Fix MDB_txninfo.mt2 padding on Windows/Apple

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 4e3d70dc132c9be65c672e19a4b2af50fdc08770..b714119c1069933f1e8b1254982cddca1e44e23f 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -202,6 +202,8 @@
 
 #if defined(_WIN32) || defined(__APPLE__)
 #define MNAME_LEN      32
+#else
+#define MNAME_LEN      (sizeof(pthread_mutex_t))
 #endif
 
 /** @} */
@@ -543,7 +545,7 @@ typedef struct MDB_txninfo {
                pthread_mutex_t mt2_wmutex;
 #define mti_wmutex     mt2.mt2_wmutex
 #endif
-               char pad[(sizeof(pthread_mutex_t)+CACHELINE-1) & ~(CACHELINE-1)];
+               char pad[(MNAME_LEN+CACHELINE-1) & ~(CACHELINE-1)];
        } mt2;
        MDB_reader      mti_readers[1];
 } MDB_txninfo;