From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 17 Nov 2011 18:36:00 +0000 (-0500)
Subject: usterr-signal-safe.h: ensure all macros are trivial (10 lines max)
X-Git-Tag: v1.9.1~90
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=648bb724009f530ce81acfd380abec1ecfc0d1c1;p=lttng-ust.git

usterr-signal-safe.h: ensure all macros are trivial (10 lines max)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/include/lttng/usterr-signal-safe.h b/include/lttng/usterr-signal-safe.h
index b8e03dbd..3e07d33b 100644
--- a/include/lttng/usterr-signal-safe.h
+++ b/include/lttng/usterr-signal-safe.h
@@ -67,29 +67,18 @@ static inline void __attribute__ ((format (printf, 1, 2)))
 {
 }
 
+/* Can't use dynamic allocation. Limit ourselves to USTERR_MAX_LEN chars. */
+/* Add end of string in case of buffer overflow. */
 #define sigsafe_print_err(fmt, args...)					\
-{									\
-	/* Can't use dynamic allocation. Limit ourselves to USTERR_MAX_LEN chars. */ \
+do {									\
 	char ____buf[USTERR_MAX_LEN];					\
 	int ____saved_errno;						\
-									\
-	/* Save the errno. */						\
-	____saved_errno = errno;					\
-									\
+	____saved_errno = errno;	/* signal-safety */		\
 	ust_safe_snprintf(____buf, sizeof(____buf), fmt, ## args);	\
-									\
-	/* Add end of string in case of buffer overflow. */		\
 	____buf[sizeof(____buf) - 1] = 0;				\
-									\
 	patient_write(STDERR_FILENO, ____buf, strlen(____buf));		\
-	/*								\
-	 * Can't print errors because we are in the error printing code \
-	 * path.							\
-	 */								\
-									\
-	/* Restore errno, in order to be async-signal safe. */		\
-	errno = ____saved_errno;					\
-}
+	errno = ____saved_errno;	/* signal-safety */		\
+} while (0)
 
 #define UST_STR_COMPONENT UST_XSTR(UST_COMPONENT)