async.hh revision 4073 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#ifndef __ASYNC_HH__
33#define __ASYNC_HH__
34
35///
36/// @file sim/async.hh
37/// This file defines flags used to handle asynchronous simulator events.
38///
39
40/// @name Asynchronous event flags.
41/// To avoid races, signal handlers simply set these flags, which are
42/// then checked in the main event loop.  Defined in main.cc.
43/// @note See the PollQueue object (in pollevent.hh) for the use of async_io and async_alarm.
44//@{
45extern volatile bool async_event;	///< Some asynchronous event has happened.
46extern volatile bool async_dump;	///< Async request to dump stats.
47extern volatile bool async_exit;	///< Async request to exit simulator.
48extern volatile bool async_io;		///< Async I/O request (SIGIO).
49extern volatile bool async_alarm;	///< Async alarm event (SIGALRM).
50extern volatile bool async_exception;   ///< Python exception.
51//@}
52
53#endif // __ASYNC_HH__
54