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A handle can be opened on an existing global Kernel object.
Global Kernel objects are explicitly named by their creators; the technique for finding these objects involves using a search
pattern to search for objects with matching full names. The TFindHandleBase
provides the basic behaviour.
In practice, each specific type has its own class derived from TFindHandleBase
, for example, semaphores have TFindSemaphore
, mutexes have TFindMutex
and so on.
For example, the following code fragment searches for the first global semaphore whose full name ends with the characters "day" and opens a thread-relative handle on that semaphore:
_LIT(KDay,"*day");
...
TFindSemaphore finder(KDay); // derived from TFindHandleBase
TFullName theName;
RSemaphore theSem; // derived from RHandleBase
...
if ((finder.Next(thename))==KErrNone)
{
theSem.Open(finder,EOwnerThread);
...
}
...