1 /* Copyright (C) 1996,1997,1998,1999,2000,2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 * ISO/IEC 9945-1:1996 6.7: Asynchronous Input and Output
30 #include <sys/types.h>
34 /* Asynchronous I/O control block. */
37 int aio_fildes; /* File desriptor. */
38 int aio_lio_opcode; /* Operation to be performed. */
39 int aio_reqprio; /* Request priority offset. */
40 volatile void *aio_buf; /* Location of buffer. */
41 size_t aio_nbytes; /* Length of transfer. */
42 struct sigevent aio_sigevent; /* Signal number and value. */
44 /* Internal members. */
45 struct aiocb *__next_prio;
49 __ssize_t __return_value;
51 #ifndef __USE_FILE_OFFSET64
52 __off_t aio_offset; /* File offset. */
53 char __pad[sizeof (__off64_t) - sizeof (__off_t)];
55 __off64_t aio_offset; /* File offset. */
60 /* The same for the 64bit offsets. Please note that the members aio_fildes
61 to __return_value have to be the same in aiocb and aiocb64. */
62 #ifdef __USE_LARGEFILE64
65 int aio_fildes; /* File desriptor. */
66 int aio_lio_opcode; /* Operation to be performed. */
67 int aio_reqprio; /* Request priority offset. */
68 volatile void *aio_buf; /* Location of buffer. */
69 size_t aio_nbytes; /* Length of transfer. */
70 struct sigevent aio_sigevent; /* Signal number and value. */
72 /* Internal members. */
73 struct aiocb *__next_prio;
77 __ssize_t __return_value;
79 __off64_t aio_offset; /* File offset. */
86 /* To customize the implementation one can use the following struct.
87 This implementation follows the one in Irix. */
90 int aio_threads; /* Maximal number of threads. */
91 int aio_num; /* Number of expected simultanious requests. */
92 int aio_locks; /* Not used. */
93 int aio_usedba; /* Not used. */
94 int aio_debug; /* Not used. */
95 int aio_numusers; /* Not used. */
96 int aio_idle_time; /* Number of seconds before idle thread
103 /* Return values of cancelation function. */
107 #define AIO_CANCELED AIO_CANCELED
109 #define AIO_NOTCANCELED AIO_NOTCANCELED
111 #define AIO_ALLDONE AIO_ALLDONE
115 /* Operation codes for `aio_lio_opcode'. */
119 #define LIO_READ LIO_READ
121 #define LIO_WRITE LIO_WRITE
123 #define LIO_NOP LIO_NOP
127 /* Synchronization options for `lio_listio' function. */
131 #define LIO_WAIT LIO_WAIT
133 #define LIO_NOWAIT LIO_NOWAIT
137 /* Allow user to specify optimization. */
139 extern void aio_init (__const struct aioinit *__init) __THROW;
143 #ifndef __USE_FILE_OFFSET64
144 /* Enqueue read request for given number of bytes and the given priority. */
145 extern int aio_read (struct aiocb *__aiocbp) __THROW;
146 /* Enqueue write request for given number of bytes and the given priority. */
147 extern int aio_write (struct aiocb *__aiocbp) __THROW;
149 /* Initiate list of I/O requests. */
150 extern int lio_listio (int __mode,
151 struct aiocb *__const __list[__restrict_arr],
152 int __nent, struct sigevent *__restrict __sig) __THROW;
154 /* Retrieve error status associated with AIOCBP. */
155 extern int aio_error (__const struct aiocb *__aiocbp) __THROW;
156 /* Return status associated with AIOCBP. */
157 extern __ssize_t aio_return (struct aiocb *__aiocbp) __THROW;
159 /* Try to cancel asynchronous I/O requests outstanding against file
160 descriptor FILDES. */
161 extern int aio_cancel (int __fildes, struct aiocb *__aiocbp) __THROW;
163 /* Suspend calling thread until at least one of the asynchronous I/O
164 operations referenced by LIST has completed.
166 This function is a cancellation point and therefore not marked with
168 extern int aio_suspend (__const struct aiocb *__const __list[], int __nent,
169 __const struct timespec *__restrict __timeout);
171 /* Force all operations associated with file desriptor described by
172 `aio_fildes' member of AIOCBP. */
173 extern int aio_fsync (int __operation, struct aiocb *__aiocbp) __THROW;
176 extern int __REDIRECT (aio_read, (struct aiocb *__aiocbp) __THROW, aio_read64);
177 extern int __REDIRECT (aio_write, (struct aiocb *__aiocbp) __THROW,
180 extern int __REDIRECT (lio_listio,
182 struct aiocb *__const __list[__restrict_arr],
183 int __nent, struct sigevent *__restrict __sig) __THROW,
186 extern int __REDIRECT (aio_error, (__const struct aiocb *__aiocbp) __THROW,
188 extern __ssize_t __REDIRECT (aio_return, (struct aiocb *__aiocbp) __THROW,
191 extern int __REDIRECT (aio_cancel,
192 (int __fildes, struct aiocb *__aiocbp) __THROW,
195 extern int __REDIRECT (aio_suspend,
196 (__const struct aiocb *__const __list[],
198 __const struct timespec *__restrict __timeout) __THROW,
201 extern int __REDIRECT (aio_fsync,
202 (int __operation, struct aiocb *__aiocbp) __THROW,
206 # define aio_read aio_read64
207 # define aio_write aio_write64
208 # define lio_listio lio_listio64
209 # define aio_error aio_error64
210 # define aio_return aio_return64
211 # define aio_cancel aio_cancel64
212 # define aio_suspend aio_suspend64
213 # define aio_fsync aio_fsync64
217 #ifdef __USE_LARGEFILE64
218 extern int aio_read64 (struct aiocb64 *__aiocbp) __THROW;
219 extern int aio_write64 (struct aiocb64 *__aiocbp) __THROW;
221 extern int lio_listio64 (int __mode,
222 struct aiocb64 *__const __list[__restrict_arr],
223 int __nent, struct sigevent *__restrict __sig)
226 extern int aio_error64 (__const struct aiocb64 *__aiocbp) __THROW;
227 extern __ssize_t aio_return64 (struct aiocb64 *__aiocbp) __THROW;
229 extern int aio_cancel64 (int __fildes, struct aiocb64 *__aiocbp) __THROW;
231 extern int aio_suspend64 (__const struct aiocb64 *__const __list[], int __nent,
232 __const struct timespec *__restrict __timeout)
235 extern int aio_fsync64 (int __operation, struct aiocb64 *__aiocbp) __THROW;