branches/zip: log_reserve_and_write_fast(): Correct a race condition

in UNIV_LOG_LSN_DEBUG. This could have caused Issue #440.

branches/zip: log_reserve_and_write_fast(): Correct a race condition
in UNIV_LOG_LSN_DEBUG. This could have caused Issue #440.
b045a484 · marko · 9f00612b · b045a484
Commit b045a484 authored Feb 16, 2010 by marko
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Showing with 6 additions and 3 deletions

include/log0log.ic include/log0log.ic +6 -3

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--- a/include/log0log.ic
+++ b/include/log0log.ic
@@ -314,12 +314,15 @@ log_reserve_and_write_fast(
 	ulint		data_len;
 #ifdef UNIV_LOG_LSN_DEBUG
 	/* length of the LSN pseudo-record */
-	ulint		lsn_len = 1
-		+ mach_get_compressed_size(log_sys->lsn >> 32)
-		+ mach_get_compressed_size(log_sys->lsn & 0xFFFFFFFFUL);
+	ulint		lsn_len;
 #endif /* UNIV_LOG_LSN_DEBUG */

 	mutex_enter(&log_sys->mutex);
+#ifdef UNIV_LOG_LSN_DEBUG
+	lsn_len = 1
+		+ mach_get_compressed_size(log_sys->lsn >> 32)
+		+ mach_get_compressed_size(log_sys->lsn & 0xFFFFFFFFUL);
+#endif /* UNIV_LOG_LSN_DEBUG */

 	data_len = len
 #ifdef UNIV_LOG_LSN_DEBUG