1aio.h(0P)                  POSIX Programmer's Manual                 aio.h(0P)
2
3
4

PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
10
11

NAME

13       aio.h — asynchronous input and output
14

SYNOPSIS

16       #include <aio.h>
17

DESCRIPTION

19       The <aio.h> header  shall  define  the  aiocb  structure,  which  shall
20       include at least the following members:
21
22           int             aio_fildes     File descriptor.
23           off_t           aio_offset     File offset.
24           volatile void  *aio_buf        Location of buffer.
25           size_t          aio_nbytes     Length of transfer.
26           int             aio_reqprio    Request priority offset.
27           struct sigevent aio_sigevent   Signal number and value.
28           int             aio_lio_opcode Operation to be performed.
29
30       The  <aio.h> header shall define the off_t, pthread_attr_t, size_t, and
31       ssize_t types as described in <sys/types.h>.
32
33       The <aio.h> header  shall  define  the  struct  timespec  structure  as
34       described in <time.h>.
35
36       The  tag  sigevent  shall be declared as naming an incomplete structure
37       type, the contents of which are described in the <signal.h> header.
38
39       The <aio.h> header shall define the following symbolic constants:
40
41       AIO_ALLDONE   A return value indicating  that  none  of  the  requested
42                     operations  could be canceled since they are already com‐
43                     plete.
44
45       AIO_CANCELED  A return value indicating that all  requested  operations
46                     have been canceled.
47
48       AIO_NOTCANCELED
49                     A  return  value  indicating  that  some of the requested
50                     operations could  not  be  canceled  since  they  are  in
51                     progress.
52
53       LIO_NOP       A  lio_listio()  element operation option indicating that
54                     no transfer is requested.
55
56       LIO_NOWAIT    A lio_listio() synchronization operation indicating  that
57                     the  calling  thread  is  to continue execution while the
58                     lio_listio() operation is being performed, and no notifi‐
59                     cation is given when the operation is complete.
60
61       LIO_READ      A  lio_listio()  element  operation  option  requesting a
62                     read.
63
64       LIO_WAIT      A lio_listio() synchronization operation indicating  that
65                     the  calling  thread is to suspend until the lio_listio()
66                     operation is complete.
67
68       LIO_WRITE     A lio_listio()  element  operation  option  requesting  a
69                     write.
70
71       The following shall be declared as functions and may also be defined as
72       macros. Function prototypes shall be provided.
73
74           int      aio_cancel(int, struct aiocb *);
75           int      aio_error(const struct aiocb *);
76           int      aio_fsync(int, struct aiocb *);
77           int      aio_read(struct aiocb *);
78           ssize_t  aio_return(struct aiocb *);
79           int      aio_suspend(const struct aiocb *const [], int,
80                        const struct timespec *);
81           int      aio_write(struct aiocb *);
82           int      lio_listio(int, struct aiocb *restrict const [restrict], int,
83                        struct sigevent *restrict);
84
85       Inclusion of the <aio.h> header may make visible symbols defined in the
86       headers <fcntl.h>, <signal.h>, and <time.h>.
87
88       The following sections are informative.
89

APPLICATION USAGE

91       None.
92

RATIONALE

94       None.
95

FUTURE DIRECTIONS

97       None.
98

SEE ALSO

100       <fcntl.h>, <signal.h>, <sys_types.h>, <time.h>
101
102       The   System   Interfaces   volume   of   POSIX.1‐2008,   aio_cancel(),
103       aio_error(),  aio_fsync(),  aio_read(),  aio_return(),   aio_suspend(),
104       aio_write(), fsync(), lio_listio(), lseek(), read(), write()
105

107       Portions  of  this text are reprinted and reproduced in electronic form
108       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
109       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
110       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
111       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
112       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
113       event of any discrepancy between this version and the original IEEE and
114       The Open Group Standard, the original IEEE and The Open Group  Standard
115       is  the  referee document. The original Standard can be obtained online
116       at http://www.unix.org/online.html .
117
118       Any typographical or formatting errors that appear  in  this  page  are
119       most likely to have been introduced during the conversion of the source
120       files to man page format. To report such errors,  see  https://www.ker‐
121       nel.org/doc/man-pages/reporting_bugs.html .
122
123
124
125IEEE/The Open Group                  2013                            aio.h(0P)
Impressum