The Companion pdf from the Palm Developer site has a solid section on the
Palm Memory Architecture, Memory Management and the Memory Manager.
-----Original Message-----
From: Alan Pinstein <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Thursday, May 06, 1999 4:21 PM
Subject: Re: Wicked Confused about memory
>I don't personally know of any books on the subject. When I started out, I
>just had lots of long conversations in front of a whiteboard with a
>colleague who was a CS major. That woud be your best option. I am sure that
>someone could recommend a book, though.
>
>
>Alan Pinstein
>Synergy Solutions, Inc.
>http://www.synsolutions.com
>1-800-210-5293
>
>
>>Point well taken. I see now that having just the basic grasp of how memory
on
>>the palm works is not enough.. I have learned a lot during my trials and
>>tribulations. :)
>>
>>Can you suggest where I can read-up on this stuff. The O'Riely book glazes
>>over it as if I allready have an understanding. (which I thought I did! )
I
>>guess I just know the basics of memory and not the nitty gritty details..
I'm
>>all for learning.. I'm not sure where I start..
>>
>>Thanks Again,
>>
>>Philip J.
>>
>>Alan Pinstein wrote:
>>
>>> Well, there's a few issues here. First of all, what is
StaticRecordingInfo?
>>> If the NameString member isn't the correct size, then the StrCopy() will
>>> definitely cause problems... is the NameString member a char* or a
>>> char[SOME_LENGTH]? If it's a char*, you also need to allocate memory to
it.
>>>
>>> Second of all, you are leaking memory. Since LCurrentStatPtr is a local
>>> var, it is going out of scope at the end of this function and you never
>>> free it.
>>>
>>> Not to be harsh, but you have a lot to learn about Memory Management. If
I
>>> were you, I'd read up as much as possible about Palm OS memory
management,
>>> and Memory management in general. If you don't understand how memory
works
>>> in programming, you will have permanent headaches trying to program. I
>>> should know, I had a headache for the first few months I was programming
>>> Palm ;) Being a master at how memory works isn't an option in
programming.
>>> It's simply a necessity.
>>>
>>> Good luck,
>>>
>>> Alan Pinstein
>>> Synergy Solutions, Inc.
>>> http://www.synsolutions.com
>>> 1-800-210-5293
>>>
>>> >Hi all,
>>> >
>>> >thanks for you plethora of suggestions on my last problem..
>>> >
>>> >I keep getting a bus err with this little chunk of code. . I'm
following
>>> >examples in the O'r book.. and Cripes! I can't figure out why. I'm sure
>>> >it has something to do with my complete lack of understanding.. but I
>>> >thought one second from yall would save me hours. :) Thanks..
>>> >
>>> >static Boolean DatabaseOkButtonHook(void)
>>> >{
>>> > StaticRecordingInfo *LCurrentStatPtr;
>>> > FieldPtr fld = GetObjectPtr(databaseNameStringField);
>>> >
>>> > gCurrentStatHand = MemHandleNew(sizeof (StaticRecordingInfo));
>>> > LCurrentStatPtr = MemHandleLock(gCurrentStatHand);
>>> >
>>> > //here we're copying the new database name into memory
>>> > if (FldGetTextPtr(fld) != NULL)
>>> > {
>>> > StrCopy(LCurrentStatPtr->NameString, FldGetTextPtr(fld));
>>> > }
>>> > MemHandleUnlock(gCurrentStatHand);
>>> >
>>> > if ( checkDBName(LCurrentStatPtr->NameString) )
>>> > {
>>> > FrmGotoForm(RecordForm);
>>> > }
>>> > else
>>> > {
>>> > FrmAlert(DbnameAlert);
>>> > }
>>> > return 0;
>>> > }
>>> >
>>> >Any ideas?
>>> >
>>> >Thanks again,
>>> >
>>> >Philip J.
>
>
>
>
