mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
254 lines
7.6 KiB
C
254 lines
7.6 KiB
C
/* Copyright (C) 1996-2022 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
|
|
<https://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 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));
|
|
|
|
/* 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);
|
|
# ifdef __USE_TIME_BITS64
|
|
extern int __REDIRECT_NTH (aio_suspend,
|
|
(const struct aiocb *const __list[], int __nent,
|
|
const struct timespec *__restrict __timeout),
|
|
__aio_suspend_time64) __nonnull ((1));
|
|
# else
|
|
extern int __REDIRECT_NTH (aio_suspend,
|
|
(const struct aiocb *const __list[], int __nent,
|
|
const struct timespec *__restrict __timeout),
|
|
aio_suspend64) __nonnull ((1));
|
|
# endif
|
|
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
|
|
# ifdef __USE_TIME_BITS64
|
|
# define aio_suspend __aio_suspend_time64
|
|
# else
|
|
# define aio_suspend aio_suspend64
|
|
# endif
|
|
# 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 */
|