mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-28 21:41:08 +00:00
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/* Copyright (C) 1997-2015 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/>. */
|
|
|
|
#ifndef _AIO_MISC_H
|
|
#define _AIO_MISC_H 1
|
|
|
|
#include <aio.h>
|
|
#include <pthread.h>
|
|
|
|
|
|
/* Extend the operation enum. */
|
|
enum
|
|
{
|
|
LIO_DSYNC = LIO_NOP + 1,
|
|
LIO_SYNC,
|
|
LIO_READ64 = LIO_READ | 128,
|
|
LIO_WRITE64 = LIO_WRITE | 128
|
|
};
|
|
|
|
|
|
/* Union of the two request types. */
|
|
typedef union
|
|
{
|
|
struct aiocb aiocb;
|
|
struct aiocb64 aiocb64;
|
|
} aiocb_union;
|
|
|
|
|
|
/* Used to synchronize. */
|
|
struct waitlist
|
|
{
|
|
struct waitlist *next;
|
|
|
|
/* The next two fields is used in synchronous `lio_listio' operations. */
|
|
#ifndef DONT_NEED_AIO_MISC_COND
|
|
pthread_cond_t *cond;
|
|
#endif
|
|
int *result;
|
|
|
|
volatile unsigned int *counterp;
|
|
/* The next field is used in asynchronous `lio_listio' operations. */
|
|
struct sigevent *sigevp;
|
|
#ifdef BROKEN_THREAD_SIGNALS
|
|
/* XXX See requestlist, it's used to work around the broken signal
|
|
handling in Linux. */
|
|
pid_t caller_pid;
|
|
#endif
|
|
};
|
|
|
|
|
|
/* Status of a request. */
|
|
enum
|
|
{
|
|
no,
|
|
queued,
|
|
yes,
|
|
allocated,
|
|
done
|
|
};
|
|
|
|
|
|
/* Used to queue requests.. */
|
|
struct requestlist
|
|
{
|
|
int running;
|
|
|
|
struct requestlist *last_fd;
|
|
struct requestlist *next_fd;
|
|
struct requestlist *next_prio;
|
|
struct requestlist *next_run;
|
|
|
|
/* Pointer to the actual data. */
|
|
aiocb_union *aiocbp;
|
|
|
|
#ifdef BROKEN_THREAD_SIGNALS
|
|
/* PID of the initiator thread.
|
|
XXX This is only necessary for the broken signal handling on Linux. */
|
|
pid_t caller_pid;
|
|
#endif
|
|
|
|
/* List of waiting processes. */
|
|
struct waitlist *waiting;
|
|
};
|
|
|
|
|
|
/* Lock for global I/O list of requests. */
|
|
extern pthread_mutex_t __aio_requests_mutex attribute_hidden;
|
|
|
|
|
|
/* Enqueue request. */
|
|
extern struct requestlist *__aio_enqueue_request (aiocb_union *aiocbp,
|
|
int operation)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Find request entry for given AIO control block. */
|
|
extern struct requestlist *__aio_find_req (aiocb_union *elem)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Find request entry for given file descriptor. */
|
|
extern struct requestlist *__aio_find_req_fd (int fildes)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Remove request from the list. */
|
|
extern void __aio_remove_request (struct requestlist *last,
|
|
struct requestlist *req, int all)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Release the entry for the request. */
|
|
extern void __aio_free_request (struct requestlist *req)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Notify initiator of request and tell this everybody listening. */
|
|
extern void __aio_notify (struct requestlist *req)
|
|
attribute_hidden internal_function;
|
|
|
|
/* Notify initiator of request. */
|
|
#ifdef BROKEN_THREAD_SIGNALS
|
|
extern int __aio_notify_only (struct sigevent *sigev, pid_t caller_pid)
|
|
attribute_hidden internal_function;
|
|
#else
|
|
extern int __aio_notify_only (struct sigevent *sigev)
|
|
attribute_hidden internal_function;
|
|
#endif
|
|
|
|
/* Send the signal. */
|
|
extern int __aio_sigqueue (int sig, const union sigval val, pid_t caller_pid)
|
|
attribute_hidden internal_function;
|
|
|
|
#endif /* aio_misc.h */
|