Initial checkin of gRPC to third_party/

third_party/grpc/src/objective-c/RxLibrary/transformations/GRXMappingWriter.m

Index: third_party/grpc/src/objective-c/RxLibrary/transformations/GRXMappingWriter.m
diff --git a/third_party/tcmalloc/vendor/src/base/spinlock_win32-inl.h b/third_party/grpc/src/objective-c/RxLibrary/transformations/GRXMappingWriter.m
similarity index 70%
copy from third_party/tcmalloc/vendor/src/base/spinlock_win32-inl.h
copy to third_party/grpc/src/objective-c/RxLibrary/transformations/GRXMappingWriter.m
index 64decd267240a384c66e4cd556f70df8e8f33b54..f3242e4fa95b4749f7cbfd386341baf9c19823f3 100644
--- a/third_party/tcmalloc/vendor/src/base/spinlock_win32-inl.h
+++ b/third_party/grpc/src/objective-c/RxLibrary/transformations/GRXMappingWriter.m
@@ -1,10 +1,12 @@
-/* Copyright (c) 2009, Google Inc.
+/*
+ *
+ * Copyright 2015, Google Inc.
  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +16,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -27,27 +29,35 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * ---
- * This file is a Win32-specific part of spinlock_internal.cc
  */
 
+#import "GRXMappingWriter.h"
 
-#include <windows.h>
+static id (^kIdentity)(id value) = ^id(id value) {
+  return value;
+};
 
-namespace base {
-namespace internal {
+@interface GRXForwardingWriter () <GRXWriteable>
+@end
 
-void SpinLockDelay(volatile Atomic32 *w, int32 value, int loop) {
-  if (loop == 0) {
-  } else if (loop == 1) {
-    Sleep(0);
-  } else {
-    Sleep(base::internal::SuggestedDelayNS(loop) / 1000000);
-  }
+@implementation GRXMappingWriter {
+  id (^_map)(id value);
 }
 
-void SpinLockWake(volatile Atomic32 *w, bool all) {
+- (instancetype)initWithWriter:(GRXWriter *)writer {
+  return [self initWithWriter:writer map:nil];
 }
 
-} // namespace internal
-} // namespace base
+// Designated initializer
+- (instancetype)initWithWriter:(GRXWriter *)writer map:(id (^)(id value))map {
+  if ((self = [super initWithWriter:writer])) {
+    _map = map ?: kIdentity;
+  }
+  return self;
+}
+
+// Override
+- (void)writeValue:(id)value {
+  [super writeValue:_map(value)];
+}
+@end