дождитесь асинхронной операции ввода-вывода или тайм-аута (wait for asynchronous I/O operation or timeout)
Имя (Name)
aio_suspend - wait for asynchronous I/O operation or timeout
Синопсис (Synopsis)
#include <aio.h>
int aio_suspend(const struct aiocb *const aiocb_list[], int nitems,
const struct timespec *restrict timeout);
Link with -lrt.
Описание (Description)
The aio_suspend() function suspends the calling thread until one
of the following occurs:
* One or more of the asynchronous I/O requests in the list
aiocb_list has completed.
* A signal is delivered.
* timeout is not NULL and the specified time interval has
passed. (For details of the timespec structure, see
nanosleep(2).)
The nitems argument specifies the number of items in aiocb_list.
Each item in the list pointed to by aiocb_list must be either
NULL (and then is ignored), or a pointer to a control block on
which I/O was initiated using aio_read(3), aio_write(3), or
lio_listio(3). (See aio(7) for a description of the aiocb
structure.)
If CLOCK_MONOTONIC is supported, this clock is used to measure
the timeout interval (see clock_gettime(2)).
Возвращаемое значение (Return value)
If this function returns after completion of one of the I/O
requests specified in aiocb_list, 0 is returned. Otherwise, -1
is returned, and errno is set to indicate the error.
Ошибки (Error)
EAGAIN The call timed out before any of the indicated operations
had completed.
EINTR The call was ended by signal (possibly the completion
signal of one of the operations we were waiting for); see
signal(7).
ENOSYS aio_suspend() is not implemented.
Версии (Versions)
The aio_suspend() 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_suspend() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
POSIX doesn't specify the parameters to be restrict; that is
specific to glibc.
Примечание (Note)
One can achieve polling by using a non-NULL timeout that
specifies a zero time interval.
If one or more of the asynchronous I/O operations specified in
aiocb_list has already completed at the time of the call to
aio_suspend(), then the call returns immediately.
To determine which I/O operations have completed after a
successful return from aio_suspend(), use aio_error(3) to scan
the list of aiocb structures pointed to by aiocb_list.
Ошибки (баги) (Bugs)
The glibc implementation of aio_suspend() is not async-signal-
safe, in violation of the requirements of POSIX.1.
Смотри также (See also)
aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3),
aio_return(3), aio_write(3), lio_listio(3), aio(7), time(7)
