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/* $Id$
*
* WakeOn: Tell the scheduler to wake the current process on a signal event.
* (intermediate opcode)
*
* Copyright (C) 2008-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#ifndef __WAKE_ON_HPP_INCLUDED
#define __WAKE_ON_HPP_INCLUDED
#include <cassert>
namespace intermediate {
//! register a signal to the scheduler on which to wake the current process.
/** This class represents the wake_on opcode.
* The currently running process should be made runnable again, if the signal
* registered via WakeOn showed activity.
* Issueing more than one WakeOn statement will add to the schedulers
* internal sensitivity set. The set will only be cleared after the
* process was resumed from a suspend statement.
*
* read operands: src
* write operands: None, implicit sensitivity set of scheduler.
* Operation: sched->addSensitivity(src);
*/
class WakeOn : public OpCode {
public:
//! c'tor
/** @param source pointer to a signal.
*/
WakeOn(
Operand *source
) : src(source) {
assert(source->type == OP_TYPE_POINTER);
}
//! Accept a Visitor.
/** All intermediate code nodes need to implement this method.
*
* @param v the Visitor that can visit this node.
*/
virtual void accept(Visitor& v) {
v.visit(*this);
}
//! source of the instruction
Operand *src;
protected:
virtual ~WakeOn() {
util::MiscUtil::terminate(this->src);
}
};
}; /* namespace intermediate */
#endif /* __WAKE_ON_HPP_INCLUDED */
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