[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/resolv/gai_suspend.c b/ap/libc/glibc/glibc-2.22/resolv/gai_suspend.c
new file mode 100644
index 0000000..c3a1288
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/resolv/gai_suspend.c
@@ -0,0 +1,157 @@
+/* Copyright (C) 2001-2015 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 (__builtin_expect (result, ETIMEDOUT) == 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;
+}