source: rtems/cpukit/posix/include/aio.h @ f22ebf0

4.104.114.84.95
Last change on this file since f22ebf0 was c8cfdcfe, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 26, 1999 at 6:04:46 PM

Recovered changes since CVS file was corrupted.

  • Property mode set to 100644
File size: 3.2 KB
Line 
1/* aio.h
2 *
3 *  $Id$
4 */
5
6#ifndef __POSIX_ASYNCHRONOUS_IO_h
7#define __POSIX_ASYNCHRONOUS_IO_h
8
9#ifdef __cplusplus
10extern "C" {
11#endif
12
13#include <sys/features.h>
14
15#if defined(_POSIX_ASYNCHRONOUS_IO)
16
17/*
18 *  6.7.1 Data Definitions for Asynchronous Input and Output,
19 *        P1003.1b-1993, p. 151
20 */
21
22#include <sys/types.h>
23#include <signal.h>
24#include <time.h>
25#include <fcntl.h>
26
27/*
28 *  6.7.1.2 Manifest Constants, P1003.1b-1993, p. 153
29 */
30
31#define AIO_CANCELED    0 /* all requested operations have been canceled */
32#define AIO_NOTCANCELED 1 /* some of the operations could not be canceled */
33                          /*   since they are in progress */
34#define AIO_ALLDONE     2 /* none of the requested operations could be */
35                          /*   canceled since they are already complete */
36
37/* lio_listio() options */
38
39#define LIO_WAIT        0 /* calling process is to suspend until the */
40                          /*   operation is complete */
41#define LIO_NOWAIT      1 /* calling process is to continue execution while */
42                          /*   the operation is performed and no notification */
43                          /*   shall be given when the operation is completed */
44#define LIO_READ        2 /* request a read() */
45#define LIO_WRITE       3 /* request a write() */
46#define LIO_NOP         4 /* no transfer is requested */
47
48/*
49 *  6.7.1.1 Asynchronous I/O Control Block, P1003.1b-1993, p. 151
50 */
51
52struct aiocb {
53  int             aio_fildes;     /* File descriptor */
54  off_t           aio_offset;     /* File offset */
55  volatile void  *aio_buf;        /* Location of buffer */
56  size_t          aio_nbytes;     /* Length of transfer */
57  int             aio_reqprio;    /* Request priority offset */
58  struct sigevent aio_sigevent;   /* Signal number and value */
59  int             aoi_lio_opcode; /* Operation to be performed */
60};
61
62/*
63 *  6.7.2 Asynchronous Read, P1003.1b-1993, p. 154
64 */
65
66int aio_read(
67  struct aiocb  *aiocbp
68);
69
70/*
71 *  6.7.3 Asynchronous Write, P1003.1b-1993, p. 155
72 */
73
74int aio_write(
75  struct aiocb  *aiocbp
76);
77
78/*
79 *  6.7.4 List Directed I/O, P1003.1b-1993, p. 158
80 */
81
82int lio_listio(
83  int                    mode,
84  struct aiocb  * const  list[],
85  int                    nent,
86  struct sigevent       *sig
87);
88
89/*
90 *  6.7.5 Retrieve Error of Asynchronous I/O Operation, P1003.1b-1993, p. 161
91 */
92
93int aio_error(
94  const struct aiocb  *aiocbp
95);
96
97/*
98 *  6.7.6 Retrieve Return Status of Asynchronous I/O Operation,
99 *        P1003.1b-1993, p. 162
100 */
101
102int aio_return(
103  const struct aiocb  *aiocbp
104);
105
106/*
107 *  6.7.7 Cancel Asynchronous I/O Operation, P1003.1b-1993, p. 163
108 */
109
110int aio_cancel(
111  int            filedes,
112  struct aiocb  *aiocbp
113);
114
115/*
116 *  6.7.7 Wait for Asynchronous I/O Request, P1003.1b-1993, p. 164
117 */
118
119int aio_suspend(
120  struct aiocb  * const   list[],
121  int                     nent,
122  const struct timespec  *timeout
123);
124
125#if defined(_POSIX_SYNCHRONIZED_IO)
126
127/*
128 *  6.7.9 Asynchronous File Synchronization, P1003.1b-1993, p. 166
129 */
130
131int aio_fsync(
132  int            op,
133  struct aiocb  *aiocbp
134);
135
136#endif /* _POSIX_SYNCHRONIZED_IO */
137
138#endif /* _POSIX_ASYNCHRONOUS_IO */
139
140#ifdef __cplusplus
141}
142#endif
143
144#endif
145/* end of include file */
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