1/*
2 * Copyright (c) 2002-2005 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;

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35#include "sim/eventq.hh"
36#include "sim/sim_events.hh"
37#include "sim/sim_exit.hh"
38#include "sim/startup.hh"
39#include "sim/stats.hh"
40
41using namespace std;
42
43SimLoopExitEvent::SimLoopExitEvent(const std::string &_cause, int c, Tick r)
44 : Event(Sim_Exit_Pri), cause(_cause), code(c), repeat(r)
45{
46 setFlags(IsExitEvent);
47}
48
49
50//
51// handle termination event
52//
53void
54SimLoopExitEvent::process()
55{
56 // if this got scheduled on a different queue (e.g. the committed
57 // instruction queue) then make a corresponding event on the main
58 // queue.
52 if (queue() != &mainEventQueue) {
59 if (!getFlags(IsMainQueue)) {
60 exitSimLoop(cause, code);
61 delete this;
62 }
63
64 // otherwise do nothing... the IsExitEvent flag takes care of
65 // exiting the simulation loop and returning this object to Python
66
67 // but if you are doing this on intervals, don't forget to make another
68 if (repeat) {
62 schedule(curTick + repeat);
69 assert(getFlags(IsMainQueue));
70 mainEventQueue.schedule(this, curTick + repeat);
71 }
72}
73
74
75const char *
76SimLoopExitEvent::description() const
77{
78 return "simulation loop exit";
79}
80
73SimLoopExitEvent *
74schedExitSimLoop(const std::string &message, Tick when, Tick repeat,
75 EventQueue *q, int exit_code)
76{
77 if (q == NULL)
78 q = &mainEventQueue;
79
80 return new SimLoopExitEvent(q, when, repeat, message, exit_code);
81}
82
81void
82exitSimLoop(const std::string &message, int exit_code)
83{
86 schedExitSimLoop(message, curTick, 0, NULL, exit_code);
84 Event *event = new SimLoopExitEvent(message, exit_code);
85 mainEventQueue.schedule(event, curTick);
86}
87
88CountedDrainEvent::CountedDrainEvent()
89 : SimLoopExitEvent("Finished drain", 0), count(0)
90{ }
91
92void
93CountedDrainEvent::process()
94{
92 if (--count == 0) {
93 exitSimLoop("Finished drain");
94 }
95 if (--count == 0)
96 exitSimLoop(cause, code);
97}
98
99//
100// constructor: automatically schedules at specified time
101//
100CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause,
101 Tick _when, int &_downCounter)
102 : Event(q, Sim_Exit_Pri),
103 cause(_cause),
104 downCounter(_downCounter)
102CountedExitEvent::CountedExitEvent(const std::string &_cause, int &counter)
103 : Event(Sim_Exit_Pri), cause(_cause), downCounter(counter)
104{
105 // catch stupid mistakes
106 assert(downCounter > 0);
108
109 schedule(_when);
107}
108
109
110//
111// handle termination event
112//
113void
114CountedExitEvent::process()

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120
121
122const char *
123CountedExitEvent::description() const
124{
125 return "counted exit";
126}
127
131#ifdef CHECK_SWAP_CYCLES
132new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES);
133#endif
128CheckSwapEvent::CheckSwapEvent(int ival)
129 : interval(ival)
130{
131 mainEventQueue.schedule(this, curTick + interval);
132}
133
134void
135CheckSwapEvent::process()
136{
137 /* Check the amount of free swap space */
138 long swap;
139
140 /* returns free swap in KBytes */
141 swap = procInfo("/proc/meminfo", "SwapFree:");
142
143 if (swap < 1000)
144 ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap);
145
146 if (swap < 100) {
147 cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n";
148 exitSimLoop("Lack of swap space");
149 }
150
152 schedule(curTick + interval);
151 assert(getFlags(IsMainQueue));
152 mainEventQueue.schedule(this, curTick + interval);
153}
154
155const char *
156CheckSwapEvent::description() const
157{
158 return "check swap";
159}