog of
fdatasync(2).
Note that this is a request only; it does not wait for I/O
completion.
Apart from aio_fildes, the only field in the structure pointed to
by aiocbp that is used by this call is the aio_sigevent field (a
sigevent structure, described in sigevent(7)), which indicates
the desired type of asynchronous notification at completion. All
other fields are ignored.
Возвращаемое значение (Return value)
On success (the sync request was successfully queued) this
function returns 0. On error, -1 is returned, and errno is set
to indicate the error.
Ошибки (Error)
EAGAIN Out of resources.
EBADF aio_fildes is not a valid file descriptor open for
writing.
EINVAL Synchronized I/O is not supported for this file, or op is
not O_SYNC or O_DSYNC.
ENOSYS aio_fsync() is not implemented.
Версии (Versions)
The aio_fsync() function is available since glibc 2.1.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│aio_fsync() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Смотри также (See also)
aio_cancel(3), aio_error(3), aio_read(3), aio_return(3),
aio_suspend(3), aio_write(3), lio_listio(3), aio(7), sigevent(7)
