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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think the key part of the paragraph is “</span><span
style='font-family:"Calibri","sans-serif"'>FloatToStrF is not thread-safe”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>More than
yourself can change the global format settings. Your Delphi app is no doubt
reloading them in response to windows telling everything to reload the environment.
set Application.UpdateFormatSettings := False;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Still this
wont make the standard floattostrf thread safe, just save the environment of
your app from changing under your feet.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Also, Application.UpdateMetricSettings
:= False;</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> delphi-bounces@delphi.org.nz
[mailto:delphi-bounces@delphi.org.nz] <b>On Behalf Of </b>Ross Levis<br>
<b>Sent:</b> Thursday, 4 March 2010 9:59 p.m.<br>
<b>To:</b> 'NZ Borland Developers Group - Delphi List'<br>
<b>Subject:</b> Re: [DUG] Need help in format function<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>There
is no problem at all using this function in multiple threads if you don’t need
to change the Format Settings. To quote from the D7 documentation…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>The first
form of FloatToStrF is not thread-safe, because it uses localization information
contained in global variables.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>If
you did change the global format settings such as DecimalSeparator so that the
decimal place was a comma as used in Europe, this would affect the function
being used in another thread.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Ross.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> delphi-bounces@delphi.org.nz
[mailto:delphi-bounces@delphi.org.nz] <b>On Behalf Of </b>Vikas...<br>
<b>Sent:</b> Thursday, 4 March 2010 7:03 p.m.<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> Re: [DUG] Need help in format function<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>well we are not using Multi
threading in this case . This is a legacy system and we have no plans to
consider threading in it in future. Person who programed it in 1997 dint
considered any safe practices before, he just worte in a fashion which serve
the req of client.<br>
<br>
Well intiitaly i was tying with fromat fuction but i dint served my purpose
then i moved to floattostrf this is not healthy functions in multi threaded
that i knew it.<br>
<br>
But anyways like i said in previous mail my work arround made the bug to go
away and made my client stop complaing of the loses he occrured due to this <img
width=12 height=12 id="_x0000_i1025" src="cid:image001.gif@01CABBF3.186B1B40"><br>
<br>
But yeah i will re change it soon to optimise the way u guys sugguesting<br>
<br>
thanks<o:p></o:p></p>
<div>
<p class=MsoNormal>On Thu, Mar 4, 2010 at 3:20 AM, Jolyon Smith <<a
href="mailto:jsmith@deltics.co.nz">jsmith@deltics.co.nz</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:11.0pt;color:#1F497D'>Writing code that is
thread-safe is still safe when there is only one thread, but it sure does make
things easier if/when you want to introduce threads later on. The only
time that it makes sense to write code that is knowingly not thread-safe is
when you’ve made the conscious choice to write single threaded code, but if the
code is single threaded only because threading has not even been considered
(yet) …</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:11.0pt;color:#1F497D'>The original poster may also
have been simply unaware of the threading issues with these functions.
Making assumptions is *<b>always</b>* dangerous.</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-US><o:p></o:p></span></p>
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border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color blue'>
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border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt'>From:</span></b><span lang=EN-US
style='font-size:10.0pt'> <a href="mailto:delphi-bounces@delphi.org.nz"
target="_blank">delphi-bounces@delphi.org.nz</a> [mailto:<a
href="mailto:delphi-bounces@delphi.org.nz" target="_blank">delphi-bounces@delphi.org.nz</a>]
<b>On Behalf Of </b>Colin Johnsun<br>
<b>Sent:</b> Thursday, 4 March 2010 10:35 a.m.<o:p></o:p></span></p>
<div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt'><br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> Re: [DUG] Need help in format function<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span
lang=EN-US>I don't remember reading in the original post that Vikas needed the
function in a multi-threaded app?<br>
In fact, the original FloatToStrF that Vikas used in his original post is the
non-threaded version, so I think it is reasonable to assume that he was using
it in a single threaded fashion. But thanks for pointing out how useless <b>Format
( Const Formatting : string; Const Data : array of const) : string;
</b>is for multi-threaded situations.<br>
<br>
Regards,<br>
Colin<o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>On 4 March 2010 08:07, Cameron Hart <<a
href="mailto:Cameron.Hart@flowsoftware.co.nz" target="_blank">Cameron.Hart@flowsoftware.co.nz</a>>
wrote:<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>And completely useless when it comes to multiple threads...<br>
<br>
Atleast use the thread safe version<br>
<br>
function Format ( Const Formatting : string; Const Data : array of<br>
const; FormatSettings : TFormatSettings ) : string;<br>
<br>
<br>
<br>
Cameron Hart | Development Manager | Flow Software Limited<br>
P: +64 9 476 3579 | M: +64 21 222 3569 | E:<br>
<a href="mailto:cameron.hart@flowsoftware.co.nz" target="_blank">cameron.hart@flowsoftware.co.nz</a><br>
PO Box 305-237, Triton Plaza, Auckland 0757, New Zealand |<br>
<a href="http://www.flowsoftware.co.nz" target="_blank">www.flowsoftware.co.nz</a><br>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US><br>
-----Original Message-----<br>
From: <a href="mailto:delphi-bounces@delphi.org.nz" target="_blank">delphi-bounces@delphi.org.nz</a>
[mailto:<a href="mailto:delphi-bounces@delphi.org.nz" target="_blank">delphi-bounces@delphi.org.nz</a>]<br>
On Behalf Of Colin Johnsun<br>
Sent: Thursday, 4 March 2010 9:44 a.m.<br>
To: NZ Borland Developers Group - Delphi List<br>
Subject: Re: [DUG] Need help in format function<br>
<br>
Hey Phil :)<br>
<br>
You beat me too it!<br>
<br>
It's clean, readable and concise.<br>
Plus there's no mucking around with strings!!<br>
<br>
+1 from me :)<br>
<br>
cheers, Colin<br>
<br>
On Thursday, March 4, 2010, Phil Scadden <<a
href="mailto:p.scadden@gns.cri.nz" target="_blank">p.scadden@gns.cri.nz</a>>
wrote:<br>
> I think it easier to do format( '%.2f', [trunc(value*100)/100]);<br>
><br>
><br>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
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<br>
-- <br>
vikas<o:p></o:p></p>
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