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
, msg_item_t
*p_item
, unsigned i_drop
)
53 if (p_item
->i_type
> d
->verbosity
)
56 vlc_spin_lock (&d
->lock
);
57 if (d
->count
< VLC_MSG_QSIZE
)
59 d
->items
[d
->count
++] = p_item
;
62 vlc_spin_unlock (&d
->lock
);
68 libvlc_instance_t
*p_instance
;
69 msg_subscription_t
*p_messages
;
73 struct libvlc_log_iterator_t
75 msg_cb_data_t
*p_data
;
80 unsigned libvlc_get_log_verbosity( const libvlc_instance_t
*p_instance
)
83 return p_instance
->verbosity
;
86 void libvlc_set_log_verbosity( libvlc_instance_t
*p_instance
, unsigned level
)
89 p_instance
->verbosity
= level
;
92 libvlc_log_t
*libvlc_log_open( libvlc_instance_t
*p_instance
)
94 struct libvlc_log_t
*p_log
= malloc(sizeof(*p_log
));
95 if (unlikely(p_log
== NULL
))
97 libvlc_printerr ("Not enough memory");
101 p_log
->p_instance
= p_instance
;
102 vlc_spin_init( &p_log
->data
.lock
);
103 p_log
->data
.count
= 0;
104 p_log
->data
.verbosity
= p_instance
->verbosity
;
105 p_log
->p_messages
= msg_Subscribe(p_instance
->p_libvlc_int
, handler
, &p_log
->data
);
107 if( !p_log
->p_messages
)
110 libvlc_printerr ("Not enough memory");
114 libvlc_retain( p_instance
);
118 void libvlc_log_close( libvlc_log_t
*p_log
)
123 assert( p_log
->p_messages
);
124 msg_Unsubscribe(p_log
->p_messages
);
125 libvlc_release( p_log
->p_instance
);
126 libvlc_log_clear( p_log
);
127 vlc_spin_destroy( &p_log
->data
.lock
);
131 unsigned libvlc_log_count( const libvlc_log_t
*p_log
)
136 msg_cb_data_t
*data
= &((libvlc_log_t
*)p_log
)->data
;
139 /* We cannot lock due to constant pointer constraints. Break them.
140 * Even then, this si not really thread safe anyway. */
141 vlc_spin_lock (&data
->lock
);
143 vlc_spin_unlock (&data
->lock
);
147 void libvlc_log_clear( libvlc_log_t
*p_log
)
152 vlc_spin_lock (&p_log
->data
.lock
);
153 msg_item_t
*tab
[p_log
->data
.count
];
154 memcpy (tab
, p_log
->data
.items
, sizeof (tab
));
155 p_log
->data
.count
= 0;
156 vlc_spin_unlock (&p_log
->data
.lock
);
158 for (unsigned i
= 0; i
< sizeof (tab
) / sizeof (tab
[0]); i
++)
159 msg_Release (tab
[i
]);
162 libvlc_log_iterator_t
*libvlc_log_get_iterator( const libvlc_log_t
*p_log
)
167 struct libvlc_log_iterator_t
*p_iter
= malloc (sizeof (*p_iter
));
168 if (unlikely(p_iter
== NULL
))
170 libvlc_printerr ("Not enough memory");
174 /* FIXME: break constant pointer constraints */
175 msg_cb_data_t
*data
= &((libvlc_log_t
*)p_log
)->data
;
177 vlc_spin_lock (&data
->lock
);
178 p_iter
->p_data
= data
;
180 p_iter
->i_end
= data
->count
;
181 vlc_spin_unlock (&data
->lock
);
185 void libvlc_log_iterator_free( libvlc_log_iterator_t
*p_iter
)
190 int libvlc_log_iterator_has_next( const libvlc_log_iterator_t
*p_iter
)
194 return p_iter
->i_pos
!= p_iter
->i_end
;
197 libvlc_log_message_t
*libvlc_log_iterator_next( libvlc_log_iterator_t
*p_iter
,
198 libvlc_log_message_t
*buffer
)
204 assert (buffer
!= NULL
);
206 i_pos
= p_iter
->i_pos
;
207 if( i_pos
!= p_iter
->i_end
)
210 vlc_spin_lock (&p_iter
->p_data
->lock
);
211 msg
= p_iter
->p_data
->items
[i_pos
];
212 buffer
->i_severity
= msg
->i_type
;
213 buffer
->psz_type
= msg
->psz_object_type
;
214 buffer
->psz_name
= msg
->psz_module
;
215 buffer
->psz_header
= msg
->psz_header
;
216 buffer
->psz_message
= msg
->psz_msg
;
217 vlc_spin_unlock (&p_iter
->p_data
->lock
);