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fea681da | 1 | .\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl) |
0cae8d0c | 2 | .\" and Copyright (C) 2010 Michael kerrisk <mtk.manpages@gmail.com> |
fea681da MK |
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17 | .\" GNU General Public License for more details. | |
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20 | .\" License along with this manual; if not, write to the Free | |
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25fa6c3d | 24 | .TH AIO_SUSPEND 3 2010-10-02 "" "Linux Programmer's Manual" |
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25 | .SH NAME |
26 | aio_suspend \- wait for asynchronous I/O operation or timeout | |
27 | .SH SYNOPSIS | |
28 | .nf | |
29 | .sp | |
30 | .B "#include <aio.h>" | |
31 | .sp | |
0cae8d0c | 32 | .BI "int aio_suspend(const struct aiocb * const " aiocb_list [], |
fea681da | 33 | .br |
0cae8d0c | 34 | .BI " int " nitems ", const struct timespec *" timeout ); |
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35 | .sp |
36 | Link with \fI\-lrt\fP. | |
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37 | .fi |
38 | .SH DESCRIPTION | |
39 | The | |
e511ffb6 | 40 | .BR aio_suspend () |
0cae8d0c MK |
41 | function suspends the calling thread until one of the following occurs: |
42 | .IP * 3 | |
43 | One or more of the asynchronous I/O requests in the list | |
44 | .I aiocb_list | |
45 | has completed. | |
46 | .IP * | |
47 | A signal is delivered. | |
48 | .IP * | |
fea681da | 49 | .I timeout |
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50 | is not NULL and the specified time interval has passed. |
51 | (For details of the | |
52 | .I timespec | |
53 | structure, see | |
54 | .BR nanosleep (2).) | |
fea681da | 55 | .LP |
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56 | The |
57 | .I nitems | |
58 | argument specifies the number of items in | |
59 | .IR aiocb_list . | |
60 | Each item in the list pointed to by | |
61 | .I aiocb_list | |
62 | must be either NULL (and then is ignored), | |
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63 | or a pointer to a control block on which I/O was initiated using |
64 | .BR aio_read (3), | |
65 | .BR aio_write (3), | |
66 | or | |
67 | .BR lio_listio (3). | |
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68 | (See |
69 | .BR aio (7) | |
70 | for a description of the | |
71 | .I aiocb | |
72 | structure.) | |
fea681da | 73 | .LP |
2f0af33b MK |
74 | If |
75 | .B CLOCK_MONOTONIC | |
76 | is supported, this clock is used to measure | |
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77 | the timeout interval (see |
78 | .BR clock_gettime (3)). | |
fea681da | 79 | .SH "RETURN VALUE" |
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80 | If this function returns after completion of one of the I/O |
81 | requests specified in | |
82 | .IR aiocb_list , | |
83 | 0 is returned. | |
84 | Otherwise, \-1 is returned, and | |
fea681da | 85 | .I errno |
0cae8d0c | 86 | is set to indicate the error. |
fea681da MK |
87 | .SH ERRORS |
88 | .TP | |
89 | .B EAGAIN | |
0cae8d0c | 90 | The call timed out before any of the indicated operations |
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91 | had completed. |
92 | .TP | |
93 | .B EINTR | |
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94 | The call was ended by signal |
95 | (possibly the completion signal of one of the operations we were | |
96 | waiting for); see | |
76e533c4 | 97 | .BR signal (7). |
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98 | .SH VERSIONS |
99 | The | |
100 | .BR aio_suspend () | |
101 | function is available since glibc 2.1. | |
2b2581ee | 102 | .SH "CONFORMING TO" |
793514ae | 103 | POSIX.1-2001, POSIX.1-2008. |
19c98696 | 104 | .SH NOTES |
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105 | One can achieve polling by using a non-NULL |
106 | .I timeout | |
107 | that specifies a zero time interval. | |
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108 | |
109 | If one or more of the asynchronous I/O operations specified in | |
110 | .IR aiocb_list | |
111 | has already completed at the time of the call to | |
112 | .BR aio_suspend (), | |
113 | then the call returns immediately. | |
114 | ||
115 | To determine which I/O operations have completed | |
116 | after a successful return from | |
117 | .BR aio_suspend (), | |
118 | use | |
119 | .BR aio_error (3) | |
120 | to scan the list of | |
121 | .I aiocb | |
122 | structures pointed to by | |
123 | .IR aiocb_list . | |
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124 | .SH "SEE ALSO" |
125 | .BR aio_cancel (3), | |
126 | .BR aio_error (3), | |
127 | .BR aio_fsync (3), | |
128 | .BR aio_read (3), | |
129 | .BR aio_return (3), | |
1d7c4d16 | 130 | .BR aio_write (3), |
25fa6c3d | 131 | .BR aio (7), |
1d7c4d16 | 132 | .BR time (7) |