include/qemu/log-for-trace.h

   1 /* log-for-trace.h: logging basics required by the trace.h generated
   2  * by the log trace backend.
   3  *
   4  * This should not be included directly by any .c file: if you
   5  * need to use the logging functions include "qemu/log.h".
   6  *
   7  * The purpose of splitting these parts out into their own header
   8  * is to catch the easy mistake where a .c file includes trace.h
   9  * but forgets to include qemu/log.h. Without this split, that
  10  * would result in the .c file compiling fine when the default
  11  * trace backend is in use but failing to compile with any other
  12  * backend.
  13  *
  14  * This code is licensed under the GNU General Public License,
  15  * version 2 or (at your option) any later version.
  16  */
  17
  18 #ifndef QEMU_LOG_FOR_TRACE_H
  19 #define QEMU_LOG_FOR_TRACE_H
  20
  21 /* Private global variable, don't use */
  22 extern int qemu_loglevel;
  23
  24 #define LOG_TRACE          (1 << 15)
  25
  26 /* Returns true if a bit is set in the current loglevel mask */
  27 static inline bool qemu_loglevel_mask(int mask)
  28 {
  29     return (qemu_loglevel & mask) != 0;
  30 }
  31
  32 /* main logging function */
  33 int GCC_FMT_ATTR(1, 2) qemu_log(const char *fmt, ...);
  34
  35 #endif