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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/iomgr/closure.h"
#include "src/core/lib/iomgr/lockfree_event.h"
class CFStreamHandle final {
public:
static CFStreamHandle* CreateStreamHandle(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 = "", 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_;
};
#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 */
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