x11 factory: use vlc_readdir
[vlc/solaris.git] / include / vlc_gcrypt.h
blob89bdab87e1818b5ba6cd69a5e7c5948c9ac58517
1 /*****************************************************************************
2 * vlc_gcrypt.h: VLC thread support for gcrypt
3 *****************************************************************************
4 * Copyright (C) 2004-2010 RĂ©mi Denis-Courmont
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; either version 2.1 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19 *****************************************************************************/
21 /**
22 * \file
23 * This file implements gcrypt support functions in vlc
26 #include <errno.h>
28 #ifdef LIBVLC_USE_PTHREAD
29 /**
30 * If possible, use gcrypt-provided thread implementation. This is so that
31 * other non-VLC components (inside the process) can also use gcrypt safely.
33 GCRY_THREAD_OPTION_PTHREAD_IMPL;
34 # define gcry_threads_vlc gcry_threads_pthread
35 #else
37 /**
38 * gcrypt thread option VLC implementation
41 static int gcry_vlc_mutex_init( void **p_sys )
43 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
44 if( p_lock == NULL)
45 return ENOMEM;
47 vlc_mutex_init( p_lock );
48 *p_sys = p_lock;
49 return VLC_SUCCESS;
52 static int gcry_vlc_mutex_destroy( void **p_sys )
54 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
55 vlc_mutex_destroy( p_lock );
56 free( p_lock );
57 return VLC_SUCCESS;
60 static int gcry_vlc_mutex_lock( void **p_sys )
62 vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
63 return VLC_SUCCESS;
66 static int gcry_vlc_mutex_unlock( void **lock )
68 vlc_mutex_unlock( (vlc_mutex_t *)*lock );
69 return VLC_SUCCESS;
72 static const struct gcry_thread_cbs gcry_threads_vlc =
74 GCRY_THREAD_OPTION_USER,
75 NULL,
76 gcry_vlc_mutex_init,
77 gcry_vlc_mutex_destroy,
78 gcry_vlc_mutex_lock,
79 gcry_vlc_mutex_unlock,
80 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
82 #endif
84 /**
85 * Initializes gcrypt with proper locking.
87 static inline void vlc_gcrypt_init (void)
89 /* This would need a process-wide static mutex with all libraries linking
90 * to a given instance of libgcrypt. We cannot do this as we have different
91 * plugins linking with gcrypt, and some underlying libraries may use it
92 * behind our back. Only way is to always link gcrypt statically (ouch!) or
93 * have upstream gcrypt provide one shared object per threading system. */
94 static bool done = false;
96 vlc_global_lock (VLC_GCRYPT_MUTEX);
97 if (!done)
99 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
100 done = true;
102 vlc_global_unlock (VLC_GCRYPT_MUTEX);