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Diffstat (limited to 'sim/async.hh')
| -rw-r--r-- | sim/async.hh | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sim/async.hh b/sim/async.hh new file mode 100644 index 000000000..fb0e2ee06 --- /dev/null +++ b/sim/async.hh @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2003 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. + */ + +#ifndef __ASYNC_HH__ +#define __ASYNC_HH__ + +/// +/// @file sim/async.hh +/// This file defines flags used to handle asynchronous simulator events. +/// + +/// @name Asynchronous event flags. +/// To avoid races, signal handlers simply set these flags, which are +/// then checked in the main event loop. Defined in main.cc. +/// @note See the PollQueue object (in pollevent.hh) for the use of async_io and async_alarm. +//@{ +extern volatile bool async_event; ///< Some asynchronous event has happened. +extern volatile bool async_dump; ///< Async request to dump stats. +extern volatile bool async_exit; ///< Async request to exit simulator. +extern volatile bool async_io; ///< Async I/O request (SIGIO). +extern volatile bool async_alarm; ///< Async alarm event (SIGALRM). +//@} + +#endif // __ASYNC_HH__ |