blob: 510e934fe5019509b3d8840cde6836d64ee49488 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/* Copyright (C) 2001-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
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);
#endif /* gai_misc.h */
|
