1<aio.h>(P) POSIX Programmer's Manual <aio.h>(P)
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6 aio.h - asynchronous input and output (REALTIME)
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9 #include <aio.h>
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12 The <aio.h> header shall define the aiocb structure which shall include
13 at least the following members:
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16 int aio_fildes File descriptor.
17 off_t aio_offset File offset.
18 volatile void *aio_buf Location of buffer.
19 size_t aio_nbytes Length of transfer.
20 int aio_reqprio Request priority offset.
21 struct sigevent aio_sigevent Signal number and value.
22 int aio_lio_opcode Operation to be performed.
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24 This header shall also include the following constants:
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26 AIO_ALLDONE
27 A return value indicating that none of the requested operations
28 could be canceled since they are already complete.
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30 AIO_CANCELED
31 A return value indicating that all requested operations have
32 been canceled.
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34 AIO_NOTCANCELED
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36 A return value indicating that some of the requested operations
37 could not be canceled since they are in progress.
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39 LIO_NOP
40 A lio_listio() element operation option indicating that no
41 transfer is requested.
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43 LIO_NOWAIT
44 A lio_listio() synchronization operation indicating that the
45 calling thread is to continue execution while the lio_listio()
46 operation is being performed, and no notification is given when
47 the operation is complete.
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49 LIO_READ
50 A lio_listio() element operation option requesting a read.
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52 LIO_WAIT
53 A lio_listio() synchronization operation indicating that the
54 calling thread is to suspend until the lio_listio() operation is
55 complete.
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57 LIO_WRITE
58 A lio_listio() element operation option requesting a write.
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61 The following shall be declared as functions and may also be defined as
62 macros. Function prototypes shall be provided.
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65 int aio_cancel(int, struct aiocb *);
66 int aio_error(const struct aiocb *);
67 int aio_fsync(int, struct aiocb *);
68 int aio_read(struct aiocb *);
69 ssize_t aio_return(struct aiocb *);
70 int aio_suspend(const struct aiocb *const[], int,
71 const struct timespec *);
72 int aio_write(struct aiocb *);
73 int lio_listio(int, struct aiocb *restrict const[restrict], int,
74 struct sigevent *restrict);
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76 Inclusion of the <aio.h> header may make visible symbols defined in the
77 headers <fcntl.h>, <signal.h>, <sys/types.h>, and <time.h>.
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79 The following sections are informative.
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82 None.
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85 None.
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88 None.
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91 <fcntl.h> , <signal.h> , <sys/types.h> , <time.h> , the System Inter‐
92 faces volume of IEEE Std 1003.1-2001, fsync(), lseek(), read(), write()
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95 Portions of this text are reprinted and reproduced in electronic form
96 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
97 -- Portable Operating System Interface (POSIX), The Open Group Base
98 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
99 Electrical and Electronics Engineers, Inc and The Open Group. In the
100 event of any discrepancy between this version and the original IEEE and
101 The Open Group Standard, the original IEEE and The Open Group Standard
102 is the referee document. The original Standard can be obtained online
103 at http://www.opengroup.org/unix/online.html .
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107IEEE/The Open Group 2003 <aio.h>(P)