Changed log manager API to support variable length formatted log strings. New API is as follows:

/** No change in these */
bool skygw_logmanager_init(void** buf, int argc, char* argv[]);
void skygw_logmanager_done(void** buf);
void skygw_logmanager_exit(void);
int  skygw_log_flush(logfile_id_t id);

/** writebuf remains unused, but formatted string is now possible and in case 
 * of formatted string, arbitrary long argument list is supported too. Max 
 * length for a log string is defined to BUFSIZ, whose value depends on the 
 * system but typically is 4/8KB.
 */
int  skygw_log_write(void* writebuf, logfile_id_t id, char* format, ...);
int  skygw_log_write_flush(void* writebuf, logfile_id_t id, char* format, ...);

makefile.inc includes new CFLAG : SS_PROF, which is set if PROF=Y on make command line or in build_gateway.inc .
ss_debug.h includes corresponding ss_prof(exp) macro which equals to exp if SS_PROF is defined and to empty if in other case.

mlist_t now includes datadel function which is a callback and it is executed for mlnode_data on node exit.

utils/skygw_debug.h

@@ -18,6 +18,8 @@
 
 
 #include <assert.h>
+
+#define __USE_UNIX98 1 
 #include <pthread.h>
 #include <unistd.h>
 
@@ -35,6 +37,16 @@
 #define EXTERN_C_FUNC
 #endif
 
+#if defined(SS_DEBUG)
+# define SS_PROF
+#endif
+
+#if defined(SS_DEBUG) || defined(SS_PROF)
+# define ss_prof(exp) exp
+#else
+# define ss_prof(exp)
+#endif /* SS_DEBUG || SS_PROF */
+
 #if defined(SS_DEBUG)
 # define ss_debug(exp) exp
 # define ss_dfprintf fprintf
@@ -288,4 +300,10 @@ typedef enum skygw_chk_t {
         f->sf_chk_tail == CHK_NUM_FILE,                                 \
                         "File struct under- or overflow");              \
     }
+
+#define CHK_WRITEBUF(w) {                                \
+    ss_info_dassert(w->wb_chk_top == CHK_NUM_WRITEBUF,  \
+                    "Writebuf under- or overflow");      \
+    }
+    
 #endif /* SKYGW_DEBUG_H */