diff options
Diffstat (limited to 'resolv/gai_suspend.c')
| -rw-r--r-- | resolv/gai_suspend.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/resolv/gai_suspend.c b/resolv/gai_suspend.c deleted file mode 100644 index a86bd4360d..0000000000 --- a/resolv/gai_suspend.c +++ /dev/null @@ -1,157 +0,0 @@ -/* Copyright (C) 2001-2017 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 - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <netdb.h> -#include <pthread.h> -#include <stdlib.h> -#include <sys/time.h> - -#include <gai_misc.h> - - -int -gai_suspend (const struct gaicb *const list[], int ent, - const struct timespec *timeout) -{ - struct waitlist waitlist[ent]; - struct requestlist *requestlist[ent]; -#ifndef DONT_NEED_GAI_MISC_COND - pthread_cond_t cond = PTHREAD_COND_INITIALIZER; -#endif - int cnt; - unsigned int cntr = 1; - int none = 1; - int result; - - /* Request the mutex. */ - pthread_mutex_lock (&__gai_requests_mutex); - - /* There is not yet a finished request. Signal the request that - we are working for it. */ - for (cnt = 0; cnt < ent; ++cnt) - if (list[cnt] != NULL && list[cnt]->__return == EAI_INPROGRESS) - { - requestlist[cnt] = __gai_find_request (list[cnt]); - - if (requestlist[cnt] != NULL) - { -#ifndef DONT_NEED_GAI_MISC_COND - waitlist[cnt].cond = &cond; -#endif - waitlist[cnt].next = requestlist[cnt]->waiting; - waitlist[cnt].counterp = &cntr; - waitlist[cnt].sigevp = NULL; - waitlist[cnt].caller_pid = 0; /* Not needed. */ - requestlist[cnt]->waiting = &waitlist[cnt]; - none = 0; - } - } - - if (none) - { - if (cnt < ent) - /* There is an entry which is finished. */ - result = 0; - else - result = EAI_ALLDONE; - } - else - { - /* There is no request done but some are still being worked on. */ - int oldstate; - - /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancelation - points we must be careful. We added entries to the waiting lists - which we must remove. So defer cancelation for now. */ - pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate); - -#ifdef DONT_NEED_GAI_MISC_COND - result = 0; - GAI_MISC_WAIT (result, cntr, timeout, 1); -#else - if (timeout == NULL) - result = pthread_cond_wait (&cond, &__gai_requests_mutex); - else - { - /* We have to convert the relative timeout value into an - absolute time value with pthread_cond_timedwait expects. */ - struct timeval now; - struct timespec abstime; - - __gettimeofday (&now, NULL); - abstime.tv_nsec = timeout->tv_nsec + now.tv_usec * 1000; - abstime.tv_sec = timeout->tv_sec + now.tv_sec; - if (abstime.tv_nsec >= 1000000000) - { - abstime.tv_nsec -= 1000000000; - abstime.tv_sec += 1; - } - - result = pthread_cond_timedwait (&cond, &__gai_requests_mutex, - &abstime); - } -#endif - - /* Now remove the entry in the waiting list for all requests - which didn't terminate. */ - for (cnt = 0; cnt < ent; ++cnt) - if (list[cnt] != NULL && list[cnt]->__return == EAI_INPROGRESS - && requestlist[cnt] != NULL) - { - struct waitlist **listp = &requestlist[cnt]->waiting; - - /* There is the chance that we cannot find our entry anymore. - This could happen if the request terminated and restarted - again. */ - while (*listp != NULL && *listp != &waitlist[cnt]) - listp = &(*listp)->next; - - if (*listp != NULL) - *listp = (*listp)->next; - } - - /* Now it's time to restore the cancelation state. */ - pthread_setcancelstate (oldstate, NULL); - -#ifndef DONT_NEED_GAI_MISC_COND - /* Release the conditional variable. */ - if (pthread_cond_destroy (&cond) != 0) - /* This must never happen. */ - abort (); -#endif - - if (result != 0) - { - /* An error occurred. Possibly it's EINTR. We have to translate - the timeout error report of `pthread_cond_timedwait' to the - form expected from `gai_suspend'. */ - if (__glibc_likely (result == ETIMEDOUT)) - result = EAI_AGAIN; - else if (result == EINTR) - result = EAI_INTR; - else - result = EAI_SYSTEM; - } - } - - /* Release the mutex. */ - pthread_mutex_unlock (&__gai_requests_mutex); - - return result; -} |