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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
#ifndef INCLUDE_PERFETTO_EXT_IPC_HOST_H_
#define INCLUDE_PERFETTO_EXT_IPC_HOST_H_
#include <memory>
#include "perfetto/ext/base/scoped_file.h"
#include "perfetto/ext/ipc/basic_types.h"
namespace perfetto {
namespace base {
class TaskRunner;
} // namespace base
namespace ipc {
class Service;
// The host-side of the IPC layer. This class acts as a registry and request
// dispatcher. It listen on the UnixSocket |socket_name| for incoming requests
// (coming Client instances) and dispatches their requests to the various
// Services exposed.
class Host {
public:
// Creates an instance and starts listening on the given |socket_name|.
// Returns nullptr if listening on the socket fails.
static std::unique_ptr<Host> CreateInstance(const char* socket_name,
base::TaskRunner*);
// Like the above but takes a file descriptor to a pre-bound unix socket.
// Returns nullptr if listening on the socket fails.
static std::unique_ptr<Host> CreateInstance(base::ScopedFile socket_fd,
base::TaskRunner*);
virtual ~Host();
// Registers a new service and makes it available to remote IPC peers.
// All the exposed Service instances will be destroyed when destroying the
// Host instance if ExposeService succeeds and returns true, or immediately
// after the call in case of failure.
// Returns true if the register has been successfully registered, false in
// case of errors (e.g., another service with the same name is already
// registered).
virtual bool ExposeService(std::unique_ptr<Service>) = 0;
};
} // namespace ipc
} // namespace perfetto
#endif // INCLUDE_PERFETTO_EXT_IPC_HOST_H_
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