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<div class=Section1>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;color:blue'>Sorry, it is not pthread_t being defined as "int";
it is SANE_Pid (in sanei_thread.h)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;color:blue'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
sane-devel-bounces+glen.petrie=eitc.epson.com@lists.alioth.debian.org
[mailto:sane-devel-bounces+glen.petrie=eitc.epson.com@lists.alioth.debian.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Petrie, Glen<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 08, 2012
2:56 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
sane-devel@lists.alioth.debian.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [sane-devel] Concerns
with pthread in SANE</span></font><font face="Times New Roman"><span
style='font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'>Hello
all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'>As you
may know (not know), I am try put the SANE dll into the LSB (the Linux Standard
Base). In doing so, I need to include the testing tools and, as
such, I trying to get all of SANE to compile and execute correctly using the
LSB's compiler (lsbcc). With the changes (only a few) I have made, I can
compile and link SANE under the LSB with the exception of using pthreads.
There are a couple of warnings to note:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.25in;mso-list:l1 level1 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>1.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>The variable type pthread_t (for
linux) is defined as "int" and test are done against negative values
(specifically, -1) of this type.<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in;text-indent:-.25in;mso-list:l1 level2 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>a.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>While, in general, pthread_t is
supposed to be opaque entity (object); it is typically defined as
"unsigned long int" which produce many warning of unsigned and signed
comparison.<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.75in;text-indent:-1.75in;mso-text-indent-alt:
-9.0pt;mso-list:l1 level3 lfo5'><![if !supportLists]><font size=3 face=Cambria><span
style='font-size:12.0pt'><span style='mso-list:Ignore'><font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font>i.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>From the web the recommendations
for <o:p></o:p></p>
<p class=MsoNormal style='margin-left:2.25in;text-indent:-.25in;mso-list:l1 level4 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>1.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>defining an invalid pthread
(versus using "-1") is to use " pthread_t invalid_thread =
pthread_self();<o:p></o:p></p>
<p class=MsoNormal style='margin-left:2.25in;text-indent:-.25in;mso-list:l1 level4 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>2.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>setting incorrect pthread_t to
"invalid_thread" versus "-1"<o:p></o:p></p>
<p class=MsoNormal style='margin-left:2.25in;text-indent:-.25in;mso-list:l1 level4 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>3.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>and comparison should be done
using "if (pthread_equal(pid, invalid_thread))" versus "if (pid
== -1)"<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.25in;mso-list:l1 level1 lfo5'><![if !supportLists]><font
size=3 face=Cambria><span style='font-size:12.0pt'><span style='mso-list:Ignore'>2.<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]>I also found some if statements
that use "B_OK" but I could not find where "B_OK" is
defined (either in SANE stuff or /usr/…)<o:p></o:p></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'>Based
on the above there are too many changes involved in pthread code and I don't
want to introduce errors into SANE; so, I will disable pthread for the LSB work
(useless someone else updates the pthread code as recommend by the suggestions
on the web).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'>Glen
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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