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fpc/api/inc/apicomm.pas

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{****************************************************************************
$Id$
Common types, and definitions
Copyright (c) 1997 Balazs Scheidler (bazsi@balabit.hu)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
$Id$
****************************************************************************
Changelog:
Common version 0.2.6
Date Version Who Comments
07/12/97 0.1 Bazsi Initial implementation (bazsi)
07/18/97 0.2 Bazsi Linux specific error codes added
07/18/97 0.2.1 Bazsi Some syntactical errors removed...
07/28/97 0.2.2 Bazsi Base error code for Video registered
07/29/97 0.2.3 Bazsi Some basic types added (PByte, PWord etc)
08/08/97 0.2.4 Bazsi Finalized error handling code (Brad's code added)
08/27/97 0.2.5 Bazsi BP doesn't like function types as return-values
for functions, returning Pointer instead
09/06/97 0.2.6 Bazsi Added base error code for Keyboard
11/06/97 0.2.7 Bazsi Added base error code for FileCtrl
Todo:
* Some types found in the DOS unit should be included here (TextRec maybe
renamed to TTextRec, FileRec etc.)
* Other platform specific error codes.
****************************************************************************}
unit ApiComm;
interface
{$i platform.inc}
const
{ Error codes }
errOk = 0;
errVioBase = 1000;
errKbdBase = 1010;
errFileCtrlBase = 1020;
errMouseBase = 1030;
{ The following ranges have been defined for error codes:
0 - 1000 OS dependent codes
1000 - 10000 API reserved codes
10000 - Add-on unit errors
Before anyone adding a unit, contact bazsi@tas.vein.hu to assign a base
error code, to avoid collisions.
The symbolic names of error codes should be defined in the unit which uses
those error codes, except for OS dependent ones, which should be defined here
enclosed in IFDEFs. (The reason is that not always you can't always decide
which error-code belongs to one unit or the other) }
{$IFDEF OS_Linux}
{ for a more complete description of each error check /usr/include/asm/errno.h }
errNotPermitted = 1;
errFileNotFound = 2;
errNoSuchProcess = 3;
errInterruptedCall = 4;
errIOError = 5;
errNoDevAddr = 6;
errTooManyArguments = 7;
errExecError = 8;
errBadFileHandle = 9;
errNoChild = 10;
errTryAgain = 11;
errWouldBlock = errTryAgain;
errOutOfMemory = 12;
errNoPermission = 13;
errInvalidAddress = 14; { Invalid pointer passed to kernel }
errNotBlockDev = 15;
errDeviceBusy = 16;
errFileExists = 17;
errCrossDevice = 18;
errNoSuchDev = 19;
errNotDirectory = 20;
errIsDirectory = 21;
errInvalidArgument = 22;
errFileTableOverflow = 23;
errTooManyOpenFiles = 24;
errNotATTY = 25;
errTextBusy = 26;
errFileTooLarge = 27;
errDiskFull = 28;
errIllegalSeek = 29;
errReadOnlyFS = 30;
errTooManyLinks = 31;
errBrokenPipe = 32;
errMathDomain = 33; { Math domain error, what does this mean? }
errMathRange = 34; { Math result out of range }
errDeadLock = 35;
errFileNameTooLong = 36;
errNoLock = 37; { No record locks available }
errNotImplemented = 38; { Kernel function not implemented }
errDirNotEmpty = 39;
errSymlinkLoop = 40;
errNoMessage = 41; { ??? maybe the IPC getmsg call returns this }
{ Here are some errors that are too cryptic for me, I think they are not used
under Linux, only on some mainframes (channel errors etc) }
errBadFont = 59;
errNotStream = 60;
errNoData = 61;
errTimeOut = 62;
errNoMoreStreams = 63;
errNoNetwork = 64;
errPackageNotInstalled = 65; { ??? }
errRemote = 66;
errSevereLink = 67;
errAdvertise = 68; { Advertise error??? }
errSrMount = 69;
errCommunication = 70; { Communication error on send? }
errProtocol = 71; { Protocol error }
errMuiltiHop = 72;
errDotDot = 73; { RFS specific error ???}
errBadMessage = 74; { Not a data message }
errOverflow = 75;
errNotUnique = 76; { Network name not unique }
errBadFileHandleState = 77;
errRemoteChange = 78; { Remote address changed }
errLibAccess = 79; { Cannot access the needed shared lib }
errLibCorrupt = 80; { Shared library corrupted }
errLibScn = 81;
errLibTooMany = 82; { Too many shared libraries }
errLibExec = 83; { Attempting to execute a shared lib }
errIllegalSequence = 84; { Illegal byte sequence ??? }
errRestart = 85; { interrupted system call should be restarted }
errStreamPipe = 86;
