1 /*****************************************************************************
2 * intf_msg.c: messages interface
3 * This library provides basic functions for threads to interact with user
4 * interface, such as message output. See config.h for output configuration.
5 *****************************************************************************
6 * Copyright (C) 1998, 1999, 2000 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
30 #include <errno.h> /* errno */
31 #include <fcntl.h> /* O_CREAT, O_TRUNC, O_WRONLY, O_SYNC */
32 #include <stdio.h> /* required */
33 #include <stdarg.h> /* va_list for BSD */
34 #include <stdlib.h> /* malloc() */
35 #include <string.h> /* strerror() */
36 #include <unistd.h> /* close(), write() */
44 #include "interface.h"
45 #include "intf_console.h"
49 /*****************************************************************************
51 *****************************************************************************
52 * Store a single message. Messages have a maximal size of INTF_MSG_MSGSIZE.
53 * If DEBUG is defined, messages have a date field and debug messages are
54 * printed with a date to allow more precise profiling.
55 *****************************************************************************/
58 int i_type; /* message type, see below */
59 char * psz_msg; /* the message itself */
62 /* Debugging informations - in DEBUG mode, debug messages have calling
63 * location informations printed */
64 mtime_t date; /* date of the message */
65 char * psz_file; /* file in which the function was called */
66 char * psz_function; /* function from which the function was called */
67 int i_line; /* line at which the function was called */
72 #define INTF_MSG_STD 0 /* standard message */
73 #define INTF_MSG_ERR 1 /* error message */
74 #define INTF_MSG_INTF 2 /* interface message */
75 #define INTF_MSG_DBG 3 /* debug message */
76 #define INTF_MSG_WARN 4 /* warning message*/
79 /*****************************************************************************
81 *****************************************************************************
82 * Store all data requiered by messages interfaces. It has a single reference
84 *****************************************************************************/
85 typedef struct intf_msg_s
89 vlc_mutex_t lock; /* message queue lock */
90 int i_count; /* number of messages stored */
91 intf_msg_item_t msg[INTF_MSG_QSIZE]; /* message queue */
96 int i_log_file; /* log file */
100 #if !defined(INTF_MSG_QUEUE) && !defined(DEBUG_LOG)
101 /* If neither messages queue, neither log file is used, then the structure
102 * is empty. However, empty structures are not allowed in C. Therefore, a
103 * dummy integer is used to fill it. */
104 int i_dummy; /* unused filler */
106 // int i_warning_level;
109 /*****************************************************************************
111 *****************************************************************************/
113 static void QueueMsg ( intf_msg_t *p_msg, int i_type,
114 char *psz_format, va_list ap );
115 static void PrintMsg ( intf_msg_item_t *p_msg );
117 static void QueueDbgMsg ( intf_msg_t *p_msg, char *psz_file,
118 char *psz_function, int i_line,
119 char *psz_format, va_list ap );
121 #ifdef INTF_MSG_QUEUE
122 static void FlushLockedMsg ( intf_msg_t *p_msg );
126 /*****************************************************************************
127 * intf_MsgCreate: initialize messages interface (ok ?)
128 *****************************************************************************
129 * This functions has to be called before any call to other intf_*Msg functions.
130 * It set up the locks and the message queue if it is used.
131 *****************************************************************************/
132 p_intf_msg_t intf_MsgCreate( void )
136 /* Allocate structure */
137 p_msg = malloc( sizeof( intf_msg_t ) );
144 #ifdef INTF_MSG_QUEUE
145 /* Message queue initialization */
146 vlc_mutex_init( &p_msg->lock ); /* intialize lock */
147 p_msg->i_count = 0; /* queue is empty */
152 /* Log file initialization - on failure, file pointer will be null,
153 * and no log will be issued, but this is not considered as an
155 p_msg->i_log_file = open( DEBUG_LOG, O_CREAT | O_TRUNC |
168 /*****************************************************************************
169 * intf_MsgDestroy: free resources allocated by intf_InitMsg (ok ?)
170 *****************************************************************************
171 * This functions prints all messages remaining in queue, then free all the
172 * resources allocated by intf_InitMsg.
173 * No other messages interface functions should be called after this one.
174 *****************************************************************************/
175 void intf_MsgDestroy( void )
177 intf_FlushMsg(); /* print all remaining messages */
180 /* Close log file if any */
181 if( p_main->p_msg->i_log_file >= 0 )
183 close( p_main->p_msg->i_log_file );
188 free( p_main->p_msg );
191 /*****************************************************************************
192 * intf_Msg: print a message (ok ?)
