qemu-log.h

   1 #ifndef QEMU_LOG_H
   2 #define QEMU_LOG_H
   3
   4 /* The deprecated global variables: */
   5 extern FILE *logfile;
   6 extern int loglevel;
   7
   8
   9 /*
  10  * The new API:
  11  *
  12  */
  13
  14 /* Log settings checking macros: */
  15
  16 /* Returns true if qemu_log() will really write somewhere
  17  */
  18 #define qemu_log_enabled() (logfile != NULL)
  19
  20 /* Returns true if a bit is set in the current loglevel mask
  21  */
  22 #define qemu_loglevel_mask(b) ((loglevel & (b)) != 0)
  23
  24
  25 /* Logging functions: */
  26
  27 /* main logging function
  28  */
  29 #define qemu_log(...) do {                 \
  30         if (logfile)                       \
  31             fprintf(logfile, ## __VA_ARGS__); \
  32     } while (0)
  33
  34 /* vfprintf-like logging function
  35  */
  36 #define qemu_log_vprintf(fmt, va) do {     \
  37         if (logfile)                       \
  38             vfprintf(logfile, fmt, va);    \
  39     } while (0)
  40
  41 /* log only if a bit is set on the current loglevel mask
  42  */
  43 #define qemu_log_mask(b, ...) do {         \
  44         if (loglevel & (b))                \
  45             fprintf(logfile, ## __VA_ARGS__); \
  46     } while (0)
  47
  48
  49
  50
  51 /* Special cases: */
  52
  53 #ifdef NEED_CPU_H
  54 /* cpu_dump_state() logging functions: */
  55 #define log_cpu_state(env, f) cpu_dump_state((env), logfile, fprintf, (f));
  56 #define log_cpu_state_mask(b, env, f) do {           \
  57       if (loglevel & (b)) log_cpu_state((env), (f)); \
  58   } while (0)
  59
  60 /* disas() and target_disas() to logfile: */
  61 #define log_target_disas(start, len, flags) \
  62         target_disas(logfile, (start), (len), (flags))
  63 #define log_disas(start, len) \
  64         disas(logfile, (start), (len))
  65
  66 /* page_dump() output to the log file: */
  67 #define log_page_dump() page_dump(logfile)
  68 #endif
  69
  70
  71
  72 /* Maintenance: */
  73
  74 /* fflush() the log file */
  75 #define qemu_log_flush() fflush(logfile)
  76
  77 /* Close the log file */
  78 #define qemu_log_close() do { \
  79         fclose(logfile);      \
  80         logfile = NULL;       \
  81     } while (0)
  82
  83 /* Set up a new log file */
  84 #define qemu_log_set_file(f) do { \
  85         logfile = (f);            \
  86     } while (0)
  87
  88 /* Set up a new log file, only if none is set */
  89 #define qemu_log_try_set_file(f) do { \
  90         if (!logfile)                 \
  91             logfile = (f);            \
  92     } while (0)
  93
  94
  95 #endif