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
, libvlc_exception_t
*p_e
)
94 struct libvlc_log_t
*p_log
=
95 (struct libvlc_log_t
*)malloc(sizeof(struct libvlc_log_t
));
97 if( !p_log
) RAISENULL( "Out of 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 RAISENULL( "Out of memory" );
111 libvlc_retain( p_instance
);
115 void libvlc_log_close( libvlc_log_t
*p_log
)
120 assert( p_log
->p_messages
);
121 msg_Unsubscribe(p_log
->p_messages
);
122 libvlc_release( p_log
->p_instance
);
123 libvlc_log_clear( p_log
);
124 vlc_spin_destroy( &p_log
->data
.lock
);
128 unsigned libvlc_log_count( const libvlc_log_t
*p_log
)
133 msg_cb_data_t
*data
= &((libvlc_log_t
*)p_log
)->data
;
136 /* We cannot lock due to constant pointer constraints. Break them.
137 * Even then, this si not really thread safe anyway. */
138 vlc_spin_lock (&data
->lock
);
140 vlc_spin_unlock (&data
->lock
);
144 void libvlc_log_clear( libvlc_log_t
*p_log
)
149 vlc_spin_lock (&p_log
->data
.lock
);
150 msg_item_t
*tab
[p_log
->data
.count
];
151 memcpy (tab
, p_log
->data
.items
, sizeof (tab
));
152 p_log
->data
.count
= 0;
153 vlc_spin_unlock (&p_log
->data
.lock
);
155 for (unsigned i
= 0; i
< sizeof (tab
) / sizeof (tab
[0]); i
++)
156 msg_Release (tab
[i
]);
159 libvlc_log_iterator_t
*libvlc_log_get_iterator( const libvlc_log_t
*p_log
,
160 libvlc_exception_t
*p_e
)
164 struct libvlc_log_iterator_t
*p_iter
=
165 (struct libvlc_log_iterator_t
*)malloc(sizeof(struct libvlc_log_iterator_t
));
166 /* FIXME: break constant pointer constraints */
167 msg_cb_data_t
*data
= &((libvlc_log_t
*)p_log
)->data
;
169 if( !p_iter
) RAISENULL( "Out of memory" );
171 vlc_spin_lock (&data
->lock
);
172 p_iter
->p_data
= data
;
174 p_iter
->i_end
= data
->count
;
175 vlc_spin_unlock (&data
->lock
);
179 RAISENULL("Invalid log object!");
182 void libvlc_log_iterator_free( libvlc_log_iterator_t
*p_iter
)
187 int libvlc_log_iterator_has_next( const libvlc_log_iterator_t
*p_iter
)
191 return p_iter
->i_pos
!= p_iter
->i_end
;
194 libvlc_log_message_t
*libvlc_log_iterator_next( libvlc_log_iterator_t
*p_iter
,
195 libvlc_log_message_t
*buffer
,
196 libvlc_exception_t
*p_e
)
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
);
220 RAISENULL("No more messages");