lib/locks.c

   1 /*
   2  * Copyright (C) 2010-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * The GnuTLS is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #include <gnutls_int.h>
  24 #include <gnutls_errors.h>
  25 #include <libtasn1.h>
  26 #include <gnutls_dh.h>
  27 #include <random.h>
  28
  29 #include <locks.h>
  30
  31
  32 /**
  33  * gnutls_global_set_mutex:
  34  * @init: mutex initialization function
  35  * @deinit: mutex deinitialization function
  36  * @lock: mutex locking function
  37  * @unlock: mutex unlocking function
  38  *
  39  * With this function you are allowed to override the default mutex
  40  * locks used in some parts of gnutls and dependent libraries. This function
  41  * should be used if you have complete control of your program and libraries.
  42  * Do not call this function from a library. Instead only initialize gnutls and
  43  * the default OS mutex locks will be used.
  44  *
  45  * This function must be called before gnutls_global_init().
  46  *
  47  * Since: 2.12.0
  48  **/
  49 void
  50 gnutls_global_set_mutex (mutex_init_func init, mutex_deinit_func deinit,
  51                          mutex_lock_func lock, mutex_unlock_func unlock)
  52 {
  53   if (init == NULL || deinit == NULL || lock == NULL || unlock == NULL)
  54     return;
  55
  56   gnutls_mutex_init = init;
  57   gnutls_mutex_deinit = deinit;
  58   gnutls_mutex_lock = lock;
  59   gnutls_mutex_unlock = unlock;
  60 }