Initial checkin of gRPC to third_party/

third_party/grpc/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h

Index: third_party/grpc/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
diff --git a/third_party/tcmalloc/chromium/src/base/linuxthreads.h b/third_party/grpc/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
similarity index 70%
copy from third_party/tcmalloc/chromium/src/base/linuxthreads.h
copy to third_party/grpc/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
index 5c318fed7ec4c47e7bf082e315992e102abcd620..62c27dbc7f3192ec0ce32a07fed428727b622530 100644
--- a/third_party/tcmalloc/chromium/src/base/linuxthreads.h
+++ b/third_party/grpc/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
@@ -1,4 +1,6 @@
-/* Copyright (c) 2005-2007, Google Inc.
+/*
+ *
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,27 +29,19 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * ---
- * Author: Markus Gutschke
  */
 
-#ifndef _LINUXTHREADS_H
-#define _LINUXTHREADS_H
-
-/* Include thread_lister.h to get the interface that we implement for linux.
- */
+#import <Foundation/Foundation.h>
 
-/* We currently only support x86-32 and x86-64 on Linux. Porting to other
- * related platforms should not be difficult.
+/**
+ * This is a bridge to interact through NSEnumerator's interface with objects that only conform to
+ * NSFastEnumeration. (There's nothing specifically fast about it - you certainly don't win any
+ * speed by using this instead of a NSEnumerator provided by your container).
  */
-#if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) || \
-     defined(__mips__) || defined(__PPC__)) && defined(__linux)
-
-/* Define the THREADS symbol to make sure that there is exactly one core dumper
- * built into the library.
+@interface GRXNSFastEnumerator : NSEnumerator
+/**
+ * After the iteration of the container (via the NSFastEnumeration protocol) is over, the container
+ * is released. If the container is modified during enumeration, an exception is thrown.
  */
-#define THREADS "Linux /proc"
-
-#endif
-
-#endif  /* _LINUXTHREADS_H */
+- (instancetype)initWithContainer:(id<NSFastEnumeration>)container;
+@end