Delphi - threads and FindFirst function
- by radu-barbu
Hi,
I'm encountering a big problem when i'm trying to make a recursive search function inside a thread (using delphi 7) bellow is the code:
TParcFicDir = class(TThread)
private
several variables..
protected
procedure Execute; override;
public
constructor Create(CreateSuspended: Boolean);
constructor TParcFicDir.Create(CreateSuspended: Boolean);
begin
inherited Create(CreateSuspended);
end;
procedure TParcFicDir.Execute;
begin
try
FindFiles(FStartDir,FMask);//'c:\' and '*.*'
except on e:Exception do
end;
end;
procedure TParcFicDir.FindFiles(StartDir, FileMask: string);
var
wTmp : string;
f:TextFile;
wTempSR:TSearchRec;
function Search(StartDir, FileMask: string): string;
var
SR : TSearchRec;
IsFound : Boolean;
files : integer;
dirs : integer;
t : string;
begin
try
files := 0;
dirs := 0;
if StartDir[length(StartDir)] <> '\' then
StartDir := StartDir + '\';
try
IsFound := (FindFirst(StartDir + '*.*', faAnyFile, SR) = 0);// here the thread gets interrupted
except on e: Exception do
end;
while IsFound do
begin
if (SR.Name <> '.') and (SR.Name <> '..') then
if ((SR.Attr and faDirectory) <> 0) then
if FScanDirs then
begin
inc(dirs);
t := Search(StartDir + SR.Name, FileMask);
try
files := files + strtoint(copy((t), 0, pos('#', t) - 1));//old code, don't take on calcul;
Delete(t, 1, pos('#', t));
dirs := dirs + strtoint(t);
except on e: Exception do
end;
begin
t := StartDir + SR.Name;
wTmp := t;
wtmp := '';
Inc(FDirNo);
writeln(f,t);
inc(filno);
end;
end
else
if ScanFiles then
begin
inc(filno);
inc(files);
end;
IsFound := FindNext(SR) = 0;
end;
Result := IntToStr(files) + '#' + IntToStr(dirs);
sysutils.FindClose(SR);
except on e: Exception do
end;
end;
begin
filno := 0;
try
try
if trim(FPathFileTmp)<>'' then
AssignFile(f, FPathFileTmp+'Temp.bak')
else
AssignFile(f,ExtractFileDir(GetDllName)+'\Temp.bak');
Rewrite(f);
Search(StartDir, FileMask);
if StartDir[length(StartDir)] = '\' then
delete(StartDir, length(StartDir), 1);
wTmp := StartDir;
wTmp := '';
if FindFirst(StartDir, faDirectory, wTempSR) = 0 then
writeln(f);
writeln(f);
CloseFile(f);
except on e: Exception do
end;
finally
end;
end;
ok, probably the code is a little messed up, but i don't understand why the thread ends at 'findfirst' part....i googled it, no results.
any help will be appreciated!
Thanks in advance
