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Diffstat (limited to 'resolv/gai_misc.h')
| -rw-r--r-- | resolv/gai_misc.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/resolv/gai_misc.h b/resolv/gai_misc.h new file mode 100644 index 0000000000..a37264e80b --- /dev/null +++ b/resolv/gai_misc.h @@ -0,0 +1,100 @@ +/* Copyright (C) 2001 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _GAI_MISC_H +#define _GAI_MISC_H 1 + +#include <netdb.h> +#include <signal.h> + + +/* Used to synchronize. */ +struct waitlist + { + struct waitlist *next; + + pthread_cond_t *cond; + volatile 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) + internal_function; + +/* Find request on wait list. */ +extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp) + internal_function; + +/* Remove request from waitlist. */ +extern int __gai_remove_request (struct gaicb *gaicbp) + internal_function; + +/* Notify initiator of request and tell this everybody listening. */ +extern void __gai_notify (struct requestlist *req) + internal_function; + +/* Notify initiator of request. */ +extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid) + internal_function; + +/* Send the signal. */ +extern int __gai_sigqueue (int sig, const union sigval val, pid_t caller_pid) + internal_function; + +#endif /* gai_misc.h */ |