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/*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Nathan Binkert
*/
#ifndef __POLLEVENT_H__
#define __POLLEVENT_H__
#include <vector>
#include <poll.h>
#include "sim/core.hh"
class Checkpoint;
class PollQueue;
class PollEvent
{
private:
friend class PollQueue;
protected:
pollfd pfd;
PollQueue *queue;
bool enabled;
public:
PollEvent(int fd, int event);
virtual ~PollEvent();
void disable();
void enable();
virtual void process(int revent) = 0;
bool queued() { return queue != 0; }
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
};
class PollQueue
{
private:
typedef std::vector<PollEvent *> eventvec_t;
eventvec_t events;
pollfd *poll_fds;
int max_size;
int num_fds;
public:
PollQueue();
~PollQueue();
void copy();
void remove(PollEvent *event);
void schedule(PollEvent *event);
void service();
protected:
static bool handler;
static struct sigaction oldio;
static struct sigaction oldalrm;
public:
static void setupAsyncIO(int fd, bool set);
static void handleIO(int);
static void handleALRM(int);
static void removeHandler();
static void setupHandler();
};
extern PollQueue pollQueue;
#endif // __POLLEVENT_H__
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