qemu/qemu-log.h
aliguori 6d2c51466e Define macros that will become the new logging API (Eduardo Habkost)
These macros are NOT a proposal for a definitive new logging API. They
are just a step for it: a way to mark all usage patterns of the
logfile/loglevel variables on a single place.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6333 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-15 21:52:11 +00:00

94 lines
2.1 KiB
C

#ifndef QEMU_LOG_H
#define QEMU_LOG_H
/* The deprecated global variables: */
extern FILE *logfile;
extern int loglevel;
/*
* The new API:
*
*/
/* Log settings checking macros: */
/* Returns true if qemu_log() will really write somewhere
*/
#define qemu_log_enabled() (logfile != NULL)
/* Returns true if a bit is set in the current loglevel mask
*/
#define qemu_loglevel_mask(b) ((loglevel & (b)) != 0)
/* Logging functions: */
/* main logging function
*/
#define qemu_log(...) do { \
if (logfile) \
fprintf(logfile, ## __VA_ARGS__); \
} while (0)
/* vfprintf-like logging function
*/
#define qemu_log_vprintf(fmt, va) do { \
if (logfile) \
vfprintf(logfile, fmt, va); \
} while (0)
/* log only if a bit is set on the current loglevel mask
*/
#define qemu_log_mask(b, ...) do { \
if (loglevel & (b)) \
fprintf(logfile, ## __VA_ARGS__); \
} while (0)
/* Special cases: */
/* cpu_dump_state() logging functions: */
#define log_cpu_state(env, f) cpu_dump_state((env), logfile, fprintf, (f));
#define log_cpu_state_mask(b, env, f) do { \
if (loglevel & (b)) log_cpu_state((env), (f)); \
} while (0)
/* disas() and target_disas() to logfile: */
#define log_target_disas(start, len, flags) \
target_disas(logfile, (start), (len), (flags))
#define log_disas(start, len) \
disas(logfile, (start), (len))
/* page_dump() output to the log file: */
#define log_page_dump() page_dump(logfile)
/* Maintenance: */
/* fflush() the log file */
#define qemu_log_flush() fflush(logfile)
/* Close the log file */
#define qemu_log_close() do { \
fclose(logfile); \
logfile = NULL; \
} while (0)
/* Set up a new log file */
#define qemu_log_set_file(f) do { \
logfile = (f); \
} while (0)
/* Set up a new log file, only if none is set */
#define qemu_log_try_set_file(f) do { \
if (!logfile) \
logfile = (f); \
} while (0)
#endif