add option for writing a whole block in one go

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/performance/trunk@39039 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,8 @@
+2015-10-07 Richard Frith-Macdonald  <rfm@gnu.org>
+
+	* GSFIFO.m: Add method for writing a whole block of data to a FIFO
+	in one go.
+
 2015-07-29 Richard Frith-Macdonald  <rfm@gnu.org>
 
 	* GSLinkedList.h:

GSFIFO.h

@@ -184,7 +184,7 @@
  * time intervals found boundaries of bands into which to categorise wait
  * time stats.  Any wait whose duration is less than the interval specified
  * in the Nth element is counted in the stat's for the Nth band.
- * If this is nil, a default set of bundaries is used.  If it is an empty
+ * If this is nil, a default set of boundaries 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.  If an instance with the same name
@@ -221,6 +221,16 @@
  */
 - (id) initWithName: (NSString*)n;
 
+/** Writes exactly count items from buf into the FIFO, blocking if
+ * necessary until there is space for the entire write.<br />
+ * Raises an exception if the FIFO is configured with a timeout and it is
+ * exceeded, or if the count is greater than the FIFO size, or if the
+ * FIFO was not configured for multi producer or multi consumer use.<br />
+ * If rtn is YES, the method treats the buffer as containing objects
+ * which are retained as they are added.
+ */
+- (void) putAll: (void**)buf count: (unsigned)count shouldRetain: (BOOL)rtn;
+
 /** 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
@@ -297,14 +307,14 @@
  */
 - (NSObject*) peekObject;
 
-/** Attempts to retain an object while putting it into the FIFO,
+/** Attempts to put an object (or nil) into the FIFO, returning YES
- * returning YES on success or NO if the FIFO is full.<br />
+ * on success or NO if the FIFO is full.<br />
  * Implemented using -put:count:shouldBlock:
  */
 - (BOOL) tryPut: (void*)item;
 
-/** Attempts to put an object (or nil) into the FIFO, returning YES
+/** Attempts to retain an object while putting it into the FIFO,
- * on success or NO if the FIFO is full.<br />
+ * returning YES on success or NO if the FIFO is full.<br />
  * Implemented using -put:count:shouldBlock:
  */
 - (BOOL) tryPutObject: (NSObject*)item;

GSFIFO.m

@@ -361,6 +361,83 @@ stats(NSTimeInterval ti, uint32_t max, NSTimeInterval *bounds, uint64_t *bands)
   return index;
 }
 
+- (void) putAll: (void**)buf count: (unsigned)count shouldRetain: (BOOL)rtn
+{
+  NSTimeInterval	ti;
+  unsigned		index;
+  BOOL			wasEmpty;
+
+  NSAssert(nil != condition, NSGenericException);
+  NSAssert(count <= _capacity, NSInvalidArgumentException);
+
+  [condition lock];
+  if (_head - _tail < count)
+    {
+      if (_head - _tail == _capacity)
+        {
+          _putTryFailure++;
+          fullCount++;
+        }
+
+      START
+      if (0 == timeout)
+	{
+	  while (_head - _tail < count)
+	    {
+	      [condition wait];
+	    }
+	}
+      else
+	{
+	  NSDate	*d;
+
+	  d = [[NSDateClass alloc]
+	    initWithTimeIntervalSinceNow: timeout / 1000.0f];
+	  while (_head - _tail < count)
+	    {
+	      if (NO == [condition waitUntilDate: d])
+		{
+		  [d release];
+		  ENDPUT
+		  [condition broadcast];
+		  [condition unlock];
+		  [NSException raise: NSGenericException
+			      format: @"Timeout waiting for space in FIFO"];
+		}
+	    }
+	  [d release];
+	}
+      ENDPUT
+    }
+  else
+    {
+      _putTrySuccess++;
+    }
+
+  if (_head - _tail == 0)
+    {
+      wasEmpty = YES;
+    }
+  else
+    {
+      wasEmpty = NO;
+    }
+  for (index = 0; index < count; index++)
+    {
+      _items[_head % _capacity] = buf[index];
+      _head++;
+      if (YES == rtn)
+        {
+          RETAIN((NSObject*)buf[index]);
+        }
+    }
+  if (YES == wasEmpty)
+    {
+      [condition broadcast];
+    }
+  [condition unlock];
+}
+
 - (void) dealloc
 {
   [classLock lock];

GSIOThreadPool.m

@@ -279,7 +279,7 @@ best(NSMutableArray *a)
     }
 #else
   [self release];
-  NSLog(@"WARNING, your OSX system is too old to use GSIOthreadPool");
+  NSLog(@"WARNING, your OSX system is too old to use GSIOThreadPool");
   return nil;
 #endif
   return self;