errTooManyUsers = 87;
errNotSocket = 88;
errDestAddrRequired = 89;
errMessageTooLong = 90;
errProtocolType = 91;
errNoSuchProtocol = 92;
errProtocolNotSupported = 93;
errSocketTypeNotSupported = 94;
errOperationNotSupported= 95;
errPFamilyNotSupported = 96; { Protocol family not supported }
errAFamilyNotSupported = 97; { Address family not supported }
errAddressInUse = 98;
errAddressNotAvailable = 99;
errNetDown = 100;
errNetUnreachable = 101;
errNetReset = 102;
errConnAborted = 103;
errConnReset = 104;
errNoBufs = 105;
errAlreadyConn = 106;
errNotConn = 107;
errShutdown = 108;
errTooManyRefs = 109;
errConnTimeOut = 110;
errConnRefused = 111;
errHostDown = 112;
errNoRoute = 113; { No route to host }
errOperationProgress = 114; { Operation already in progress }
errStaleNFSHandle = 115;
errStrucClean = 116; { Structure needs cleaning ? }
{ Xenix specific codes left out }
errRemoteIO = 121;
errQuotaExceeded = 122;
{$ENDIF}
{$IFDEF OS_DOS}
{ DOS specific error-codes to be added }
{$ENDIF}
type
{$IFDEF BIT_32}
CPUWord = Longint;
CPUInt = Longint;
{$ELSE}
CPUWord = Word;
CPUInt = Integer;
{$ENDIF}
PByte = ^Byte;
PWord = ^Word;
PLongint = ^Longint;
{ This code is taken from Brad Williams code, with some modifications }
type
TErrorHandlerReturnValue = (errRetry, errAbort, errContinue);
{ errRetry = retry the operation,
errAbort = abort, return error code,
errContinue = abort, without returning errorcode }
TErrorHandler = function (Code: Longint; Info: Pointer): TErrorHandlerReturnValue;
{ ErrorHandler is the standard procedural interface for all error functions.
Info may contain any data type specific to the error code passed to the
function. }
function GetErrorCode: Longint;
{ Returns the last error code, and resets it to 0 (errOK) }
function GetErrorInfo: Pointer;
{ Returns the info assigned to the previous error, doesn't reset the value to nil }
{$IFDEF PPC_BP}
function SetErrorHandler(AErrorHandler: TErrorHandler): Pointer;
{$ELSE}
function SetErrorHandler(AErrorHandler: TErrorHandler): TErrorHandler;
{$ENDIF}
{ Sets ErrorHandler to AErrorHandler, and returns the old one }
function DefaultErrorHandler(AErrorCode: Longint; AErrorInfo: Pointer): TErrorHandlerReturnValue;
{ Default error handler, simply sets error code, and returns errContinue }
const
ErrorCode: Longint = errOk;
ErrorInfo: Pointer = nil;
ErrorHandler: TErrorHandler = DefaultErrorHandler;
implementation
function GetErrorCode: Longint;
begin
GetErrorCode := ErrorCode;
ErrorCode := 0;
end;
function GetErrorInfo: Pointer;
begin
GetErrorInfo := ErrorInfo;
end;
{$IFDEF PPC_BP}
function SetErrorHandler(AErrorHandler: TErrorHandler): Pointer;
begin
SetErrorHandler := @ErrorHandler;
ErrorHandler := AErrorHandler;
end;
{$ELSE}
function SetErrorHandler(AErrorHandler: TErrorHandler): TErrorHandler;
begin
SetErrorHandler := ErrorHandler;
ErrorHandler := AErrorHandler;
end;
{$ENDIF}
function DefaultErrorHandler(AErrorCode: Longint; AErrorInfo: Pointer): TErrorHandlerReturnValue;
begin
ErrorCode := AErrorCode;
ErrorInfo := AErrorInfo;
DefaultErrorHandler := errAbort; { return error code }
end;
end.
{
$Log$
Revision 1.1 2000-02-29 11:43:16 pierre
Common renamed APIComm to avoid problems with free vision
Revision 1.1 2000/01/06 01:20:31 peter
* moved out of packages/ back to topdir
Revision 1.1 1999/12/23 19:36:47 peter
* place unitfiles in target dirs
Revision 1.1 1999/11/24 23:36:37 peter
* moved to packages dir
Revision 1.1 1998/12/04 12:48:24 peter
* moved some dirs
Revision 1.5 1998/10/28 00:02:05 peter
+ mouse
+ video.clearscreen, video.videobufsize
Revision 1.4 1998/10/26 11:22:48 peter
* updates
Date Version Who Comments
07/12/97 0.1 Bazsi Initial implementation (bazsi)
07/18/97 0.2 Bazsi Linux specific error codes added
07/18/97 0.2.1 Bazsi Some syntactical errors removed...
07/28/97 0.2.2 Bazsi Base error code for Video registered
07/29/97 0.2.3 Bazsi Some basic types added (PByte, PWord etc)
08/08/97 0.2.4 Bazsi Finalized error handling code (Brad's code added)
08/27/97 0.2.5 Bazsi BP doesn't like function types as return-values
for functions, returning Pointer instead
09/06/97 0.2.6 Bazsi Added base error code for Keyboard
11/06/97 0.2.7 Bazsi Added base error code for FileCtrl
}
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