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102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/* Copyright (C) 2001-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _GAI_MISC_H
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#define _GAI_MISC_H 1
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#include <netdb.h>
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#include <signal.h>
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/* Used to synchronize. */
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struct waitlist
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{
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struct waitlist *next;
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#ifndef DONT_NEED_GAI_MISC_COND
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pthread_cond_t *cond;
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#endif
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volatile unsigned int *counterp;
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/* The next field is used in asynchronous `lio_listio' operations. */
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struct sigevent *sigevp;
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/* XXX See requestlist, it's used to work around the broken signal
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handling in Linux. */
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pid_t caller_pid;
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};
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/* Used to queue requests.. */
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struct requestlist
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{
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int running;
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struct requestlist *next;
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/* Pointer to the actual data. */
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struct gaicb *gaicbp;
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/* List of waiting processes. */
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struct waitlist *waiting;
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};
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/* To customize the implementation one can use the following struct.
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This implementation follows the one in Irix. */
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struct gaiinit
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{
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int gai_threads; /* Maximal number of threads. */
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int gai_num; /* Number of expected simultanious requests. */
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int gai_locks; /* Not used. */
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int gai_usedba; /* Not used. */
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int gai_debug; /* Not used. */
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int gai_numusers; /* Not used. */
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int gai_idle_time; /* Number of seconds before idle thread
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terminates. */
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int gai_reserved;
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};
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/* Lock for global I/O list of requests. */
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extern pthread_mutex_t __gai_requests_mutex;
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/* Enqueue request. */
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extern struct requestlist *__gai_enqueue_request (struct gaicb *gaicbp)
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internal_function;
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/* Find request on wait list. */
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extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp)
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internal_function;
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/* Remove request from waitlist. */
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extern int __gai_remove_request (struct gaicb *gaicbp)
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internal_function;
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/* Notify initiator of request and tell this everybody listening. */
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extern void __gai_notify (struct requestlist *req)
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internal_function;
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/* Notify initiator of request. */
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extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid)
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internal_function;
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/* Send the signal. */
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extern int __gai_sigqueue (int sig, const union sigval val, pid_t caller_pid)
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internal_function;
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#endif /* gai_misc.h */
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