96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __POLLEVENT_H__
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#define __POLLEVENT_H__
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#include <vector>
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#include <poll.h>
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#include "sim/universe.hh"
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class Checkpoint;
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class PollEvent
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{
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private:
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friend class PollQueue;
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protected:
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pollfd pfd;
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PollQueue *queue;
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bool enabled;
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public:
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PollEvent(int fd, int event);
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virtual ~PollEvent();
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void disable();
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void enable();
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virtual void process(int revent) = 0;
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bool queued() { return queue != 0; }
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virtual void serialize(std::ostream &os);
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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class PollQueue
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{
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private:
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typedef std::vector<PollEvent *> eventvec_t;
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eventvec_t events;
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pollfd *poll_fds;
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int max_size;
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int num_fds;
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public:
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PollQueue();
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~PollQueue();
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void copy();
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void remove(PollEvent *event);
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void schedule(PollEvent *event);
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void service();
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protected:
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static bool handler;
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static struct sigaction oldio;
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static struct sigaction oldalrm;
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public:
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static void setupAsyncIO(int fd, bool set);
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static void handleIO(int);
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static void handleALRM(int);
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static void removeHandler();
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static void setupHandler();
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};
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extern PollQueue pollQueue;
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#endif // __POLLEVENT_H__
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