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[Qemu-devel] [6333] Define macros that will become the new logging API (
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [6333] Define macros that will become the new logging API (Eduardo Habkost) |
Date: |
Thu, 15 Jan 2009 21:52:11 +0000 |
Revision: 6333
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6333
Author: aliguori
Date: 2009-01-15 21:52:11 +0000 (Thu, 15 Jan 2009)
Log Message:
-----------
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 <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Modified Paths:
--------------
trunk/qemu-log.h
Modified: trunk/qemu-log.h
===================================================================
--- trunk/qemu-log.h 2009-01-15 21:48:06 UTC (rev 6332)
+++ trunk/qemu-log.h 2009-01-15 21:52:11 UTC (rev 6333)
@@ -1,7 +1,93 @@
#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
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