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{
<partof>
Copyright (c) 1998 by <yourname>
<infoline>
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
unit netware;
interface
const
NlmLib = 'nlmlib.nlm';
type
fdSet=array[0..7] of longint;{=256 bits}
pfdset=^fdset;
TFDSet=fdset;
timeval = packed record
sec,usec:longint
end;
ptimeval=^timeval;
TTimeVal=timeval;
Function Select(N:longint;readfds,writefds,exceptfds:PFDSet;TimeOut:PTimeVal):longint; CDECL; EXTERNAL NlmLib NAME 'select';
Function Select(N:longint;readfds,writefds,exceptfds:PFDSet;TimeOut:Longint):longint;
Function SelectText(var T:Text;TimeOut :PTimeVal):Longint;
Procedure FD_Zero(var fds:fdSet);
Procedure FD_Clr(fd:longint;var fds:fdSet);
Procedure FD_Set(fd:longint;var fds:fdSet);
Function FD_IsSet(fd:longint;var fds:fdSet):boolean;
Function GetFS (var T:Text):longint;
Function GetFS(Var F:File):longint;
implementation
Function Select(N:longint;readfds,writefds,exceptfds:PFDSet;TimeOut:Longint):longint;
{
Select checks whether the file descriptor sets in readfs/writefs/exceptfs
have changed.
This function allows specification of a timeout as a longint.
}
var
p : PTimeVal;
tv : TimeVal;
begin
if TimeOut=-1 then
p:=nil
else
begin
tv.Sec:=Timeout div 1000;
tv.Usec:=(Timeout mod 1000)*1000;
p:=@tv;
end;
Select:=Select(N,Readfds,WriteFds,ExceptFds,p);
end;
Function SelectText(var T:Text;TimeOut :PTimeval):Longint;
Var
F:FDSet;
begin
if textrec(t).mode=fmclosed then
begin
{LinuxError:=Sys_EBADF;}
exit(-1);
end;
FD_Zero(f);
FD_Set(textrec(T).handle,f);
if textrec(T).mode=fminput then
SelectText:=select(textrec(T).handle+1,@f,nil,nil,TimeOut)
else
SelectText:=select(textrec(T).handle+1,nil,@f,nil,TimeOut);
end;
{--------------------------------
FiledescriptorSets
--------------------------------}
Procedure FD_Zero(var fds:fdSet);
{
Clear the set of filedescriptors
}
begin
FillChar(fds,sizeof(fdSet),0);
end;
Procedure FD_Clr(fd:longint;var fds:fdSet);
{
Remove fd from the set of filedescriptors
}
begin
fds[fd shr 5]:=fds[fd shr 5] and (not (1 shl (fd and 31)));
end;
Procedure FD_Set(fd:longint;var fds:fdSet);
{
Add fd to the set of filedescriptors
}
begin
fds[fd shr 5]:=fds[fd shr 5] or (1 shl (fd and 31));
end;
Function FD_IsSet(fd:longint;var fds:fdSet):boolean;
{
Test if fd is part of the set of filedescriptors
}
begin
FD_IsSet:=((fds[fd shr 5] and (1 shl (fd and 31)))<>0);
end;
Function GetFS (var T:Text):longint;
{
Get File Descriptor of a text file.
}
begin
if textrec(t).mode=fmclosed then
exit(-1)
else
GETFS:=textrec(t).Handle
end;
Function GetFS(Var F:File):longint;
{
Get File Descriptor of an unTyped file.
}
begin
{ Handle and mode are on the same place in textrec and filerec. }
if filerec(f).mode=fmclosed then
exit(-1)
else
GETFS:=filerec(f).Handle
end;
end.
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