[Mono-list] Weird Queue morphing
Pablo Baena
pbaena@uol.com.ar
08 Nov 2002 14:48:14 +0000
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The Queue class is having problems Dequeing.
I got around this by doing queue.Peek() and then queue.Dequeue(). It
won't corrupt the queue.
I will fill a bug report if it isn't already.
Pablo
On Fri, 2002-11-08 at 17:16, Erik C wrote:
Ok please help me figure out if my code is bad(most
likely the case)...or if this is a bug in the Queue
class. It looks like the Queue fills up with 20
objects and then as I dequeue them suddenly the value
objects changes after I've dequeued 16 of them?!?!
The following debug output was made from the attached
code(the code is an attempt of making a port scanner)
thanks in advance,
-Erik-
University of Florida
my compile line::
mcs -checked -o Scanner.exe -t:exe Scanner.cs
my run line::
mono Scanner.exe -p 1-20 127.0.0.1
snip of output::
Just dequeued emptyQ=False targetQ.COunt=5 port=15
ip=127.0.0.1
Q size=5
This is the Queue now:
Port=16 IP=127.0.0.1 isOpen=False
Port=17 IP=127.0.0.1 isOpen=False
Port=18 IP=127.0.0.1 isOpen=False
Port=19 IP=127.0.0.1 isOpen=False
Port=20 IP=127.0.0.1 isOpen=False
Just dequeued emptyQ=False targetQ.COunt=4 port=16
ip=127.0.0.1
Q size=4
This is the Queue now:
Port=1 IP=127.0.0.1 isOpen=False
Port=2 IP=127.0.0.1 isOpen=False
Port=3 IP=127.0.0.1 isOpen=False
Port=4 IP=127.0.0.1 isOpen=False
Just dequeued emptyQ=False targetQ.COunt=3 port=1
ip=127.0.0.1
Q size=3
This is the Queue now:
Port=2 IP=127.0.0.1 isOpen=False
Port=3 IP=127.0.0.1 isOpen=False
Port=4 IP=127.0.0.1 isOpen=False
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The Queue class is having problems Dequeing.
<BR>
I got around this by doing queue.Peek() and then queue.Dequeue(). It won't corrupt the queue.
<BR>
<BR>
I will fill a bug report if it isn't already.
<BR>
Pablo
<BR>
<BR>
On Fri, 2002-11-08 at 17:16, Erik C wrote:
<BLOCKQUOTE>
<PRE><FONT COLOR="#737373"><FONT SIZE="3"><I>Ok please help me figure out if my code is bad(most</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>likely the case)...or if this is a bug in the Queue</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>class. It looks like the Queue fills up with 20</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>objects and then as I dequeue them suddenly the value</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>objects changes after I've dequeued 16 of them?!?!</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>The following debug output was made from the attached</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>code(the code is an attempt of making a port scanner)</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>thanks in advance,</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>-Erik-</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>University of Florida</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>my compile line::</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>mcs -checked -o Scanner.exe -t:exe Scanner.cs</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>my run line::</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>mono Scanner.exe -p 1-20 127.0.0.1</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>snip of output::</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Just dequeued emptyQ=False targetQ.COunt=5 port=15</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>ip=127.0.0.1</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Q size=5</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>This is the Queue now:</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=16 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=17 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=18 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=19 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=20 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Just dequeued emptyQ=False targetQ.COunt=4 port=16</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>ip=127.0.0.1</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Q size=4</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>This is the Queue now:</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=1 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=2 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=3 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=4 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Just dequeued emptyQ=False targetQ.COunt=3 port=1</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>ip=127.0.0.1</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Q size=3</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>This is the Queue now:</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=2 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=3 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Port=4 IP=127.0.0.1 isOpen=False</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I></FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>__________________________________________________</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>Do you Yahoo!?</FONT></FONT></I>
<FONT COLOR="#737373"><FONT SIZE="3"><I>U2 on LAUNCH - Exclusive greatest hits videos</FONT></FONT></I></PRE>
</BLOCKQUOTE>
<A HREF="http://launch.yahoo.com/u2"><FONT SIZE="3"><I>http://launch.yahoo.com/u2</FONT></I></A>
<BLOCKQUOTE>
<PRE></PRE>
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