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glibc  2.9
gai_cancel.c
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00001 /* Copyright (C) 2001, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <netdb.h>
00021 #include <pthread.h>
00022 
00023 #include <gai_misc.h>
00024 
00025 
00026 int
00027 gai_cancel (struct gaicb *gaicbp)
00028 {
00029   int result = 0;
00030   int status;
00031 
00032   /* Request the mutex.  */
00033   pthread_mutex_lock (&__gai_requests_mutex);
00034 
00035   /* Find the request among those queued but not yet running.  */
00036   status = __gai_remove_request (gaicbp);
00037   if (status == 0)
00038     result = EAI_CANCELED;
00039   else if (status > 0)
00040     result = EAI_NOTCANCELED;
00041   else
00042     result = EAI_ALLDONE;
00043 
00044   /* Release the mutex.  */
00045   pthread_mutex_unlock (&__gai_requests_mutex);
00046 
00047   return result;
00048 }