193 *****************************************************************************
194 * This function queue a message for later printing, or print it immediately
195 * if the queue isn't used.
196 *****************************************************************************/
197 void intf_Msg( char *psz_format, ... )
201 va_start( ap, psz_format );
202 QueueMsg( p_main->p_msg, INTF_MSG_STD, psz_format, ap );
206 /*****************************************************************************
207 * intf_ErrMsg : print an error message (ok ?)
208 *****************************************************************************
209 * This function is the same as intf_Msg, except that it prints its messages
211 *****************************************************************************/
212 void intf_ErrMsg( char *psz_format, ... )
216 va_start( ap, psz_format );
217 QueueMsg( p_main->p_msg, INTF_MSG_ERR, psz_format, ap );
221 /*****************************************************************************
222 * intf_WarnMsg : print a warning message
223 *****************************************************************************
224 * This function is the same as intf_Msg, except that it concerns warning
225 * messages for testing purpose.
226 *****************************************************************************/
227 void intf_WarnMsg( int i_level, char *psz_format, ... )
231 if( i_level >= p_main->p_intf->i_warning_level )
233 va_start( ap, psz_format );
234 QueueMsg( p_main->p_msg, INTF_MSG_WARN, psz_format, ap );
240 /*****************************************************************************
241 * intf_IntfMsg : print an interface message (ok ?)
242 *****************************************************************************
243 * In opposition to all other intf_*Msg function, this function does not print
244 * it's message on default terminal (stdout or stderr), but send it to
245 * interface (in fact to the X11 console). This means that the interface MUST
246 * be initialized and a X11 console openned before this function is used, and
247 * that once the console is closed, this call is vorbidden.
248 * Practically, only the interface thread itself should call this function, and
249 * flush all messages before intf_CloseX11Console() is called.
250 *****************************************************************************/
251 void intf_IntfMsg(char *psz_format, ...)
255 va_start( ap, psz_format );
256 QueueMsg( p_main->p_msg, INTF_MSG_INTF, psz_format, ap );
260 /*****************************************************************************
261 * _intf_DbgMsg: print a debugging message (ok ?)
262 *****************************************************************************
263 * This function prints a debugging message. Compared to other intf_*Msg
264 * functions, it is only defined if DEBUG is defined and require a file name,
265 * a function name and a line number as additionnal debugging informations. It
266 * also prints a debugging header for each received line.
267 *****************************************************************************/
269 void _intf_DbgMsg( char *psz_file, char *psz_function, int i_line,
270 char *psz_format, ...)
274 va_start( ap, psz_format );
275 QueueDbgMsg( p_main->p_msg, psz_file, psz_function, i_line,
281 /*****************************************************************************
282 * intf_MsgImm: print a message (ok ?)
283 *****************************************************************************
284 * This function prints a message immediately. If the queue is used, all
285 * waiting messages are also printed.
286 *****************************************************************************/
287 void intf_MsgImm( char *psz_format, ... )
291 va_start( ap, psz_format );
292 QueueMsg( p_main->p_msg, INTF_MSG_STD, psz_format, ap );
297 /*****************************************************************************
298 * intf_ErrMsgImm: print an error message immediately (ok ?)
299 *****************************************************************************
300 * This function is the same as intf_MsgImm, except that it prints its message
302 *****************************************************************************/
303 void intf_ErrMsgImm(char *psz_format, ...)
307 va_start( ap, psz_format );
308 QueueMsg( p_main->p_msg, INTF_MSG_ERR, psz_format, ap );
313 /*****************************************************************************
314 * intf_WarnMsgImm : print a warning message
315 *****************************************************************************
316 * This function is the same as intf_MsgImm, except that it concerns warning
317 * messages for testing purpose.
318 *****************************************************************************/
319 void intf_WarnMsgImm( int i_level, char *psz_format, ... )
323 if( i_level >= p_main->p_intf->i_warning_level )
325 va_start( ap, psz_format );
326 QueueMsg( p_main->p_msg, INTF_MSG_WARN, psz_format, ap );
334 /*****************************************************************************
335 * _intf_DbgMsgImm: print a debugging message immediately (ok ?)
336 *****************************************************************************
337 * This function is the same as intf_DbgMsgImm, except that it prints its
338 * message immediately. It should only be called through the macro
340 *****************************************************************************/
342 void _intf_DbgMsgImm( char *psz_file, char *psz_function, int i_line,
343 char *psz_format, ...)
347 va_start( ap, psz_format );
348 QueueDbgMsg( p_main->p_msg, psz_file, psz_function, i_line,
355 /*****************************************************************************
356 * intf_FlushMsg (ok ?)
