9c57d5b5a6
The PollEvent class dynamically installs a SIGIO and SIGALRM handler when a file handler is registered. Most signal handlers currently get registered in the initSignals() function. This changeset moves the SIGIO/SIGALRM handlers to initSignals() to live with the other signal handlers. The original code installs SIGIO and SIGALRM with the SA_RESTART option to prevent syscalls from returning EINTR. This changeset consistently uses this flag for all signal handlers to ensure that other signals that trigger asynchronous behavior (e.g., statistics dumping) do not cause undesirable EINTR returns.
93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
/*
|
|
* 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 <poll.h>
|
|
|
|
#include <vector>
|
|
|
|
#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();
|
|
|
|
public:
|
|
static void setupAsyncIO(int fd, bool set);
|
|
};
|
|
|
|
extern PollQueue pollQueue;
|
|
|
|
#endif // __POLLEVENT_H__
|