Changeset efdfebc in mainline for uspace/lib/usb/src/debug.c


Ignore:
Timestamp:
2012-11-06T21:03:44Z (12 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
338810f
Parents:
de73242 (diff), 94795812 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge mainline changes.

File:
1 edited

Legend:

Unmodified
Added
Removed

  • uspace/lib/usb/src/debug.c

    rde73242 refdfebc  
    4040#include <ddf/log.h>
    4141#include <usb/debug.h>
    42 
    43 /** Level of logging messages. */
    44 static usb_log_level_t log_level = USB_LOG_LEVEL_WARNING;
    45 
    46 /** Prefix for logging messages. */
    47 static const char *log_prefix = "usb";
    48 
    49 /** Serialization mutex for logging functions. */
    50 static FIBRIL_MUTEX_INITIALIZE(log_serializer);
    51 
    52 /** File where to store the log. */
    53 static FILE *log_stream = NULL;
    54 
    55 
    56 /** Enable logging.
    57  *
    58  * @param level Maximal enabled level (including this one).
    59  * @param message_prefix Prefix for each printed message.
    60  */
    61 void usb_log_enable(usb_log_level_t level, const char *message_prefix)
    62 {
    63         log_prefix = message_prefix;
    64         log_level = level;
    65         if (log_stream == NULL) {
    66                 char *fname;
    67                 int rc = asprintf(&fname, "/log/%s", message_prefix);
    68                 if (rc > 0) {
    69                         log_stream = fopen(fname, "w");
    70                         if (log_stream != NULL)
    71                                 setvbuf(log_stream, NULL, _IOFBF, BUFSIZ);
    72                        
    73                         free(fname);
    74                 }
    75         }
    76 }
    77 
    78 /** Get log level name prefix.
    79  *
    80  * @param level Log level.
    81  * @return String prefix for the message.
    82  */
    83 static const char *log_level_name(usb_log_level_t level)
    84 {
    85         switch (level) {
    86                 case USB_LOG_LEVEL_FATAL:
    87                         return " FATAL";
    88                 case USB_LOG_LEVEL_ERROR:
    89                         return " ERROR";
    90                 case USB_LOG_LEVEL_WARNING:
    91                         return " WARN";
    92                 case USB_LOG_LEVEL_INFO:
    93                         return " info";
    94                 default:
    95                         return "";
    96         }
    97 }
    98 
    99 /** Print logging message.
    100  *
    101  * @param level Verbosity level of the message.
    102  * @param format Formatting directive.
    103  */
    104 void usb_log_printf(usb_log_level_t level, const char *format, ...)
    105 {
    106         FILE *screen_stream = NULL;
    107         switch (level) {
    108                 case USB_LOG_LEVEL_FATAL:
    109                 case USB_LOG_LEVEL_ERROR:
    110                         screen_stream = stderr;
    111                         break;
    112                 default:
    113                         screen_stream = stdout;
    114                         break;
    115         }
    116         assert(screen_stream != NULL);
    117 
    118         va_list args;
    119 
    120         /*
    121          * Serialize access to log files.
    122          * Print to screen only messages with higher level than the one
    123          * specified during logging initialization.
    124          * Print also to file, to it print one more (lower) level as well.
    125          */
    126         fibril_mutex_lock(&log_serializer);
    127 
    128         const char *level_name = log_level_name(level);
    129 
    130         if ((log_stream != NULL) && (level <= log_level + 1)) {
    131                 va_start(args, format);
    132 
    133                 fprintf(log_stream, "[%s]%s: ", log_prefix, level_name);
    134                 vfprintf(log_stream, format, args);
    135                 fflush(log_stream);
    136 
    137                 va_end(args);
    138         }
    139 
    140         if (level <= log_level) {
    141                 va_start(args, format);
    142 
    143                 fprintf(screen_stream, "[%s]%s: ", log_prefix, level_name);
    144                 vfprintf(screen_stream, format, args);
    145                 fflush(screen_stream);
    146 
    147                 va_end(args);
    148         }
    149 
    150         fibril_mutex_unlock(&log_serializer);
    151 }
    152 
    15342
    15443#define REMAINDER_STR_FMT " (%zu)..."
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