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 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 #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 vlc_mutex_t lock = VLC_STATIC_MUTEX;
34 static uintptr_t refs = 0;
36 static void free_msg (void *msg)
42 void libvlc_threads_init (void)
44 vlc_mutex_lock (&lock);
46 vlc_threadvar_create (&context, free_msg);
47 vlc_mutex_unlock (&lock);
50 void libvlc_threads_deinit (void)
52 vlc_mutex_lock (&lock);
55 vlc_threadvar_delete (&context);
56 vlc_mutex_unlock (&lock);
59 static char *get_error (void)
61 return vlc_threadvar_get (context);
64 static void free_error (void)
66 free_msg (get_error ());
70 * Gets a human-readable error message for the last LibVLC error in the calling
71 * thread. The resulting string is valid until another error occurs (at least
72 * until the next LibVLC call).
74 * @return NULL if there was no error, a nul-terminated string otherwise.
76 const char *libvlc_errmsg (void)
82 * Clears the LibVLC error status for the current thread. This is optional.
83 * By default, the error status is automatically overridden when a new error
84 * occurs, and destroyed when the thread exits.
86 void libvlc_clearerr (void)
89 vlc_threadvar_set (context, NULL);
93 * Sets the LibVLC error status and message for the current thread.
94 * Any previous error is overridden.
95 * @return a nul terminated string (always)
97 const char *libvlc_vprinterr (const char *fmt, va_list ap)
101 assert (fmt != NULL);
102 if (vasprintf (&msg, fmt, ap) == -1)
106 vlc_threadvar_set (context, msg);
111 * Sets the LibVLC error status and message for the current thread.
112 * Any previous error is overridden.
113 * @return a nul terminated string (always)
115 const char *libvlc_printerr (const char *fmt, ...)
121 msg = libvlc_vprinterr (fmt, ap);