| /* Copyright (C) 1996-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* |
| * ISO/IEC 9945-1:1996 6.7: Asynchronous Input and Output |
| */ |
| |
| #ifndef _AIO_H |
| #define _AIO_H 1 |
| |
| #include <features.h> |
| #include <sys/types.h> |
| #define __need_sigevent_t |
| #include <bits/siginfo.h> |
| #define __need_timespec |
| #include <time.h> |
| |
| __BEGIN_DECLS |
| |
| /* Asynchronous I/O control block. */ |
| struct aiocb |
| { |
| int aio_fildes; /* File desriptor. */ |
| int aio_lio_opcode; /* Operation to be performed. */ |
| int aio_reqprio; /* Request priority offset. */ |
| volatile void *aio_buf; /* Location of buffer. */ |
| size_t aio_nbytes; /* Length of transfer. */ |
| struct sigevent aio_sigevent; /* Signal number and value. */ |
| |
| /* Internal members. */ |
| struct aiocb *__next_prio; |
| int __abs_prio; |
| int __policy; |
| int __error_code; |
| __ssize_t __return_value; |
| |
| #ifndef __USE_FILE_OFFSET64 |
| __off_t aio_offset; /* File offset. */ |
| char __pad[sizeof (__off64_t) - sizeof (__off_t)]; |
| #else |
| __off64_t aio_offset; /* File offset. */ |
| #endif |
| char __glibc_reserved[32]; |
| }; |
| |
| /* The same for the 64bit offsets. Please note that the members aio_fildes |
| to __return_value have to be the same in aiocb and aiocb64. */ |
| #ifdef __USE_LARGEFILE64 |
| struct aiocb64 |
| { |
| int aio_fildes; /* File desriptor. */ |
| int aio_lio_opcode; /* Operation to be performed. */ |
| int aio_reqprio; /* Request priority offset. */ |
| volatile void *aio_buf; /* Location of buffer. */ |
| size_t aio_nbytes; /* Length of transfer. */ |
| struct sigevent aio_sigevent; /* Signal number and value. */ |
| |
| /* Internal members. */ |
| struct aiocb *__next_prio; |
| int __abs_prio; |
| int __policy; |
| int __error_code; |
| __ssize_t __return_value; |
| |
| __off64_t aio_offset; /* File offset. */ |
| char __glibc_reserved[32]; |
| }; |
| #endif |
| |
| |
| #ifdef __USE_GNU |
| /* To customize the implementation one can use the following struct. |
| This implementation follows the one in Irix. */ |
| struct aioinit |
| { |
| int aio_threads; /* Maximal number of threads. */ |
| int aio_num; /* Number of expected simultanious requests. */ |
| int aio_locks; /* Not used. */ |
| int aio_usedba; /* Not used. */ |
| int aio_debug; /* Not used. */ |
| int aio_numusers; /* Not used. */ |
| int aio_idle_time; /* Number of seconds before idle thread |
| terminates. */ |
| int aio_reserved; |
| }; |
| #endif |
| |
| |
| /* Return values of cancelation function. */ |
| enum |
| { |
| AIO_CANCELED, |
| #define AIO_CANCELED AIO_CANCELED |
| AIO_NOTCANCELED, |
| #define AIO_NOTCANCELED AIO_NOTCANCELED |
| AIO_ALLDONE |
| #define AIO_ALLDONE AIO_ALLDONE |
| }; |
| |
| |
| /* Operation codes for `aio_lio_opcode'. */ |
| enum |
| { |
| LIO_READ, |
| #define LIO_READ LIO_READ |
| LIO_WRITE, |
| #define LIO_WRITE LIO_WRITE |
| LIO_NOP |
| #define LIO_NOP LIO_NOP |
| }; |
| |
| |
| /* Synchronization options for `lio_listio' function. */ |
| enum |
| { |
| LIO_WAIT, |
| #define LIO_WAIT LIO_WAIT |
| LIO_NOWAIT |
| #define LIO_NOWAIT LIO_NOWAIT |
| }; |
| |
| |
| /* Allow user to specify optimization. */ |
| #ifdef __USE_GNU |
| extern void aio_init (const struct aioinit *__init) __THROW __nonnull ((1)); |
| #endif |
| |
| |
| #ifndef __USE_FILE_OFFSET64 |
| /* Enqueue read request for given number of bytes and the given priority. */ |
| extern int aio_read (struct aiocb *__aiocbp) __THROW __nonnull ((1)); |
| /* Enqueue write request for given number of bytes and the given priority. */ |
