sysdep.cc File Reference

#include "copyright.h"
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/un.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include "interrupt.h"
#include "system.h"

Go to the source code of this file.

Functions
bool	PollFile (int fd)
int	OpenForWrite (char *name)
int	OpenForReadWrite (char *name, bool crashOnError)
void	Read (int fd, char *buffer, int nBytes)
int	ReadPartial (int fd, char *buffer, int nBytes)
void	WriteFile (int fd, char *buffer, int nBytes)
void	Lseek (int fd, int offset, int whence)
int	Tell (int fd)
void	Close (int fd)
bool	Unlink (char *name)
int	OpenSocket ()
void	CloseSocket (int sockID)
void	AssignNameToSocket (char *socketName, int sockID)
void	DeAssignNameToSocket (char *socketName)
bool	PollSocket (int sockID)
void	ReadFromSocket (int sockID, char *buffer, int packetSize)
void	SendToSocket (int sockID, char *buffer, int packetSize, char *toName)
void	CallOnUserAbort (VoidNoArgFunctionPtr func)
void	Delay (int seconds)
void	Abort ()
void	Exit (int exitCode)
void	RandomInit (unsigned seed)
int	Random ()
char *	AllocBoundedArray (int size)
void	DeallocBoundedArray (char *ptr, int size)

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Function Documentation

void Abort (   )

Definition at line 417 of file sysdep.cc. { abort(); }

char* AllocBoundedArray (  int  size  )

Definition at line 469 of file sysdep.cc. { int pgSize = getpagesize(); char *ptr = new char[pgSize * 2 + size]; mprotect(ptr, pgSize, 0); mprotect(ptr + pgSize + size, pgSize, 0); return ptr + pgSize; }

void AssignNameToSocket (  char *  socketName, int  sockID )

Definition at line 312 of file sysdep.cc. References ASSERT, and DEBUG(). Referenced by Network::Network(). { struct sockaddr_un uName; int retVal; (void) unlink(socketName); // in case it's still around from last time InitSocketName(&uName, socketName); retVal = bind(sockID, (struct sockaddr *) &uName, sizeof(uName)); ASSERT(retVal >= 0); DEBUG('n', "Created socket %s\n", socketName); }

void CallOnUserAbort (  VoidNoArgFunctionPtr  func  )

Definition at line 393 of file sysdep.cc. References VoidFunctionPtr, and VoidNoArgFunctionPtr. Referenced by Initialize(). { (void)signal(SIGINT, (VoidFunctionPtr) func); }

void Close (  int  fd  )

Definition at line 247 of file sysdep.cc. References ASSERT. Referenced by Console::~Console(), and Disk::~Disk(). { int retVal = close(fd); ASSERT(retVal >= 0); }

void CloseSocket (  int  sockID  )

Definition at line 288 of file sysdep.cc. Referenced by Network::~Network(). { (void) close(sockID); }

void DeallocBoundedArray (  char *  ptr, int  size )

Definition at line 488 of file sysdep.cc. Referenced by Thread::~Thread(). { int pgSize = getpagesize(); mprotect(ptr - pgSize, pgSize, PROT_READ | PROT_WRITE | PROT_EXEC); mprotect(ptr + size, pgSize, PROT_READ | PROT_WRITE | PROT_EXEC); delete [] (ptr - pgSize); }

void DeAssignNameToSocket (  char *  socketName  )

Definition at line 330 of file sysdep.cc. Referenced by Network::~Network(). { (void) unlink(socketName); }

void Delay (  int  seconds  )

Definition at line 406 of file sysdep.cc. Referenced by main(). { (void) sleep((unsigned) seconds); }

void Exit (  int  exitCode  )

Definition at line 428 of file sysdep.cc. Referenced by Cleanup(). { exit(exitCode); }

void Lseek (  int  fd, int  offset, int  whence )

Definition at line 219 of file sysdep.cc. References ASSERT. Referenced by Disk::Disk(), Disk::ReadRequest(), and Disk::WriteRequest(). { int retVal = lseek(fd, offset, whence); ASSERT(retVal >= 0); }

int OpenForReadWrite (  char *  name, bool  crashOnError )

Definition at line 168 of file sysdep.cc. References ASSERT. Referenced by Console::Console(), and Disk::Disk(). { int fd = open(name, O_RDWR, 0); ASSERT(!crashOnError || fd >= 0); return fd; }

int OpenForWrite (  char *  name  )

