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Diffstat (limited to 'qpid/cpp/src/qpid/sys/Poller.h')
-rw-r--r-- | qpid/cpp/src/qpid/sys/Poller.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/Poller.h b/qpid/cpp/src/qpid/sys/Poller.h new file mode 100644 index 0000000000..0d6b4f9308 --- /dev/null +++ b/qpid/cpp/src/qpid/sys/Poller.h @@ -0,0 +1,110 @@ +#ifndef _sys_Poller_h +#define _sys_Poller_h + +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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. + * + */ + +#include "Time.h" +#include "Socket.h" + +#include <stdint.h> + +#include <boost/shared_ptr.hpp> + +namespace qpid { +namespace sys { + +/** + * Handle class to use for polling + */ +class Poller; +class PollerHandlePrivate; +class PollerHandle { + friend class Poller; + + PollerHandlePrivate* const impl; + const Socket& socket; + +public: + PollerHandle(const Socket& s); + + // Usual way to delete (will defer deletion until we + // can't be returned from a Poller::wait any more) + void deferDelete(); + + // Class clients shouldn't ever use this + virtual ~PollerHandle(); + + const Socket& getSocket() const {return socket;} +}; + +/** + * Poller: abstract class to encapsulate a file descriptor poll to be used + * by a reactor + */ +class PollerPrivate; +class Poller { + PollerPrivate* const impl; + +public: + typedef boost::shared_ptr<Poller> shared_ptr; + + enum Direction { + NONE = 0, + IN, + OUT, + INOUT + }; + + enum EventType { + INVALID = 0, + READABLE, + WRITABLE, + READ_WRITABLE, + DISCONNECTED, + SHUTDOWN, + TIMEOUT + }; + + struct Event { + PollerHandle* handle; + EventType type; + + Event(PollerHandle* handle0, EventType type0) : + handle(handle0), + type(type0) { + } + }; + + Poller(); + ~Poller(); + /** Note: this function is async-signal safe */ + void shutdown(); + + void addFd(PollerHandle& handle, Direction dir); + void delFd(PollerHandle& handle); + void modFd(PollerHandle& handle, Direction dir); + void rearmFd(PollerHandle& handle); + Event wait(Duration timeout = TIME_INFINITE); +}; + +}} +#endif // _sys_Poller_h |