system.cc File Reference

#include "copyright.h"
#include "system.h"
#include <sys/time.h>
#include <stdio.h>
#include <signal.h>
#include <pthread.h>
#include <unistd.h>

Go to the source code of this file.

Functions
void	Cleanup ()
void	Initialize (int argc, char **argv)
Variables
Thread *	currentThread
Thread *	threadToBeDestroyed
Scheduler *	scheduler
Interrupt *	interrupt
Statistics *	stats
Timer *	timer
long	timerCount = 0
long	secCount = 0
int	tready

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Function Documentation

void Cleanup (   )

Definition at line 187 of file system.cc. References Exit(), interrupt, scheduler, timer, and timer_id. Referenced by Interrupt::Halt(), and Initialize(). { extern timer_t timer_id; //ualarm(0, 0); // switch off the timer timer_delete(timer_id); printf("\nCleaning up...\n"); #ifdef NETWORK delete postOffice; #endif #ifdef USER_PROGRAM delete machine; #endif #ifdef FILESYS_NEEDED delete fileSystem; #endif #ifdef FILESYS delete synchDisk; #endif delete timer; delete scheduler; delete interrupt; Exit(0); }

void Initialize (  int  argc, char **  argv )

Definition at line 90 of file system.cc. References ASSERT, CallOnUserAbort(), Cleanup(), DebugInit(), Interrupt::Enable(), FALSE, interrupt, RandomInit(), scheduler, stats, threadToBeDestroyed, timer, and TRUE. Referenced by main(). { int argCount; char *debugArgs = ""; bool randomYield = FALSE; #ifdef USER_PROGRAM bool debugUserProg = FALSE; // single step user program #endif #ifdef FILESYS_NEEDED bool format = FALSE; // format disk #endif #ifdef NETWORK double rely = 1; // network reliability int netname = 0; // UNIX socket name #endif for (argc--, argv++; argc > 0; argc -= argCount, argv += argCount) { argCount = 1; if (!strcmp(*argv, "-d")) { if (argc == 1) debugArgs = "+"; // turn on all debug flags else { debugArgs = *(argv + 1); argCount = 2; } } else if (!strcmp(*argv, "-rs")) { ASSERT(argc > 1); RandomInit(atoi(*(argv + 1))); // initialize pseudo-random // number generator randomYield = TRUE; argCount = 2; } #ifdef USER_PROGRAM if (!strcmp(*argv, "-s")) debugUserProg = TRUE; #endif #ifdef FILESYS_NEEDED if (!strcmp(*argv, "-f")) format = TRUE; #endif #ifdef NETWORK if (!strcmp(*argv, "-l")) { ASSERT(argc > 1); rely = atof(*(argv + 1)); argCount = 2; } else if (!strcmp(*argv, "-m")) { ASSERT(argc > 1); netname = atoi(*(argv + 1)); argCount = 2; } #endif } DebugInit(debugArgs); // initialize DEBUG messages stats = new Statistics(); // collect statistics interrupt = new Interrupt; // start up interrupt handling scheduler = new Scheduler(); // initialize the ready queue //if (randomYield) // start the timer (if needed) //timer = new Timer(TimerInterruptHandler, 0, randomYield); timer = 0; threadToBeDestroyed = NULL; // We didn't explicitly allocate the current thread we are running in. // But if it ever tries to give up the CPU, we better have a Thread // object to save its state. //currentThread = new Thread("main"); //currentThread->setStatus(RUNNING); interrupt->Enable(); CallOnUserAbort(Cleanup); // if user hits ctl-C #ifdef USER_PROGRAM machine = new Machine(debugUserProg); // this must come first #endif #ifdef FILESYS synchDisk = new SynchDisk("DISK"); #endif #ifdef FILESYS_NEEDED fileSystem = new FileSystem(format); #endif #ifdef NETWORK postOffice = new PostOffice(netname, rely, 10); #endif }

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Variable Documentation

Thread* currentThread

Definition at line 19 of file system.cc. Referenced by Thread::Finish(), main(), Interrupt::OneTick(), Semaphore::P(), Machine::Run(), schedule(), Thread::Sleep(), Thread::Suspend(), Scheduler::timerIntH(), Thread::Yield(), and Thread::~Thread().

Interrupt* interrupt

Definition at line 22 of file system.cc. Referenced by Console::CheckCharAvail(), Network::CheckPktAvail(), Cleanup(), Console::Console(), Machine::Debugger(), Thread::Finish(), Thread::Fork(), Initialize(), main(), Network::Network(), Semaphore::P(), PollFile(), Console::PutChar(), Machine::RaiseException(), Disk::ReadRequest(), Machine::Run(), schedule(), Network::Send(), Thread::Sleep(), Thread::Suspend(), Timer::Timer(), Timer::TimerExpired(), Scheduler::timerIntH(), Thread::UnSleep(), Semaphore::V(), Disk::WriteRequest(), and Thread::Yield().

Scheduler* scheduler

Definition at line 21 of file system.cc. Referenced by Cleanup(), Thread::Fork(), Initialize(), main(), schedule(), Thread::Suspend(), Scheduler::timerIntH(), and Semaphore::V().

long secCount = 0

Definition at line 29 of file system.cc. Referenced by Statistics::Print(), and Scheduler::timerIntH().

Statistics* stats

Definition at line 23 of file system.cc. Referenced by Console::CheckCharAvail(), Network::CheckPktAvail(), Disk::ComputeLatency(), Machine::Debugger(), Interrupt::DumpState(), Interrupt::Halt(), Initialize(), Interrupt::OneTick(), Disk::ReadRequest(), Machine::Run(), Interrupt::Schedule(), Network::SendDone(), Console::WriteDone(), and Disk::WriteRequest().

Thread* threadToBeDestroyed

Definition at line 20 of file system.cc. Referenced by Thread::Finish(), Initialize(), and schedule().

Timer* timer

Definition at line 24 of file system.cc. Referenced by Cleanup(), and Initialize().

long timerCount = 0

Definition at line 28 of file system.cc. Referenced by Statistics::Print(), and Scheduler::timerIntH().

int tready

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