357 *****************************************************************************
358 * Print all messages remaining in queue: get lock and call FlushLockedMsg.
359 * This function does nothing if the message queue isn't used.
360 * This function is only implemented if message queue is used. If not, it is
362 *****************************************************************************/
363 #ifdef INTF_MSG_QUEUE
364 void intf_FlushMsg( void )
366 vlc_mutex_lock( &p_main->p_msg->lock ); /* get lock */
367 FlushLockedMsg( p_main->p_msg ); /* flush messages */
368 vlc_mutex_unlock( &p_main->p_msg->lock ); /* give lock back */
372 /* following functions are local */
374 /*****************************************************************************
375 * QueueMsg: add a message to a queue
376 *****************************************************************************
377 * This function provide basic functionnalities to other intf_*Msg functions.
378 * It add a message to a queue (after having printed all stored messages if it
379 * is full. If the message can't be converted to string in memory, it exit the
380 * program. If the queue is not used, it prints the message immediately.
381 *****************************************************************************/
382 static void QueueMsg( intf_msg_t *p_msg, int i_type, char *psz_format, va_list ap )
384 char * psz_str; /* formatted message string */
385 intf_msg_item_t * p_msg_item; /* pointer to message */
387 #ifndef INTF_MSG_QUEUE /*................................... instant mode ...*/
388 intf_msg_item_t msg_item; /* message */
389 p_msg_item = &msg_item;
390 #endif /*....................................................................*/
393 * Convert message to string
396 psz_str = (char*) malloc( strlen(psz_format) + INTF_MAX_MSG_SIZE );
397 vsprintf( psz_str, psz_format, ap );
399 vasprintf( &psz_str, psz_format, ap );
401 if( psz_str == NULL )
403 fprintf(stderr, "warning: can't store following message (%s): ",
405 vfprintf(stderr, psz_format, ap );
409 #ifdef INTF_MSG_QUEUE /*...................................... queue mode ...*/
410 vlc_mutex_lock( &p_msg->lock ); /* get lock */
411 if( p_msg->i_count == INTF_MSG_QSIZE ) /* flush queue if needed */
413 #ifdef DEBUG /* in debug mode, queue overflow causes a warning */
414 fprintf(stderr, "warning: message queue overflow\n" );
416 FlushLockedMsg( p_msg );
418 p_msg_item = p_msg->msg + p_msg->i_count++; /* select message */
419 #endif /*.............................................. end of queue mode ...*/
422 * Fill message information fields
424 p_msg_item->i_type = i_type;
425 p_msg_item->psz_msg = psz_str;
427 #ifdef INTF_MSG_QUEUE /*......................................... queue mode */
428 vlc_mutex_unlock( &p_msg->lock ); /* give lock back */
429 #else /*....................................................... instant mode */
430 PrintMsg( p_msg_item ); /* print message */
431 free( psz_str ); /* free message data */
432 #endif /*....................................................................*/
435 /*****************************************************************************
436 * QueueDbgMsg: add a message to a queue with debugging informations
437 *****************************************************************************
438 * This function is the same as QueueMsg, except that it is only defined when
439 * DEBUG is define, and require additionnal debugging informations.
440 *****************************************************************************/
442 static void QueueDbgMsg(intf_msg_t *p_msg, char *psz_file, char *psz_function,
443 int i_line, char *psz_format, va_list ap)
445 char * psz_str; /* formatted message string */
446 intf_msg_item_t * p_msg_item; /* pointer to message */
448 #ifndef INTF_MSG_QUEUE /*................................... instant mode ...*/
449 intf_msg_item_t msg_item; /* message */
450 p_msg_item = &msg_item;
451 #endif /*....................................................................*/
454 * Convert message to string
457 psz_str = (char*) malloc( INTF_MAX_MSG_SIZE );
458 vsprintf( psz_str, psz_format, ap );
460 vasprintf( &psz_str, psz_format, ap );
462 if( psz_str == NULL )
464 fprintf(stderr, "warning: can't store following message (%s): ",
466 fprintf(stderr, INTF_MSG_DBG_FORMAT, psz_file, psz_function, i_line );
467 vfprintf(stderr, psz_format, ap );
471 #ifdef INTF_MSG_QUEUE /*...................................... queue mode ...*/
472 vlc_mutex_lock( &p_msg->lock ); /* get lock */
473 if( p_msg->i_count == INTF_MSG_QSIZE ) /* flush queue if needed */
475 #ifdef DEBUG /* in debug mode, queue overflow causes a warning */
476 fprintf(stderr, "warning: message queue overflow\n" );
478 FlushLockedMsg( p_msg );
480 p_msg_item = p_msg->msg + p_msg->i_count++; /* select message */
481 #endif /*.............................................. end of queue mode ...*/
484 * Fill message information fields
486 p_msg_item->i_type = INTF_MSG_DBG;
487 p_msg_item->psz_msg = psz_str;
488 p_msg_item->psz_file = psz_file;
489 p_msg_item->psz_function = psz_function;
490 p_msg_item->i_line = i_line;
491 p_msg_item->date = mdate();
493 #ifdef INTF_MSG_QUEUE /*......................................... queue mode */
494 vlc_mutex_unlock( &p_msg->lock ); /* give lock back */
495 #else /*....................................................... instant mode */
496 PrintMsg( p_msg_item ); /* print message */
497 free( psz_str ); /* free message data */
498 #endif /*....................................................................*/
502 /*****************************************************************************
503 * FlushLockedMsg (ok ?)
