1 /*****************************************************************************
2 * log.c: libvlc new API log functions
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
8 * Authors: Damien Fouilleul <damienf@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
29 #include "libvlc_internal.h"
30 #include <vlc/libvlc.h>
33 /* This API is terminally broken.
34 * First, it does not implement any kind of notification.
35 * Second, the iterating scheme is hermetic to any kind of thread-safety
36 * owing to its constant pointer constraints.
39 * "If you break your leg, don't run to me for sympathy"
40 * -- some character, Beneath a Steel Sky
46 msg_item_t *items[VLC_MSG_QSIZE];
51 static void handler( msg_cb_data_t *d, const msg_item_t *p_item )
53 if (p_item->i_type > d->verbosity)
56 msg_item_t *msg = msg_Copy (p_item);
58 vlc_spin_lock (&d->lock);
59 if (d->count < VLC_MSG_QSIZE)
60 d->items[d->count++] = msg;
61 vlc_spin_unlock (&d->lock);
66 libvlc_instance_t *p_instance;
67 msg_subscription_t *p_messages;
71 struct libvlc_log_iterator_t
73 msg_cb_data_t *p_data;
78 unsigned libvlc_get_log_verbosity( const libvlc_instance_t *p_instance )
81 return p_instance->verbosity;
84 void libvlc_set_log_verbosity( libvlc_instance_t *p_instance, unsigned level )
87 p_instance->verbosity = level;
90 libvlc_log_t *libvlc_log_open( libvlc_instance_t *p_instance )
92 struct libvlc_log_t *p_log = malloc(sizeof(*p_log));
93 if (unlikely(p_log == NULL))
95 libvlc_printerr ("Not enough memory");
99 p_log->p_instance = p_instance;
100 vlc_spin_init( &p_log->data.lock );
101 p_log->data.count = 0;
102 p_log->data.verbosity = p_instance->verbosity;
103 p_log->p_messages = msg_Subscribe(p_instance->p_libvlc_int, handler, &p_log->data);
105 if( !p_log->p_messages )
108 libvlc_printerr ("Not enough memory");
112 libvlc_retain( p_instance );
116 void libvlc_log_close( libvlc_log_t *p_log )
121 assert( p_log->p_messages );
122 msg_Unsubscribe(p_log->p_messages);
123 libvlc_release( p_log->p_instance );
124 libvlc_log_clear( p_log );
125 vlc_spin_destroy( &p_log->data.lock );
129 unsigned libvlc_log_count( const libvlc_log_t *p_log )
134 msg_cb_data_t *data = &((libvlc_log_t *)p_log)->data;
137 /* We cannot lock due to constant pointer constraints. Break them.
138 * Even then, this si not really thread safe anyway. */
139 vlc_spin_lock (&data->lock);
141 vlc_spin_unlock (&data->lock);
145 void libvlc_log_clear( libvlc_log_t *p_log )
150 vlc_spin_lock (&p_log->data.lock);
151 msg_item_t *tab[p_log->data.count];
152 memcpy (tab, p_log->data.items, sizeof (tab));
153 p_log->data.count = 0;
154 vlc_spin_unlock (&p_log->data.lock);
156 for (unsigned i = 0; i < sizeof (tab) / sizeof (tab[0]); i++)
160 libvlc_log_iterator_t *libvlc_log_get_iterator( const libvlc_log_t *p_log )
165 struct libvlc_log_iterator_t *p_iter = malloc (sizeof (*p_iter));
166 if (unlikely(p_iter == NULL))
168 libvlc_printerr ("Not enough memory");
172 /* FIXME: break constant pointer constraints */
173 msg_cb_data_t *data = &((libvlc_log_t *)p_log)->data;
175 vlc_spin_lock (&data->lock);
176 p_iter->p_data = data;
178 p_iter->i_end = data->count;
179 vlc_spin_unlock (&data->lock);
183 void libvlc_log_iterator_free( libvlc_log_iterator_t *p_iter )
188 int libvlc_log_iterator_has_next( const libvlc_log_iterator_t *p_iter )
192 return p_iter->i_pos != p_iter->i_end;
195 libvlc_log_message_t *libvlc_log_iterator_next( libvlc_log_iterator_t *p_iter,
196 libvlc_log_message_t *buffer )
202 assert (buffer != NULL);
204 i_pos = p_iter->i_pos;
205 if( i_pos != p_iter->i_end )
208 vlc_spin_lock (&p_iter->p_data->lock);
209 msg = p_iter->p_data->items[i_pos];
210 buffer->i_severity = msg->i_type;
211 buffer->psz_type = msg->psz_object_type;
212 buffer->psz_name = msg->psz_module;
213 buffer->psz_header = msg->psz_header;
214 buffer->psz_message = msg->psz_msg;
215 vlc_spin_unlock (&p_iter->p_data->lock);