Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / iomgr / cfstream_handle.h

diff --git a/legacy-libs/grpc/deps/grpc/src/core/lib/iomgr/cfstream_handle.h b/legacy-libs/grpc/deps/grpc/src/core/lib/iomgr/cfstream_handle.h
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+/*
+ *
+ * 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/gprpp/memory.h"
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/lockfree_event.h"
+
+class GrpcLibraryInitHolder {
+ public:
+  GrpcLibraryInitHolder();
+  virtual ~GrpcLibraryInitHolder();
+};
+
+class CFStreamHandle : public GrpcLibraryInitHolder {
+ public:
+  static CFStreamHandle* CreateStreamHandle(CFReadStreamRef read_stream,
+                                            CFWriteStreamRef write_stream);
+  ~CFStreamHandle() override;
+  CFStreamHandle(const CFStreamHandle& ref) = delete;
+  CFStreamHandle(CFStreamHandle&& 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 = "", int line = 0, const char* reason = nullptr);
+  void Unref(const char* file = "", 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_;
+
+  dispatch_queue_t dispatch_queue_;
+
+  gpr_refcount refcount_;
+
+  GRPC_ALLOW_CLASS_TO_USE_NON_PUBLIC_NEW
+  GRPC_ALLOW_CLASS_TO_USE_NON_PUBLIC_DELETE
+};
+
+#ifdef DEBUG
+#define CFSTREAM_HANDLE_REF(handle, reason) \
+  (handle)->Ref(__FILE__, __LINE__, (reason))
+#define CFSTREAM_HANDLE_UNREF(handle, reason) \
+  (handle)->Unref(__FILE__, __LINE__, (reason))
+#else
+#define CFSTREAM_HANDLE_REF(handle, reason) (handle)->Ref()
+#define CFSTREAM_HANDLE_UNREF(handle, reason) (handle)->Unref()
+#endif
+
+#endif
+
+#endif /* GRPC_CORE_LIB_IOMGR_CFSTREAM_HANDLE_H */