4.4.5 Persistent Objects

The __persistent qualifier can be used to indicate that variables should not be cleared by the runtime startup code.

Use the native keywords discussed in the Differences section to look up information on the semantics of this qualifier.

Example

The following shows a variable qualified using __persistent.

__persistent int serialNo;

Differences

The 8-bit compilers have used the qualifier, persistent, to indicate this meaning.

The 16- and 32-bit compilers have used the persistent attribute with variables to indicate they were not to be cleared.

Migration to the CCI

With 8-bit compilers, change any occurrence of the persistent qualifier to __persistent, e.g., from:

persistent char template[20];

to:

__persistent char template[20];

For the 16- and 32-bit compilers, change any occurrence of the persistent attribute to __persistent, for example, from:

int tblIdx __attribute__ ((persistent));

to:

int __persistent tblIdx;

Caveats

None.