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Re: netcdf Memory leaks

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  • Subject: Re: netcdf Memory leaks
  • Date: Tue, 07 Feb 1995 13:37:23 -0700
Hi Tom,

> Thanks for the advice on the memory leaks in NcFile::sync().  We
> applied them and the leaks are gone.  Unfortunately, we don't

You're welcome.  I assume you mean "Fortunately"

> use ncsync() to detect if another process has made changes to the
> variables or dimensions.  Our application is a single server that
> satifies requests from a suite of clients.
> 
> While we were at it, we found and corrected a memory leak in 
> NcTypeComponent::Nc_as() and as_string(). The changes are listed below.
> If these are known leaks, please disregard them.  If you have a
> better solution, let us know and we'll be happy to install it instead.

I didn't know about these leaks.  I need to construct a test for all the
member functions and then run it under Purify.  Thanks for these fixes.
Your solution looks workable to me.  If you find any more leaks, please let
me know.

--Russ

> - -------------- Old section of netcdf.cc ----------------------------
> 
> #define Nc_as(TYPE) name2(as_,TYPE)
> #define NcTypedComponent_as(TYPE)                                           \
> TYPE NcTypedComponent::Nc_as(TYPE)( int n ) const                           \
> {                                                                           \
>     return values()->Nc_as(TYPE)(n);                                        \
> }
> NcTypedComponent_as(ncbyte)
> NcTypedComponent_as(char)
> NcTypedComponent_as(short)
> NcTypedComponent_as(long)
> NcTypedComponent_as(float)
> NcTypedComponent_as(double)
> 
> char* NcTypedComponent::as_string( int n ) const
> {
>     return values()->as_string(n);
> }
> 
> 
> 
> - ------------- Changes to remove leaks in netcdf.cc ----------------------
> #define Nc_as(TYPE) name2(as_,TYPE)
> #define NcTypedComponent_as(TYPE)                                           \
> TYPE NcTypedComponent::Nc_as(TYPE)( int n ) const                           \
> {                                                                           \
>     NcValues *tmp = values();                                                 
> \
>     TYPE rval = tmp->Nc_as(TYPE)(n);                                          
> \
>     delete tmp;                                                               
> \
>     return rval;                                                              
> \
> }
> NcTypedComponent_as(ncbyte)
> NcTypedComponent_as(char)
> NcTypedComponent_as(short)
> NcTypedComponent_as(long)
> NcTypedComponent_as(float)
> NcTypedComponent_as(double)
> 
> char* NcTypedComponent::as_string( int n ) const
> {
>         NcValues *tmp = values();
>         char *str = tmp->as_string(n);
>         delete tmp;
>         return str;
> }
> ------- end -------

______________________________________________________________________________

Russ Rew                                                UCAR Unidata Program
address@hidden                                          P.O. Box 3000
http://www.unidata.ucar.edu/                          Boulder, CO 80307-3000
______________________________________________________________________________