[Author: dmaclach]

Add a blocks API to NSThread.

R=thomasvl,grobbins
DELTA=238  (236 added, 1 deleted, 1 changed)

1 files changed, 51 insertions, 0 deletions

diff --git a/Foundation/GTMNSThread+Blocks.m b/Foundation/GTMNSThread+Blocks.m
new file mode 100644
index 0000000..a752ea7
--- /dev/null
+++ b/Foundation/GTMNSThread+Blocks.m
@@ -0,0 +1,51 @@
+//
+//  GTMNSThread+Blocks.m
+//
+//  Copyright 2012 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations
+//  under the License.
+//
+
+#import "GTMNSThread+Blocks.h"
+
+#if NS_BLOCKS_AVAILABLE
+
+@implementation NSThread (GTMBlocksAdditions)
+
++ (void)gtm_runBlockOnCurrentThread:(void (^)())block {
+  block();
+}
+
+- (void)gtm_performBlock:(void (^)())block {
+  if ([[NSThread currentThread] isEqual:self]) {
+    block();
+  } else {
+    [self gtm_performWaitingUntilDone:NO block:block];
+  }
+}
+
+- (void)gtm_performWaitingUntilDone:(BOOL)wait block:(void (^)())block {
+  [NSThread performSelector:@selector(gtm_runBlockOnCurrentThread:)
+                   onThread:self
+                 withObject:[[block copy] autorelease]
+              waitUntilDone:wait];
+}
+
++ (void)gtm_performBlockInBackground:(void (^)())block {
+  [NSThread performSelectorInBackground:@selector(gtm_runBlockOnCurrentThread:)
+                             withObject:[[block copy] autorelease]];
+}
+
+@end
+
+#endif  // NS_BLOCKS_AVAILABLE