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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
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aliguori
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Jan 15, 2009
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@@ -1,7 +1,93 @@ | ||
#ifndef QEMU_LOG_H | ||
#define QEMU_LOG_H | ||
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/* The deprecated global variables: */ | ||
extern FILE *logfile; | ||
extern int loglevel; | ||
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/* | ||
* The new API: | ||
* | ||
*/ | ||
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/* Log settings checking macros: */ | ||
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/* Returns true if qemu_log() will really write somewhere | ||
*/ | ||
#define qemu_log_enabled() (logfile != NULL) | ||
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/* Returns true if a bit is set in the current loglevel mask | ||
*/ | ||
#define qemu_loglevel_mask(b) ((loglevel & (b)) != 0) | ||
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/* Logging functions: */ | ||
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/* main logging function | ||
*/ | ||
#define qemu_log(...) do { \ | ||
if (logfile) \ | ||
fprintf(logfile, ## __VA_ARGS__); \ | ||
} while (0) | ||
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/* vfprintf-like logging function | ||
*/ | ||
#define qemu_log_vprintf(fmt, va) do { \ | ||
if (logfile) \ | ||
vfprintf(logfile, fmt, va); \ | ||
} while (0) | ||
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/* 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) | ||
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/* Special cases: */ | ||
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/* 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) | ||
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/* 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)) | ||
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/* page_dump() output to the log file: */ | ||
#define log_page_dump() page_dump(logfile) | ||
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/* Maintenance: */ | ||
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/* fflush() the log file */ | ||
#define qemu_log_flush() fflush(logfile) | ||
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/* Close the log file */ | ||
#define qemu_log_close() do { \ | ||
fclose(logfile); \ | ||
logfile = NULL; \ | ||
} while (0) | ||
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/* Set up a new log file */ | ||
#define qemu_log_set_file(f) do { \ | ||
logfile = (f); \ | ||
} while (0) | ||
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/* 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) | ||
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#endif |