pollevent.hh revision 2665
12SN/A/* 21762SN/A * Copyright (c) 2002-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 292SN/A */ 302SN/A 312SN/A#ifndef __POLLEVENT_H__ 322SN/A#define __POLLEVENT_H__ 332SN/A 342SN/A#include <vector> 352SN/A#include <poll.h> 361696SN/A#include "sim/root.hh" 372SN/A 38252SN/Aclass Checkpoint; 391872SN/Aclass PollQueue; 40252SN/A 412SN/Aclass PollEvent 422SN/A{ 432SN/A private: 442SN/A friend class PollQueue; 452SN/A 462SN/A protected: 472SN/A pollfd pfd; 482SN/A PollQueue *queue; 492SN/A bool enabled; 502SN/A 512SN/A public: 522SN/A PollEvent(int fd, int event); 532SN/A virtual ~PollEvent(); 542SN/A 552SN/A void disable(); 562SN/A void enable(); 572SN/A virtual void process(int revent) = 0; 58251SN/A 59251SN/A bool queued() { return queue != 0; } 60252SN/A 61252SN/A virtual void serialize(std::ostream &os); 62252SN/A virtual void unserialize(Checkpoint *cp, const std::string §ion); 632SN/A}; 642SN/A 652SN/Aclass PollQueue 662SN/A{ 672SN/A private: 682SN/A typedef std::vector<PollEvent *> eventvec_t; 692SN/A eventvec_t events; 702SN/A 712SN/A pollfd *poll_fds; 722SN/A int max_size; 732SN/A int num_fds; 742SN/A 752SN/A public: 762SN/A PollQueue(); 772SN/A ~PollQueue(); 782SN/A 792SN/A void copy(); 802SN/A void remove(PollEvent *event); 812SN/A void schedule(PollEvent *event); 822SN/A void service(); 832SN/A 842SN/A protected: 852SN/A static bool handler; 862SN/A static struct sigaction oldio; 872SN/A static struct sigaction oldalrm; 882SN/A 892SN/A public: 902SN/A static void setupAsyncIO(int fd, bool set); 912SN/A static void handleIO(int); 922SN/A static void handleALRM(int); 932SN/A static void removeHandler(); 942SN/A static void setupHandler(); 952SN/A}; 962SN/A 972SN/Aextern PollQueue pollQueue; 982SN/A 992SN/A#endif // __POLLEVENT_H__ 100