Thank you. I will try to locate this SDK and download it.
So much for getting the basic program written over the weekend... ----- Original Message ----- From: "Aaron Ardiri" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[email protected]> Sent: Sunday, October 09, 2005 11:22 AM Subject: Re: Structure of structures On 10/9/05, Del Ventruella <[EMAIL PROTECTED]> wrote: > Is the corresponding load sequence: > > void LoadData(DmOpenRef db, myStructType *myStructP){ > MemHandle recH=NULL; > UInt8 *recP; > UInt16 recIndex=-1; //will save the data in a new record at the > end of the database > > RecH=DmNewRecord(db, recIndex, sizeof(myStructType)); > if (recH){ > recP=MemHandleLock(recH); > DmRead(recP,0,myStructP, sizeof(myStructType)); > } > } > > ? > > One other question, the part about saving the pointer data. > > The pointer contains the address of the data. yes. > Under PalmOS, there is no hard drive where this data safely resides. palmos has a special memory management system that stores both dynamic memory and storage memory in the same space - there is no file system (like windows), but you can open/close files and a layer if provided for record/resource level access. > If the address is overwritten, you lose the data. Okay, that I understand. yes. > How does one store (and load) this pointer data DmGetRecord, MemMove combination (opposite of DmNewRecord, DmWrite) > in a manner that will insure that it is retained? it wont be retained in the same memory location (unless you save/load at same time) however, the contents should be mirrored with a MemMove. i would recommend you download the SDK documentation and take a look at the PalmOS Companion section and give it a quick read over. it may take a little longer to read everything; but, the document does a pretty good job at covering the basics of how memory is managed and gives appropriate advice and examples on how to do so. i purchased this in hardcopy back in 1999 when fatbrain.com was doing hard copies and its been the most valuable reference i've ever used. i also used to do a lot of international flights so i had plenty of time to give it a read :) -- // Aaron Ardiri -- For information on using the PalmSource Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the PalmSource Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
