Commit 6d2c51466e694895ed6cfe4b4bc8cd40300947bd
1 parent
d12d51d5
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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qemu-log.h
| 1 | #ifndef QEMU_LOG_H | 1 | #ifndef QEMU_LOG_H |
| 2 | #define QEMU_LOG_H | 2 | #define QEMU_LOG_H |
| 3 | 3 | ||
| 4 | +/* The deprecated global variables: */ | ||
| 4 | extern FILE *logfile; | 5 | extern FILE *logfile; |
| 5 | extern int loglevel; | 6 | extern int loglevel; |
| 6 | 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 | +/* cpu_dump_state() logging functions: */ | ||
| 54 | +#define log_cpu_state(env, f) cpu_dump_state((env), logfile, fprintf, (f)); | ||
| 55 | +#define log_cpu_state_mask(b, env, f) do { \ | ||
| 56 | + if (loglevel & (b)) log_cpu_state((env), (f)); \ | ||
| 57 | + } while (0) | ||
| 58 | + | ||
| 59 | +/* disas() and target_disas() to logfile: */ | ||
| 60 | +#define log_target_disas(start, len, flags) \ | ||
| 61 | + target_disas(logfile, (start), (len), (flags)) | ||
| 62 | +#define log_disas(start, len) \ | ||
| 63 | + disas(logfile, (start), (len)) | ||
| 64 | + | ||
| 65 | +/* page_dump() output to the log file: */ | ||
| 66 | +#define log_page_dump() page_dump(logfile) | ||
| 67 | + | ||
| 68 | + | ||
| 69 | + | ||
| 70 | +/* Maintenance: */ | ||
| 71 | + | ||
| 72 | +/* fflush() the log file */ | ||
| 73 | +#define qemu_log_flush() fflush(logfile) | ||
| 74 | + | ||
| 75 | +/* Close the log file */ | ||
| 76 | +#define qemu_log_close() do { \ | ||
| 77 | + fclose(logfile); \ | ||
| 78 | + logfile = NULL; \ | ||
| 79 | + } while (0) | ||
| 80 | + | ||
| 81 | +/* Set up a new log file */ | ||
| 82 | +#define qemu_log_set_file(f) do { \ | ||
| 83 | + logfile = (f); \ | ||
| 84 | + } while (0) | ||
| 85 | + | ||
| 86 | +/* Set up a new log file, only if none is set */ | ||
| 87 | +#define qemu_log_try_set_file(f) do { \ | ||
| 88 | + if (!logfile) \ | ||
| 89 | + logfile = (f); \ | ||
| 90 | + } while (0) | ||
| 91 | + | ||
| 92 | + | ||
| 7 | #endif | 93 | #endif |