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Console Class Reference

#include <console.h>

List of all members.

Public Member Functions

 Console (char *readFile, char *writeFile, VoidFunctionPtr readAvail, VoidFunctionPtr writeDone, int callArg)
 ~Console ()
void PutChar (char ch)
char GetChar ()
void WriteDone ()
void CheckCharAvail ()

Constructor & Destructor Documentation

Console::Console (  char *  readFile,
char *  writeFile,
VoidFunctionPtr  readAvail,
VoidFunctionPtr  writeDone,
int  callArg
) 
 

Definition at line 39 of file console.cc.

References ConsoleReadInt, ConsoleTime, FALSE, interrupt, OpenForReadWrite(), OpenForWrite(), Interrupt::Schedule(), TRUE, and VoidFunctionPtr.

00041 {
00042     if (readFile == NULL)
00043         readFileNo = 0;                                 // keyboard = stdin
00044     else
00045         readFileNo = OpenForReadWrite(readFile, TRUE);  // should be read-only
00046     if (writeFile == NULL)
00047         writeFileNo = 1;                                // display = stdout
00048     else
00049         writeFileNo = OpenForWrite(writeFile);
00050 
00051     // set up the stuff to emulate asynchronous interrupts
00052     writeHandler = writeDone;
00053     readHandler = readAvail;
00054     handlerArg = callArg;
00055     putBusy = FALSE;
00056     incoming = EOF;
00057 
00058     // start polling for incoming packets
00059     interrupt->Schedule(ConsoleReadPoll, (int)this, ConsoleTime, ConsoleReadInt);
00060 }

Console::~Console (   ) 
 

Definition at line 67 of file console.cc.

References Close().

00068 {
00069     if (readFileNo != 0)
00070         Close(readFileNo);
00071     if (writeFileNo != 1)
00072         Close(writeFileNo);
00073 }

Member Function Documentation

void Console::CheckCharAvail (   ) 
 

Definition at line 87 of file console.cc.

References ConsoleReadInt, ConsoleTime, interrupt, Statistics::numConsoleCharsRead, PollFile(), Read(), Interrupt::Schedule(), and stats.

00088 {
00089     char c;
00090 
00091     // schedule the next time to poll for a packet
00092     interrupt->Schedule(ConsoleReadPoll, (int)this, ConsoleTime, 
00093                         ConsoleReadInt);
00094 
00095     // do nothing if character is already buffered, or none to be read
00096     if ((incoming != EOF) || !PollFile(readFileNo))
00097         return;   
00098 
00099     // otherwise, read character and tell user about it
00100     Read(readFileNo, &c, sizeof(char));
00101     incoming = c ;
00102     stats->numConsoleCharsRead++;
00103     (*readHandler)(handlerArg); 
00104 }

char Console::GetChar (   ) 
 

Definition at line 128 of file console.cc.

00129 {
00130    char ch = incoming;
00131 
00132    incoming = EOF;
00133    return ch;
00134 }

void Console::PutChar (  char  ch  ) 
 

Definition at line 143 of file console.cc.

References ASSERT, ConsoleTime, ConsoleWriteInt, FALSE, interrupt, Interrupt::Schedule(), TRUE, and WriteFile().

00144 {
00145     ASSERT(putBusy == FALSE);
00146     WriteFile(writeFileNo, &ch, sizeof(char));
00147     putBusy = TRUE;
00148     interrupt->Schedule(ConsoleWriteDone, (int)this, ConsoleTime,
00149                                         ConsoleWriteInt);
00150 }

void Console::WriteDone (   ) 
 

Definition at line 114 of file console.cc.

References FALSE, Statistics::numConsoleCharsWritten, and stats.

00115 {
00116     putBusy = FALSE;
00117     stats->numConsoleCharsWritten++;
00118     (*writeHandler)(handlerArg);
00119 }

The documentation for this class was generated from the following files:
Generated on Thu Sep 16 12:33:48 2004 for NachOS by doxygen 1.3.8