1 /*****************************************************************************
2 * error.c: Error handling for libvlc
3 *****************************************************************************
4 * Copyright (C) 2009 RĂ©mi Denis-Courmont
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 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 General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19 *****************************************************************************/
21 #include "libvlc_internal.h"
26 #include <vlc/libvlc.h>
29 static const char oom
[] = "Out of memory";
30 /* TODO: use only one thread-specific key for whole libvlc */
31 static vlc_threadvar_t context
;
33 static void libvlc_setup_threads (bool init
)
35 static vlc_mutex_t lock
= VLC_STATIC_MUTEX
;
36 static uintptr_t refs
= 0;
38 vlc_mutex_lock (&lock
);
42 vlc_threadvar_create (&context
, free
);
48 vlc_threadvar_delete (&context
);
50 vlc_mutex_unlock (&lock
);
53 void libvlc_init_threads (void)
55 libvlc_setup_threads (true);
58 void libvlc_deinit_threads (void)
60 libvlc_setup_threads (false);
63 static char *get_error (void)
65 return vlc_threadvar_get (context
);
68 static void free_error (void)
70 char *msg
= get_error ();
76 * Gets a human-readable error message for the last LibVLC error in the calling
77 * thread. The resulting string is valid until another error occurs (at least
78 * until the next LibVLC call).
80 * @return NULL if there was no error, a nul-terminated string otherwise.
82 const char *libvlc_errmsg (void)
88 * Clears the LibVLC error status for the current thread. This is optional.
89 * By default, the error status is automatically overridden when a new error
90 * occurs, and destroyed when the thread exits.
92 void libvlc_clearerr (void)
95 vlc_threadvar_set (context
, NULL
);
99 * Sets the LibVLC error status and message for the current thread.
100 * Any previous error is overridden.
101 * @return a nul terminated string (always)
103 const char *libvlc_vprinterr (const char *fmt
, va_list ap
)
107 assert (fmt
!= NULL
);
108 if (vasprintf (&msg
, fmt
, ap
) == -1)
112 vlc_threadvar_set (context
, msg
);
117 * Sets the LibVLC error status and message for the current thread.
118 * Any previous error is overridden.
119 * @return a nul terminated string (always)
121 const char *libvlc_printerr (const char *fmt
, ...)
127 msg
= libvlc_vprinterr (fmt
, ap
);