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Diffstat (limited to 'REORG.TODO/rt/aio.h')
| -rw-r--r-- | REORG.TODO/rt/aio.h | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/REORG.TODO/rt/aio.h b/REORG.TODO/rt/aio.h new file mode 100644 index 0000000000..d72ad5d97d --- /dev/null +++ b/REORG.TODO/rt/aio.h @@ -0,0 +1,245 @@ +/* Copyright (C) 1996-2017 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> +#include <bits/types/sigevent_t.h> +#include <bits/sigevent-consts.h> +#include <bits/types/struct_timespec.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 */ |