Added ability to override default logging implementation with

-DUSE_LOGGER

lladd/constants.h

@@ -94,6 +94,10 @@ terms specified in this license.
 #define BUFFER_MANAGER_REOPEN 0 
 #define BUFFER_MANAGER_HASH   1
 #define BUFFER_MANAGER_MEM_ARRAY 2
+
+#define LOG_TO_FILE   0
+#define LOG_TO_MEMORY 1
+
 #define MAX_TRANSACTIONS 1000
 
 /** Operation types */

lladd/logger/logger2.h

@@ -83,9 +83,20 @@ typedef struct {
   lsn_t recLSN;
 } TransactionLog;
 
-#define LOG_TO_FILE   0
-#define LOG_TO_MEMORY 1
+/** 
+    This is the log implementation that is being used.  
+    Before Stasis is intialized, it will be set to a default value.
+    
+    It may be changed before Tinit() is called by assigning to it.
 
+    The default can be overriddent at compile time by defining
+    USE_LOGGER
+
+    (eg: gcc ... -DUSE_LOGGER=LOG_TO_FOO)
+
+    @see constants.h for a list of recognized log implementations.
+
+ */
 extern int loggerType;
 
 int  LogInit(int logType);

src/lladd/logger/logger2.c

@@ -59,7 +59,11 @@ terms specified in this license.
 
 #include "page.h"  
 
+#ifdef USE_LOGGER
+int loggerType = USE_LOGGER;
+#else
 int loggerType = LOG_TO_FILE;
+#endif
 
 extern int numActiveXactions;
 static int pendingCommits;