101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Copyright (C) 2001-2022 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/>. */
|
|
|
|
#ifndef _GAI_MISC_H
|
|
#define _GAI_MISC_H 1
|
|
|
|
#include <netdb.h>
|
|
#include <signal.h>
|
|
|
|
|
|
/* Used to synchronize. */
|
|
struct waitlist
|
|
{
|
|
struct waitlist *next;
|
|
|
|
#ifndef DONT_NEED_GAI_MISC_COND
|
|
pthread_cond_t *cond;
|
|
#endif
|
|
volatile unsigned int *counterp;
|
|
/* The next field is used in asynchronous `lio_listio' operations. */
|
|
struct sigevent *sigevp;
|
|
/* XXX See requestlist, it's used to work around the broken signal
|
|
handling in Linux. */
|
|
pid_t caller_pid;
|
|
};
|
|
|
|
|
|
/* Used to queue requests.. */
|
|
struct requestlist
|
|
{
|
|
int running;
|
|
|
|
struct requestlist *next;
|
|
|
|
/* Pointer to the actual data. */
|
|
struct gaicb *gaicbp;
|
|
|
|
/* List of waiting processes. */
|
|
struct waitlist *waiting;
|
|
};
|
|
|
|
/* To customize the implementation one can use the following struct.
|
|
This implementation follows the one in Irix. */
|
|
struct gaiinit
|
|
{
|
|
int gai_threads; /* Maximal number of threads. */
|
|
int gai_num; /* Number of expected simultanious requests. */
|
|
int gai_locks; /* Not used. */
|
|
int gai_usedba; /* Not used. */
|
|
int gai_debug; /* Not used. */
|
|
int gai_numusers; /* Not used. */
|
|
int gai_idle_time; /* Number of seconds before idle thread
|
|
terminates. */
|
|
int gai_reserved;
|
|
};
|
|
|
|
|
|
/* Lock for global I/O list of requests. */
|
|
extern pthread_mutex_t __gai_requests_mutex;
|
|
|
|
|
|
/* Enqueue request. */
|
|
extern struct requestlist *__gai_enqueue_request (struct gaicb *gaicbp)
|
|
attribute_hidden;
|
|
|
|
/* Find request on wait list. */
|
|
extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp)
|
|
attribute_hidden;
|
|
|
|
/* Remove request from waitlist. */
|
|
extern int __gai_remove_request (struct gaicb *gaicbp)
|
|
attribute_hidden;
|
|
|
|
/* Notify initiator of request and tell this everybody listening. */
|
|
extern void __gai_notify (struct requestlist *req)
|
|
attribute_hidden;
|
|
|
|
/* Notify initiator of request. */
|
|
extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid)
|
|
attribute_hidden;
|
|
|
|
/* Send the signal. */
|
|
extern int __gai_sigqueue (int sig, const union sigval val, pid_t caller_pid);
|
|
libc_hidden_proto (__gai_sigqueue)
|
|
|
|
#endif /* gai_misc.h */
|