504 *****************************************************************************
505 * Print all messages remaining in queue. MESSAGE QUEUE MUST BE LOCKED, since
506 * this function does not check the lock. This function is only defined if
507 * INTF_MSG_QUEUE is defined.
508 *****************************************************************************/
509 #ifdef INTF_MSG_QUEUE
510 static void FlushLockedMsg ( intf_msg_t *p_msg )
514 for( i_index = 0; i_index < p_msg->i_count; i_index++ )
516 /* Print message and free message data */
517 PrintMsg( &p_msg->msg[i_index] );
518 free( p_msg->msg[i_index].psz_msg );
525 /*****************************************************************************
526 * PrintMsg: print a message (ok ?)
527 *****************************************************************************
528 * Print a single message. The message data is not freed. This function exists
529 * in two version. The DEBUG version prints a date with each message, and is
530 * able to log messages (if DEBUG_LOG is defined).
531 * The normal one just prints messages to the screen.
532 *****************************************************************************/
535 static void PrintMsg( intf_msg_item_t *p_msg )
537 char psz_date[MSTRTIME_MAX_SIZE]; /* formatted time buffer */
538 char * psz_msg; /* message buffer */
540 /* Format message - the message is formatted here because in case the log
541 * file is used, it avoids another format string parsing */
542 switch( p_msg->i_type )
544 case INTF_MSG_STD: /* regular messages */
546 asprintf( &psz_msg, "%s", p_msg->psz_msg );
549 case INTF_MSG_WARN: /* Warning message */
550 asprintf( &psz_msg, "%s", p_msg->psz_msg );
553 case INTF_MSG_INTF: /* interface messages */
554 asprintf( &psz_msg, "%s", p_msg->psz_msg );
557 case INTF_MSG_DBG: /* debug messages */
558 mstrtime( psz_date, p_msg->date );
559 asprintf( &psz_msg, "(%s) " INTF_MSG_DBG_FORMAT "%s",
560 psz_date, p_msg->psz_file, p_msg->psz_function, p_msg->i_line,
565 /* Check if formatting function succeeded */
566 if( psz_msg == NULL )
568 fprintf( stderr, "error: can not format message (%s): %s\n",
569 strerror( errno ), p_msg->psz_msg );
576 switch( p_msg->i_type )
578 case INTF_MSG_STD: /* standard messages */
579 fprintf( stdout, psz_msg );
581 case INTF_MSG_ERR: /* error messages */
583 #ifndef DEBUG_LOG_ONLY
584 case INTF_MSG_DBG: /* debugging messages */
586 fprintf( stderr, psz_msg );
588 case INTF_MSG_INTF: /* interface messages */
589 intf_ConsolePrint( p_main->p_intf->p_console, psz_msg );
594 /* Append all messages to log file */
595 if( p_main->p_msg->i_log_file >= 0 )
597 write( p_main->p_msg->i_log_file, psz_msg, strlen( psz_msg ) );
601 /* Free formatted message */
607 static void PrintMsg( intf_msg_item_t *p_msg )
610 * Print messages on screen
612 switch( p_msg->i_type )
614 case INTF_MSG_STD: /* standard messages */
615 case INTF_MSG_DBG: /* debug messages */
616 fprintf( stdout, p_msg->psz_msg );
618 case INTF_MSG_ERR: /* error messages */
620 fprintf( stderr, p_msg->psz_msg ); /* warning message */
622 case INTF_MSG_INTF: /* interface messages */
623 intf_ConsolePrint( p_main->p_intf->p_console, p_msg->psz_msg );