Contents

compareProperty(OSDictionary *, const OSString *)

Compares a property in a matching dictionary with an IOService object's property table.

Declaration

virtual bool compareProperty(
 OSDictionary *matching, 
 const OSString *key );

Parameters

  • matching:

    The matching dictionary, which must be non-zero.

  • key:

    The dictionary key specifying the property to be compared, as an OSString (which includes OSSymbol).

Return Value

true if the property does not exist in the matching table. If the property exists in the matching dictionary but not the IOService property table, failure is returned. Otherwise the result of calling the property from the matching dictionary's isEqualTo method with the IOService property as an argument is returned.

Overview

This is a helper function to aid in implementing matchPropertyTable. If the property specified by key exists in the matching dictionary, it is compared with a property of the same name in the IOService object's property table. The comparison is performed with the isEqualTo method. If the property does not exist in the matching table, success is returned. If the property exists in the matching dictionary but not the IOService property table, failure is returned.

See Also

Miscellaneous