Initial checkin of gRPC to third_party/

third_party/grpc/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h

Index: third_party/grpc/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
diff --git a/third_party/tcmalloc/chromium/src/base/linuxthreads.h b/third_party/grpc/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
similarity index 61%
copy from third_party/tcmalloc/chromium/src/base/linuxthreads.h
copy to third_party/grpc/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
index 5c318fed7ec4c47e7bf082e315992e102abcd620..7b66cd4c32902fa43e1d2b1c9cd6574a429376d0 100644
--- a/third_party/tcmalloc/chromium/src/base/linuxthreads.h
+++ b/third_party/grpc/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
@@ -1,4 +1,6 @@
-/* Copyright (c) 2005-2007, Google Inc.
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,27 +29,26 @@
  * (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>
+#include <grpc/grpc.h>
 
-/* We currently only support x86-32 and x86-64 on Linux. Porting to other
- * related platforms should not be difficult.
- */
-#if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) || \
-     defined(__mips__) || defined(__PPC__)) && defined(__linux)
+typedef void(^GRPCQueueCompletionHandler)(bool success);
 
-/* Define the THREADS symbol to make sure that there is exactly one core dumper
- * built into the library.
+/**
+ * This class lets one more easily use |grpc_completion_queue|. To use it, pass the value of the
+ * |unmanagedQueue| property of an instance of this class to |grpc_channel_create_call|. Then for
+ * every |grpc_call_*| method that accepts a tag, you can pass a block of type
+ * |GRPCQueueCompletionHandler| (remembering to cast it using |__bridge_retained|). The block is
+ * guaranteed to eventually be called, by a concurrent queue, and then released. Each such block is
+ * passed a |bool| that tells if the operation was successful.
+ *
+ * Release the GRPCCompletionQueue object only after you are not going to pass any more blocks to
+ * the |grpc_call| that's using it.
  */
-#define THREADS "Linux /proc"
-
-#endif
+@interface GRPCCompletionQueue : NSObject
+@property(nonatomic, readonly) grpc_completion_queue *unmanagedQueue;
 
-#endif  /* _LINUXTHREADS_H */
++ (instancetype)completionQueue;
+@end