Definition at line 151 of file sysdep.cc. References ASSERT. Referenced by Console::Console(), and Disk::Disk(). { int fd = open(name, O_RDWR|O_CREAT|O_TRUNC, 0666); ASSERT(fd >= 0); return fd; }

int OpenSocket (   )

Definition at line 272 of file sysdep.cc. References ASSERT. Referenced by Network::Network(). { int sockID; sockID = socket(AF_UNIX, SOCK_DGRAM, 0); ASSERT(sockID >= 0); return sockID; }

bool PollFile (  int  fd  )

Definition at line 117 of file sysdep.cc. References ASSERT, FALSE, Interrupt::getStatus(), IdleMode, interrupt, and TRUE. Referenced by Console::CheckCharAvail(), and PollSocket(). { int rfd = (1 << fd), wfd = 0, xfd = 0, retVal; struct timeval pollTime; // decide how long to wait if there are no characters on the file pollTime.tv_sec = 0; if (interrupt->getStatus() == IdleMode) pollTime.tv_usec = 20000; // delay to let other nachos run else pollTime.tv_usec = 0; // no delay // poll file or socket //#ifdef HOST_i386 retVal = select(32, (fd_set*)&rfd, (fd_set*)&wfd, (fd_set*)&xfd, &pollTime); //#else //retVal = select(32, &rfd, &wfd, &xfd, &pollTime); //#endif ASSERT((retVal == 0) || (retVal == 1)); if (retVal == 0) return FALSE; // no char waiting to be read return TRUE; }

bool PollSocket (  int  sockID  )

Definition at line 341 of file sysdep.cc. References PollFile(). Referenced by Network::CheckPktAvail(). { return PollFile(sockID); // on UNIX, socket ID's are just file ID's }

int Random (   )

Definition at line 451 of file sysdep.cc. Referenced by Network::Send(), and Timer::TimeOfNextInterrupt(). { return rand(); }

void RandomInit (  unsigned  seed  )

Definition at line 440 of file sysdep.cc. Referenced by Initialize(). { srand(seed); }

void Read (  int  fd, char *  buffer, int  nBytes )

Definition at line 182 of file sysdep.cc. References ASSERT. Referenced by Console::CheckCharAvail(), Disk::Disk(), and Disk::ReadRequest(). { int retVal = read(fd, buffer, nBytes); ASSERT(retVal == nBytes); }

void ReadFromSocket (  int  sockID, char *  buffer, int  packetSize )

Definition at line 351 of file sysdep.cc. References ASSERT. Referenced by Network::CheckPktAvail(). { int retVal; //extern int errno; int errno; struct sockaddr_un uName; int size = sizeof(uName); retVal = recvfrom(sockID, buffer, packetSize, 0, (struct sockaddr *) &uName, (socklen_t*)&size); if (retVal != packetSize) { perror("in recvfrom"); printf("called: %x, got back %d, %d\n", buffer, retVal, errno); } ASSERT(retVal == packetSize); }

int ReadPartial (  int  fd, char *  buffer, int  nBytes )

Definition at line 195 of file sysdep.cc. { return read(fd, buffer, nBytes); }

void SendToSocket (  int  sockID, char *  buffer, int  packetSize, char *  toName )

Definition at line 375 of file sysdep.cc. References ASSERT. Referenced by Network::Send(). { struct sockaddr_un uName; int retVal; InitSocketName(&uName, toName); retVal = sendto(sockID, buffer, packetSize, 0, (const sockaddr*)&uName, sizeof(uName)); ASSERT(retVal == packetSize); }

int Tell (  int  fd  )

Definition at line 231 of file sysdep.cc. { #ifdef HOST_i386 return lseek(fd,0,SEEK_CUR); // 386BSD doesn't have the tell() system call #else return tell(fd); #endif }

bool Unlink (  char *  name  )

Definition at line 259 of file sysdep.cc. { return unlink(name); }

void WriteFile (  int  fd, char *  buffer, int  nBytes )

Definition at line 207 of file sysdep.cc. References ASSERT. Referenced by Disk::Disk(), Console::PutChar(), and Disk::WriteRequest(). { int retVal = write(fd, buffer, nBytes); ASSERT(retVal == nBytes); }

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