1AIO_SUSPEND(3) Linux Programmer's Manual AIO_SUSPEND(3)
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6 aio_suspend - wait for asynchronous I/O operation or timeout
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9 #include <aio.h>
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11 int aio_suspend(const struct aiocb * const aiocb_list[],
12 int nitems, const struct timespec *timeout);
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14 Link with -lrt.
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17 The aio_suspend() function suspends the calling thread until one of the
18 following occurs:
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20 * One or more of the asynchronous I/O requests in the list aiocb_list
21 has completed.
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23 * A signal is delivered.
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25 * timeout is not NULL and the specified time interval has passed.
26 (For details of the timespec structure, see nanosleep(2).)
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28 The nitems argument specifies the number of items in aiocb_list. Each
29 item in the list pointed to by aiocb_list must be either NULL (and then
30 is ignored), or a pointer to a control block on which I/O was initiated
31 using aio_read(3), aio_write(3), or lio_listio(3). (See aio(7) for a
32 description of the aiocb structure.)
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34 If CLOCK_MONOTONIC is supported, this clock is used to measure the
35 timeout interval (see clock_gettime(3)).
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38 If this function returns after completion of one of the I/O requests
39 specified in aiocb_list, 0 is returned. Otherwise, -1 is returned, and
40 errno is set to indicate the error.
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43 EAGAIN The call timed out before any of the indicated operations had
44 completed.
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46 EINTR The call was ended by signal (possibly the completion signal of
47 one of the operations we were waiting for); see signal(7).
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49 ENOSYS aio_suspend() is not implemented.
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52 The aio_suspend() function is available since glibc 2.1.
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55 For an explanation of the terms used in this section, see
56 attributes(7).
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58 ┌──────────────┬───────────────┬─────────┐
59 │Interface │ Attribute │ Value │
60 ├──────────────┼───────────────┼─────────┤
61 │aio_suspend() │ Thread safety │ MT-Safe │
62 └──────────────┴───────────────┴─────────┘
64 POSIX.1-2001, POSIX.1-2008.
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67 One can achieve polling by using a non-NULL timeout that specifies a
68 zero time interval.
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70 If one or more of the asynchronous I/O operations specified in
71 aiocb_list has already completed at the time of the call to aio_sus‐
72 pend(), then the call returns immediately.
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74 To determine which I/O operations have completed after a successful
75 return from aio_suspend(), use aio_error(3) to scan the list of aiocb
76 structures pointed to by aiocb_list.
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79 The glibc implementation of aio_suspend() is not async-signal-safe, in
80 violation of the requirements of POSIX.1.
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83 aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_return(3),
84 aio_write(3), lio_listio(3), aio(7), time(7)
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87 This page is part of release 5.07 of the Linux man-pages project. A
88 description of the project, information about reporting bugs, and the
89 latest version of this page, can be found at
90 https://www.kernel.org/doc/man-pages/.
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94 2017-09-15 AIO_SUSPEND(3)