Mail Archives: djgpp/2002/01/28/08:54:13
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I'm still trying to build a minimalistic multi-threading kernel under
DJGPP....
I have tried LWP (thanks to Florian Schulze for a link to a **working**
version of LWP), but its example 4 hangs under Windows 2000, never at the
same position...
So, I continue my little work ;-)
Eli Zarestkii found a enormous bug in my preceeding release (I haven't yet
read crt0 source code ...) so this release uses standard memory allocation
function malloc for stacks.
I do think that a pre-emptive multi-threading kernel under MS-DOS is a wrong
way, since DJGPP libraries, DPMI and DOS aren't reentrant. The only
efficient solution is to use a natively multi-thread OS, like Linux or
Windows NT.
But, it is still possible to develop a NON pre-emptive multi-threading
kernel (like Windows 3.1)
I will have now to find how to use serial ports without loosing characters,
under MS-DOS AND Windows...
For the moment, I send the current release of my work <<task.zip>>
Examples 3 and 4 are the same as LWP one's.
Regards
CB
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<TITLE>multi-threading</TITLE>
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<P><FONT SIZE=3D2 FACE=3D"Arial">I'm still trying to build a =
minimalistic multi-threading kernel under DJGPP....</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">I have tried LWP (thanks to Florian =
Schulze for a link to a **working** version of LWP), but its example =
4 hangs under Windows 2000, never at the same =
position...</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">So, I continue my little work =
;-)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">Eli Zarestkii found a enormous bug in =
my preceeding release (I haven't yet read crt0 source code ...) so this =
release uses standard memory allocation function malloc for =
stacks.</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">I do think that a pre-emptive =
multi-threading kernel under MS-DOS is a wrong way, since DJGPP =
libraries, DPMI and DOS aren't reentrant. The only efficient solution =
is to use a natively multi-thread OS, like Linux or Windows =
NT.</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">But, it is still possible to develop a =
NON pre-emptive multi-threading kernel (like Windows 3.1)</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">I will have now to find how to use =
serial ports without loosing characters, under MS-DOS AND =
Windows...</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">For the moment, I send the current =
release of my work<FONT FACE=3D"Arial" SIZE=3D2 COLOR=3D"#000000"> =
<<task.zip>> </FONT></FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">Examples 3 and 4 are the same as LWP =
one's.</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">Regards</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">CB</FONT>
</P>
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