| extern int aio_write (struct aiocb *__aiocbp) __THROW __nonnull ((1)); |
| |
| /* Initiate list of I/O requests. */ |
| extern int lio_listio (int __mode, |
| struct aiocb *const __list[__restrict_arr], |
| int __nent, struct sigevent *__restrict __sig) |
| __THROW __nonnull ((2)); |
| |
| /* Retrieve error status associated with AIOCBP. */ |
| extern int aio_error (const struct aiocb *__aiocbp) __THROW __nonnull ((1)); |
| /* Return status associated with AIOCBP. */ |
| extern __ssize_t aio_return (struct aiocb *__aiocbp) __THROW __nonnull ((1)); |
| |
| /* Try to cancel asynchronous I/O requests outstanding against file |
| descriptor FILDES. */ |
| extern int aio_cancel (int __fildes, struct aiocb *__aiocbp) __THROW; |
| |
| /* Suspend calling thread until at least one of the asynchronous I/O |
| operations referenced by LIST has completed. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int aio_suspend (const struct aiocb *const __list[], int __nent, |
| const struct timespec *__restrict __timeout) |
| __nonnull ((1)); |
| |
| /* Force all operations associated with file desriptor described by |
| `aio_fildes' member of AIOCBP. */ |
| extern int aio_fsync (int __operation, struct aiocb *__aiocbp) |
| __THROW __nonnull ((2)); |
| #else |
| # ifdef __REDIRECT_NTH |
| extern int __REDIRECT_NTH (aio_read, (struct aiocb *__aiocbp), aio_read64) |
| __nonnull ((1)); |
| extern int __REDIRECT_NTH (aio_write, (struct aiocb *__aiocbp), aio_write64) |
| __nonnull ((1)); |
| |
| extern int __REDIRECT_NTH (lio_listio, |
| (int __mode, |
| struct aiocb *const __list[__restrict_arr], |
| int __nent, struct sigevent *__restrict __sig), |
| lio_listio64) __nonnull ((2)); |
| |
| extern int __REDIRECT_NTH (aio_error, (const struct aiocb *__aiocbp), |
| aio_error64) __nonnull ((1)); |
| extern __ssize_t __REDIRECT_NTH (aio_return, (struct aiocb *__aiocbp), |
| aio_return64) __nonnull ((1)); |
| |
| extern int __REDIRECT_NTH (aio_cancel, |
| (int __fildes, struct aiocb *__aiocbp), |
| aio_cancel64); |
| |
| extern int __REDIRECT_NTH (aio_suspend, |
| (const struct aiocb *const __list[], int __nent, |
| const struct timespec *__restrict __timeout), |
| aio_suspend64) __nonnull ((1)); |
| |
| extern int __REDIRECT_NTH (aio_fsync, |
| (int __operation, struct aiocb *__aiocbp), |
| aio_fsync64) __nonnull ((2)); |
| |
| # else |
| # define aio_read aio_read64 |
| # define aio_write aio_write64 |
| # define lio_listio lio_listio64 |
| # define aio_error aio_error64 |
| # define aio_return aio_return64 |
| # define aio_cancel aio_cancel64 |
| # define aio_suspend aio_suspend64 |
| # define aio_fsync aio_fsync64 |
| # endif |
| #endif |
| |
| #ifdef __USE_LARGEFILE64 |
| extern int aio_read64 (struct aiocb64 *__aiocbp) __THROW __nonnull ((1)); |
| extern int aio_write64 (struct aiocb64 *__aiocbp) __THROW __nonnull ((1)); |
| |
| extern int lio_listio64 (int __mode, |
| struct aiocb64 *const __list[__restrict_arr], |
| int __nent, struct sigevent *__restrict __sig) |
| __THROW __nonnull ((2)); |
| |
| extern int aio_error64 (const struct aiocb64 *__aiocbp) |
| __THROW __nonnull ((1)); |
| extern __ssize_t aio_return64 (struct aiocb64 *__aiocbp) |
| __THROW __nonnull ((1)); |
| |
| extern int aio_cancel64 (int __fildes, struct aiocb64 *__aiocbp) __THROW; |
| |
| extern int aio_suspend64 (const struct aiocb64 *const __list[], int __nent, |
| const struct timespec *__restrict __timeout) |
| __THROW __nonnull ((1)); |
| |
| extern int aio_fsync64 (int __operation, struct aiocb64 *__aiocbp) |
| __THROW __nonnull ((2)); |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* aio.h */ |