1 *lz*Clq@Cqţ u^_I|+:/* Copyright (C) 1996-2021 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 . */ /* * ISO/IEC 9945-1:1996 6.7: Asynchronous Input and Output */ #ifndef _AIO_H #define _AIO_H 1 #include #include #include #include #include __BEGIN_DECLS /* Asynchronous I/O control block. */ struct aiocb { int aio_fildes; /* File descriptor. */ 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 descriptor. */ 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 optimize the implementation one can use the following struct. */ struct aioinit { int aio_threads; /* Maximum number of threads. */ int aio_num; /* Number of expected simultaneous 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 the aio_cancel 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)); /*