Add pool stats

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/sqlclient/trunk@37961 72102866-910b-0410-8b05-ffd578937521

SQLClient.h

@@ -1414,6 +1414,12 @@ SQLCLIENT_PRIVATE
   int                   min;    /** Minimum connection count */
   NSTimeInterval	_duration;      /** Duration logging threshold */
   unsigned int		_debugging;	/** The current debugging level */
+  uint64_t              _immediate;     /** Immediate client provisions */
+  uint64_t              _delayed;       /** Count of delayed provisions */
+  uint64_t              _failed;        /** Count of timed out provisions */
+  NSTimeInterval        _longest;       /** Count of longest delay */
+  NSTimeInterval        _delayWaits;    /** Time waiting for provisions */
+  NSTimeInterval        _failWaits;     /** Time waiting for timewouts */
 }
 
 /**
@@ -1464,6 +1470,10 @@ SQLCLIENT_PRIVATE
  */
 - (void) setDurationLogging: (NSTimeInterval)threshold;
 
+/** Returns a string describing the usage of the pool.
+ */
+- (NSString*) statistics;
+
 /** Puts the client back in the pool.  This happens automatically
  * when a client from a pool would normally be deallocated so you don't
  * generally need to do it.<br />

testPostgres.m

@@ -336,6 +336,8 @@ main()
       NSLog(@"Records - %@", [GSCache class]);
     }
 
+  NSLog(@"Pool stats:\n%@", [sp statistics]);
+
   [pool release];
   return 0;
 }