Apple Network Setup Manual do Utilizador descarregar pdf (Página 29)

CHAPTER 2

Using Network Setup

Opening and Closing the Network Setup Database 29

If commit is false, the routine calls OTCfgAbortAreaModifications to discard the

changes made in the writable temporary area. The read area is not changed, and

the network protocol stacks continue unaffected.

In contrast to MyCloseDatabaseAfterReading shown in Listing 2-3,

MyCloseDatabaseAfterWriting does not always throw away error results. If

OTCfgCommitAreaModifications returns an error, the

MyCloseDatabaseAfterWriting routine aborts. Your application may respond to

this by calling the same routine again, this time with commit set to false.

Listing 2-4 Closing the database after writing

static OSStatus MyCloseDatabaseAfterWriting(CfgDatabaseRef dbRef,

CfgAreaID readArea,

CfgAreaID writeArea,

Boolean commit)

{

OSStatus err;

OSStatus junk;

assert(dbRef != nil);

assert(readArea != kInvalidCfgAreaID);

assert(writeArea != kInvalidCfgAreaID);

if ( commit ) {

err = OTCfgCommitAreaModifications(dbRef, readArea, writeArea);

} else {

junk = OTCfgAbortAreaModifications(dbRef, readArea);

assert(junk == noErr);

err = noErr;

}

if (err == noErr) {

err = OTCfgCloseDatabase(&dbRef);

}

return err;

}

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Apple Network Setup Manual do Utilizador Página 29