1aio_suspend(3C) Standard C Library Functions aio_suspend(3C)
2
6 aio_suspend - wait for asynchronous I/O request
7
9 #include <aio.h>
10 int aio_suspend(const struct aiocb * const list[], int nent,
12 const struct timespec *timeout);
13
16 The aio_suspend() function suspends the calling thread until at least
17 one of the asynchronous I/O operations referenced by the list argument
18 has completed, until a signal interrupts the function, or, if timeout
19 is not NULL, until the time interval specified by timeout has passed.
20 If any of the aiocb structures in the list correspond to completed
21 asynchronous I/O operations (that is, the error status for the opera‐
22 tion is not equal to EINPROGRESS) at the time of the call, the function
23 returns without suspending the calling thread. The list argument is an
24 array of pointers to asynchronous I/O control blocks. The nent argument
25 indicates the number of elements in the array and is limited to
26 _AIO_LISTIO_MAX = 4096. Each aiocb structure pointed to will have been
27 used in initiating an asynchronous I/O request via aio_read(3C),
28 aio_write(3C), or lio_listio(3C). This array may contain null pointers,
29 which are ignored. If this array contains pointers that refer to aiocb
30 structures that have not been used in submitting asynchronous I/O, the
31 effect is undefined.
32 If the time interval indicated in the timespec structure pointed to by
35 timeout passes before any of the I/O operations referenced by list are
36 completed, then aio_suspend() returns with an error.
37
39 If aio_suspend() returns after one or more asynchronous I/O operations
40 have completed, it returns 0. Otherwise, it returns −1, and sets errno
41 to indicate the error.
42 The application may determine which asynchronous I/O completed by scan‐
45 ning the associated error and return status using aio_error(3C) and
46 aio_return(3C), respectively.
47
49 The aio_suspend() function will fail if:
50 EAGAIN No asynchronous I/O indicated in the list referenced by list
52 completed in the time interval indicated by timeout.
53 EINTR A signal interrupted the aio_suspend() function. Since each
56 asynchronous I/O operation might provoke a signal when it
57 completes, this error return can be caused by the completion
58 of one or more of the very I/O operations being awaited.
59 EINVAL The nent argument is less than or equal to 0 or greater than
62 _AIO_LISTIO_MAX, or the timespec structure pointed to by
63 timeout is not properly set because tv_sec is less than 0 or
64 tv_nsec is either less than 0 or greater than 10^9.
65 ENOMEM There is currently not enough available memory; the applica‐
68 tion can try again later.
69 ENOSYS The aio_suspend() function is not supported by the system.
72
75 The aio_suspend() function has a transitional interface for 64-bit file
76 offsets. See lf64(5).
77
79 See attributes(5) for descriptions of the following attributes:
80 ┌─────────────────────────────┬─────────────────────────────┐
85 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
86 ├─────────────────────────────┼─────────────────────────────┤
87 │Interface Stability │Committed │
88 ├─────────────────────────────┼─────────────────────────────┤
89 │MT-Level │Async-Signal-Safe │
90 ├─────────────────────────────┼─────────────────────────────┤
91 │Standard │See standards(5). │
92 └─────────────────────────────┴─────────────────────────────┘
93
95 aio.h(3HEAD), aio_fsync(3C), aio_read(3C), aio_return(3C),
96 aio_write(3C), lio_listio(3C), signal.h(3HEAD), attributes(5), lf64(5),
97 standards(5)
98
100 Solaris 2.6 was the first release to support the Asynchronous Input and
101 Output option. Prior to this release, this function always returned −1
102 and set errno to ENOSYS.
103SunOS 5.11 18 Dec 2008 aio_suspend(3C)