| Package | Description | 
|---|---|
| com.gigaspaces.internal.utils.concurrent | |
| com.j_spaces.core | Provides Space properties and security context services | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | NonReentrantSimpleLockA non reentrant implementation of  ISimpleLockThe implementation intent is to save
 memory, therefore the synchronization is done on the lock object it self, no user should
 synchronize on the lock object it self as it may create deadlocks. | 
| class  | ReentrantSimpleLockReentrant implementation of  ISimpleLockThe implementation intent is to save memory,
 therefore the synchronization is done on the lock object it self, no user should synchronize on
 the lock object it self as it may create deadlocks. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | XtnEntry | 
| class  | XtnInfo | 
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