async.hh revision 2632:1bb2f91485ea 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
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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
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27 */
28
29#ifndef __ASYNC_HH__
30#define __ASYNC_HH__
31
32///
33/// @file sim/async.hh
34/// This file defines flags used to handle asynchronous simulator events.
35///
36
37/// @name Asynchronous event flags.
38/// To avoid races, signal handlers simply set these flags, which are
39/// then checked in the main event loop.  Defined in main.cc.
40/// @note See the PollQueue object (in pollevent.hh) for the use of async_io and async_alarm.
41//@{
42extern volatile bool async_event;	///< Some asynchronous event has happened.
43extern volatile bool async_dump;	///< Async request to dump stats.
44extern volatile bool async_exit;	///< Async request to exit simulator.
45extern volatile bool async_io;		///< Async I/O request (SIGIO).
46extern volatile bool async_alarm;	///< Async alarm event (SIGALRM).
47//@}
48
49#endif // __ASYNC_HH__
50