ReentryGuard.ReentryGuardImpl (Logback-Parent 1.5.34 API)

java.lang.Object
- ch.qos.logback.core.util.ReentryGuard.ReentryGuardImpl

All Implemented Interfaces:

ReentryGuard

Enclosing interface:

ReentryGuard
```
public static class ReentryGuard.ReentryGuardImpl
extends Object
implements ReentryGuard
```
Default per-thread implementation backed by a ThreadLocal.
Semantics: a value of Boolean.TRUE indicates the current thread is inside a guarded region. If the ThreadLocal has no value (null), isLocked() treats this as unlocked (returns false).

Note: this implementation intentionally uses ThreadLocal<Boolean> to avoid global synchronization. The initial state is unlocked.
Typical usage:
```
 if (!guard.isLocked()) {
   guard.lock();
   try {
     // guarded work
   } finally {
     guard.unlock();
   }
 }
 
```

Nested Class Summary
- Nested classes/interfaces inherited from interface ch.qos.logback.core.util.ReentryGuard
  ReentryGuard.NOPRentryGuard, ReentryGuard.ReentryGuardImpl

Constructor Summary

Constructors
Constructor Description

ReentryGuardImpl()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`isLocked()`	Return true if the current thread holds the guard (i.e. is inside a guarded region).
`void`	`lock()`	Mark the guard as locked for the current thread.
`void`	`unlock()`	Release the guard for the current thread.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ReentryGuardImpl
```
public ReentryGuardImpl()
```
- Method Detail
  - isLocked
```
public boolean isLocked()
```
    Description copied from interface: ReentryGuard
    
    Return true if the current thread holds the guard (i.e. is inside a guarded region).
    Implementations typically return false if the current thread has not previously called ReentryGuard.lock() or if the stored value is null.
    
    Specified by:
    
    isLocked in interface ReentryGuard
    
    Returns:
    
    true if the guard is locked for the current thread, false otherwise
  - lock
```
public void lock()
```
    Description copied from interface: ReentryGuard
    
    Mark the guard as locked for the current thread.
    Callers must ensure ReentryGuard.unlock() is invoked in a finally block to avoid leaving the guard permanently locked for the thread.
    
    Specified by:
    
    lock in interface ReentryGuard
  - unlock
```
public void unlock()
```
    Description copied from interface: ReentryGuard
    
    Release the guard for the current thread.
    After calling unlock() the ReentryGuard.isLocked() should return false for the current thread (unless lock() is called again).
    
    Specified by:
    
    unlock in interface ReentryGuard