Re: Berkeley DB: opening and closing with functions

"Sarge" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> Your problem is simple - you are calling db_create() with the
> address of a stack argument.  So the DB* that you pass in to
> the function DB_Open() is not changed.  In other words,
> change it to something like this:
> 
> int DB_Open(DB **dbHandle, char *DATABASE)
> {
>     DB *db;
> 
>    // Create the handle.
>    int ret = db_create(&db, NULL, 0);
> 
>    if (ret==0) {
>       // Open the database for read only.
>       ret = db->open(db, NULL, DATABASE, NULL,
>                            DB_BTREE, DB_RDONLY, 0664);
>    }
>    *dbHandle = db;
>    return(0);
> }
> 
> Hope this helps,
> --Sarge

Sweet!  It _did_ help, thank you very much.  I'm new to this and
learning as I go.  Thanks again.

  -Jim


> 
> 
> "Anon" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > I'm writing an application that will use either a single Berkeley
> > database, or multiple databases, to simply access data.  The
> > database(s) will not be modified at all.
> >
> > What I'm having trouble with is that I'm trying to pass database
> > handles to functions that will, among other things, open and close a
> > database, retrieve elements from a database, etc.  But I'm getting
> > segmentation faults when actions are performed with these passed-in
> > handles, and I'm not sure why.  Below are my DB_Open() and DB_Close()
> > functions (without the full checking of the "ret" variable to keep
> > this post small).  The DB_Open() seems to work fine, but when the
> > DB_Close() attempts to close the dbHandle, the app crashes.
> > Additionally, if I pull the contents of these functions out and place
> > them in-line in the main() procedure, they work fine.  Any insight
> > would be greatly appreciated.  Thank you.
> >
> > /**********************************************************
> >  **********************************************************/
> > int DB_Open(DB *dbHandle, char *DATABASE) {
> >    // Create the handle.
> >    int ret = db_create(&dbHandle, NULL, 0);
> >
> >    if (ret==0) {
> >       // Open the database for read only.
> >       ret = dbHandle->open(dbHandle, NULL, DATABASE, NULL,
> >                            DB_BTREE, DB_RDONLY, 0664);
> >    }
>  return(0);
> > }
> >
> > /**********************************************************
> >  **********************************************************/
> > int DB_Close(DB *dbHandle) {
> >    int ret = 0;
> >
> >    ret = dbHandle->close(dbHandle, 0);
> >
> >    return(0);
> > }