improve configurability

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/performance/trunk@34057 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,11 @@
+2011-10-25 Richard Frith-Macdonald  <rfm@gnu.org>
+
+	* GSFIFO.h:
+	* GSFIFO.m:
+	Add new method to create a named FIFO and configure it from the
+	defaults system.
+	* GNUmakefile: bump version to 0.3.2
+
 2011-08-29 Richard Frith-Macdonald  <rfm@gnu.org>
 
 	* GSCache.m: Try to fool clang/llvm to avoid useless warning/error.

GNUmakefile

@@ -21,7 +21,7 @@ include $(GNUSTEP_MAKEFILES)/common.make
 -include config.make
 
 PACKAGE_NAME = Performance
-PACKAGE_VERSION = 0.3.1
+PACKAGE_VERSION = 0.3.2
 Performance_INTERFACE_VERSION=0.3
 SVN_BASE_URL = svn+ssh://svn.gna.org/svn/gnustep/libs
 SVN_MODULE_NAME = performance

GSFIFO.h

@@ -57,6 +57,9 @@
  * cases it may make sense to have multiple consumers and/or producers.
  * In these cases, some locking is required and the use of the inline
  * functions is not allowed (you must call the -get and -put: methods.<br />
+ * It is recommended that you create FIFOs using the -initWithName: method
+ * so that you can easily use the NSUserDefaults system to adjust their
+ * configurations to tests/tweak performance.
  */
 @interface	GSFIFO : NSObject
 {
@@ -119,6 +122,8 @@
 
 /** <init/>
  * Initialises the receiver with the specified capacity (buffer size).<br />
+ * The capacity must lie in the range from one to a million, othewrwise
+ * the receiver is deallocated and this method returns nil.<br />
  * If the granularity value is non-zero, it is treated as the maximum time
  * in milliseconds for which a -get or -put: operation will pause between
  * successive attempts.<br />
@@ -134,7 +139,8 @@
  * If this is nil, a default set of bundaries is used.  If it is an empty
  * array then no time based stats are recorded.<br />
  * The name string is a unique identifier for the receiver and is used when
- * printing diagnostics and statistics.
+ * printing diagnostics and statistics.  If an instance with the same name
+ * already exists, the receiveris deallocated and an exception is raised.
  */
 - (id) initWithCapacity: (uint32_t)c
 	    granularity: (uint16_t)g
@@ -145,11 +151,26 @@
 		   name: (NSString*)n;
 
 /** Initialises the receiver as a multi-producer, multi-consumer FIFO with
- * no timeout and with default stats gathering enabled.
+ * no timeout and with default stats gathering enabled.<br />
+ * However, these values (including the supplied capacity) may be overridden
+ * as specified in -initWithName:
  */
 - (id) initWithCapacity: (uint32_t)c
 		   name: (NSString*)n;
 
+/** Initialises the receiver using the specified name and obtaining other
+ * details from the NSUserDefaults system using defaults keys where 'NNN'
+ * is the supplied name.<br />
+ * The GSFIFOCapacityNNN default specifies the capacity for the FIFO, and
+ * if missing a capacity of 1000 is assumed.<br />
+ * The GSFIFOGranularityNNN integer is zero by default.<br />
+ * The GSFIFOTimeoutNNN integer is zero by default.<br />
+ * The GSFIFOSingleConsumerNNN boolean is NO by default.<br />
+ * The GSFIFOSingleProducerNNN boolean is NO by default.<br />
+ * The GSFIFOBoundariesNNN array is missing by default.<br />
+ */
+- (id) initWithName: (NSString*)n;
+
 /** Writes up to count items from buf into the FIFO.
  * If block is YES, this blocks if necessary until at least one item
  * can be written, and raises an exception if the FIFO is configured

GSFIFO.m

@@ -27,6 +27,7 @@
 #import <Foundation/NSMapTable.h>
 #import <Foundation/NSString.h>
 #import <Foundation/NSThread.h>
+#import <Foundation/NSUserDefaults.h>
 #import <Foundation/NSValue.h>
 #import <Foundation/NSZone.h>
 
@@ -407,7 +408,7 @@ stats(NSTimeInterval ti, uint32_t max, NSTimeInterval *bounds, uint64_t *bands)
 	     boundaries: (NSArray*)a
 		   name: (NSString*)n
 {
-  if (c < 1)
+  if (c < 1 || c > 1000000)
     {
       [self release];
       return nil;
@@ -480,15 +481,44 @@ stats(NSTimeInterval ti, uint32_t max, NSTimeInterval *bounds, uint64_t *bands)
 - (id) initWithCapacity: (uint32_t)c
 		   name: (NSString*)n
 {
+  NSUserDefaults	*defs = [NSUserDefaults standardUserDefaults];
+  NSString		*key;
+  uint16_t		g;
+  uint16_t		t;
+  BOOL			mc;
+  BOOL			mp;
+  NSArray		*b;
+
+  key = [NSString stringWithFormat: @"GSFIFOCapacity%@", n];
+  if ([defs integerForKey: key] > 0)
+    {
+      c = [defs integerForKey: key];
+    }
+  key = [NSString stringWithFormat: @"GSFIFOGranularity%@", n];
+  g = [defs integerForKey: key];
+  key = [NSString stringWithFormat: @"GSFIFOTimeout%@", n];
+  t = [defs integerForKey: key];
+  key = [NSString stringWithFormat: @"GSFIFOSingleConsumer%@", n];
+  mc = (YES == [defs boolForKey: key]) ? NO : YES;
+  key = [NSString stringWithFormat: @"GSFIFOSingleProducer%@", n];
+  mp = (YES == [defs boolForKey: key]) ? NO : YES;
+  key = [NSString stringWithFormat: @"GSFIFOBoundaries%@", n];
+  b = [defs arrayForKey: key];
+
   return [self initWithCapacity: c
-		    granularity: 0
-			timeout: 0
-		  multiProducer: YES
-		  multiConsumer: YES
-		     boundaries: nil
+		    granularity: g
+			timeout: t
+		  multiProducer: mp
+		  multiConsumer: mc
+		     boundaries: b
 			   name: n];
 }
 
+- (id) initWithName: (NSString*)n
+{
+  return [self initWithCapacity: 10000 name: n];
+}
+
 - (unsigned) put: (void**)buf count: (unsigned)count shouldBlock: (BOOL)block
 {
   NSTimeInterval	sum;