/usr/include/qpid/sys/Poller.h is in libqpidcommon2-dev 0.16-7ubuntu5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | #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 "qpid/sys/Time.h"
#include "qpid/sys/Runnable.h"
#include "qpid/CommonImportExport.h"
#include <boost/shared_ptr.hpp>
namespace qpid {
namespace sys {
/**
* Poller is an abstract base class that registers callbacks to be
* called when there is IO activity. Concrete derived classes
* implement polling APIs such as epoll or equivalents on other
* operating systems.
*
* On the broker, Connection::received() is called with incoming
* frames from clients, and Connection::doOutput() is called when a
* connection is writeable.
*
* @see DispatchHandler for more details of normal use.
*/
class PollerHandle;
class PollerPrivate;
class Poller : public Runnable {
PollerPrivate* const impl;
public:
typedef boost::shared_ptr<Poller> shared_ptr;
enum Direction {
NONE = 0,
INPUT,
OUTPUT,
INOUT
};
enum EventType {
INVALID = 0,
READABLE,
WRITABLE,
READ_WRITABLE,
DISCONNECTED,
SHUTDOWN,
TIMEOUT,
INTERRUPTED
};
struct Event {
PollerHandle* handle;
EventType type;
Event(PollerHandle* handle0, EventType type0) :
handle(handle0),
type(type0) {
}
void process();
};
QPID_COMMON_EXTERN Poller();
QPID_COMMON_EXTERN ~Poller();
/** Note: this function is async-signal safe */
QPID_COMMON_EXTERN void shutdown();
// Interrupt waiting for a specific poller handle
// returns true if we could interrupt the handle
// - in this case on return the handle is no longer being monitored,
// but we will receive an event from some invocation of poller::wait
// with the handle and the INTERRUPTED event type
// if it returns false then the handle is not being monitored by the poller
// - This can either be because it has just received an event which has been
// reported and has not been reenabled since.
// - Because it was removed from the monitoring set
// - Or because it is already being interrupted
QPID_COMMON_EXTERN bool interrupt(PollerHandle& handle);
// Poller run loop
QPID_COMMON_EXTERN void run();
QPID_COMMON_EXTERN void registerHandle(PollerHandle& handle);
QPID_COMMON_EXTERN void unregisterHandle(PollerHandle& handle);
QPID_COMMON_EXTERN void monitorHandle(PollerHandle& handle, Direction dir);
QPID_COMMON_EXTERN void unmonitorHandle(PollerHandle& handle, Direction dir);
QPID_COMMON_EXTERN Event wait(Duration timeout = TIME_INFINITE);
QPID_COMMON_EXTERN bool hasShutdown();
};
/**
* Handle class to use for polling
*/
class IOHandle;
class PollerHandlePrivate;
class PollerHandle {
friend class Poller;
friend class PollerPrivate;
friend struct Poller::Event;
PollerHandlePrivate* const impl;
QPID_COMMON_INLINE_EXTERN virtual void processEvent(Poller::EventType) {};
public:
QPID_COMMON_EXTERN PollerHandle(const IOHandle& h);
QPID_COMMON_EXTERN virtual ~PollerHandle();
};
inline void Poller::Event::process() {
handle->processEvent(type);
}
}}
#endif // _sys_Poller_h
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