Address comments on names and comments

1 files changed, 82 insertions, 0 deletions

diff --git a/src/core/lib/iomgr/cfstream_handle.h b/src/core/lib/iomgr/cfstream_handle.h
new file mode 100644
index 0000000000..f6f7ae54ed
--- /dev/null
+++ b/src/core/lib/iomgr/cfstream_handle.h
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+/* The CFStream handle acts as an event synchronization entity for
+ * read/write/open/error/eos events happening on CFStream streams. */
+
+#ifndef GRPC_CORE_LIB_IOMGR_CFSTREAM_HANDLE_H
+#define GRPC_CORE_LIB_IOMGR_CFSTREAM_HANDLE_H
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_CFSTREAM
+#import <CoreFoundation/CoreFoundation.h>
+
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/lockfree_event.h"
+
+class CFStreamHandle final {
+ public:
+  static CFStreamHandle* CreateStreamSync(CFReadStreamRef read_stream,
+                                          CFWriteStreamRef write_stream);
+  ~CFStreamHandle();
+  CFStreamHandle(const CFReadStreamRef& ref) = delete;
+  CFStreamHandle(CFReadStreamRef&& ref) = delete;
+  CFStreamHandle& operator=(const CFStreamHandle& rhs) = delete;
+
+  void NotifyOnOpen(grpc_closure* closure);
+  void NotifyOnRead(grpc_closure* closure);
+  void NotifyOnWrite(grpc_closure* closure);
+  void Shutdown(grpc_error* error);
+
+  void Ref(const char* file = nullptr, int line = 0,
+           const char* reason = nullptr);
+  void Unref(const char* file = nullptr, int line = 0,
+             const char* reason = nullptr);
+
+ private:
+  CFStreamHandle(CFReadStreamRef read_stream, CFWriteStreamRef write_stream);
+  static void ReadCallback(CFReadStreamRef stream, CFStreamEventType type,
+                           void* client_callback_info);
+  static void WriteCallback(CFWriteStreamRef stream, CFStreamEventType type,
+                            void* client_callback_info);
+  static void* Retain(void* info);
+  static void Release(void* info);
+
+  grpc_core::LockfreeEvent open_event_;
+  grpc_core::LockfreeEvent read_event_;
+  grpc_core::LockfreeEvent write_event_;
+
+  gpr_refcount refcount_;
+};
+
+#ifndef NDEBUG
+#define CFSTREAM_SYNC_REF(sync, reason) \
+  (sync)->Ref(__FILE__, __LINE__, (reason))
+#define CFSTREAM_SYNC_UNREF(sync, reason) \
+  (sync)->Unref(__FILE__, __LINE__, (reason))
+#else
+#define CFSTREAM_SYNC_REF(sync, reason) (sync)->Ref()
+#define CFSTREAM_SYNC_UNREF(sync, reason) (sync)->Unref()
+#endif
+
+#endif
+
+#endif /* GRPC_CORE_LIB_IOMGR_CFSTREAM_HANDLE_H */