From 75dea6549bb911ed4e22bc9b382f02c4b67a97be Mon Sep 17 00:00:00 2001
From: David Goulet <david.goulet@polymtl.ca>
Date: Thu, 22 Sep 2011 18:17:19 -0400
Subject: [PATCH] Improve debugging and add PERROR call

Add three level of verbosity with DBG, DBG2 and DBG3.

Each perror() call from now on should use PERROR().

Migration to these new debug facilities will come later on and
progressively.

To increase debug level use -v, -vv and -vvv respectively.

Signed-off-by: David Goulet <david.goulet@polymtl.ca>
---
 include/lttngerr.h | 74 ++++++++++++++++++++++++++++++----------------
 1 file changed, 49 insertions(+), 25 deletions(-)

diff --git a/include/lttngerr.h b/include/lttngerr.h
index 062908098..c2f4d5198 100644
--- a/include/lttngerr.h
+++ b/include/lttngerr.h
@@ -29,35 +29,59 @@
 extern int opt_quiet;
 extern int opt_verbose;
 
-enum __lttng_print_type {
-	PRINT_ERR,
-	PRINT_WARN,
-	PRINT_BUG,
-	PRINT_DBG,
-	PRINT_MSG,
-};
+#define PRINT_ERR   0x1
+#define PRINT_WARN  0x2
+#define PRINT_BUG   0x3
+#define PRINT_MSG   0x4
+#define PRINT_DBG   0x10
+#define PRINT_DBG2  0x20
+#define PRINT_DBG3  0x30
 
 /*
- *  __lttng_print
- *
- *  Macro for printing message depending on
- *  command line option and verbosity.
+ * Macro for printing message depending on command line option and verbosity.
  */
-#define __lttng_print(type, fmt, args...)	\
-	do {							\
-		if (opt_quiet == 0) {		\
-			if (type == PRINT_MSG || (opt_verbose && type == PRINT_DBG)) {	\
-				fprintf(stdout, fmt, ## args);	\
-			} else if (type != PRINT_MSG && type != PRINT_DBG) {	\
-				fprintf(stderr, fmt, ## args);		\
-			}	\
-		}	\
+#define __lttng_print(type, fmt, args...)                                 \
+	do {                                                                  \
+		if (opt_quiet == 0) {                                             \
+			if (type == PRINT_MSG ||                                      \
+					((type & PRINT_DBG) && opt_verbose == 1) ||           \
+					((type & (PRINT_DBG | PRINT_DBG2)) &&                 \
+						opt_verbose == 2) ||                              \
+					((type & (PRINT_DBG | PRINT_DBG2 | PRINT_DBG3)) &&    \
+						opt_verbose == 3)) {                              \
+				fprintf(stdout, fmt, ## args);                            \
+			} else if (type & (PRINT_ERR | PRINT_WARN | PRINT_BUG)) {     \
+				fprintf(stderr, fmt, ## args);                            \
+			}                                                             \
+		}                                                                 \
 	} while (0);
 
-#define MSG(fmt, args...) __lttng_print(PRINT_MSG, fmt "\n", ## args)
-#define ERR(fmt, args...) __lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
-#define WARN(fmt, args...) __lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
-#define BUG(fmt, args...) __lttng_print(PRINT_BUG, "BUG: " fmt "\n", ## args)
-#define DBG(fmt, args...) __lttng_print(PRINT_DBG, "DEBUG: " fmt " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
+#define MSG(fmt, args...) \
+	__lttng_print(PRINT_MSG, fmt "\n", ## args)
+#define ERR(fmt, args...) \
+	__lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
+#define WARN(fmt, args...) \
+	__lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
+#define BUG(fmt, args...) \
+	__lttng_print(PRINT_BUG, "BUG: " fmt "\n", ## args)
+
+/* Three level of debug. Use -v, -vv or -vvv for the levels */
+#define DBG(fmt, args...) __lttng_print(PRINT_DBG, "DEBUG1: " fmt \
+		" [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
+#define DBG2(fmt, args...) __lttng_print(PRINT_DBG2, "DEBUG2: " fmt \
+		" [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
+#define DBG3(fmt, args...) __lttng_print(PRINT_DBG3, "DEBUG3: " fmt \
+		" [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
+
+#define _PERROR(fmt, args...) \
+	__lttng_print(PRINT_ERR, "perror " fmt "\n", ## args)
+
+#define PERROR(call, args...) \
+    do { \
+		char *buf; \
+		char tmp[200]; \
+		buf = strerror_r(errno, tmp, sizeof(tmp)); \
+		_PERROR(call ": %s", ## args, buf); \
+	} while(0);
 
 #endif /* _LTTNGERR_H */
-- 
2.34.1