CleanerJava24Linker.Holder

java.lang.Object
- io.netty.util.internal.CleanerJava24Linker.Holder

Enclosing class:

CleanerJava24Linker
```
private static final class CleanerJava24Linker.Holder
extends java.lang.Object
```
Links malloc and free on first use rather than when PlatformDependent is initialized, because creating the downcall handles is a startup cost for applications that may never allocate a direct buffer.

Field Summary

Fields
Modifier and Type Field Description

private static MethodHandle INVOKE_FREE

private static MethodHandle INVOKE_MALLOC

private static long RTLD_DEFAULT_UNSUPPORTED

Constructor Summary

Constructors
Modifier Constructor Description

private Holder()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) static void`	`free(long memoryAddress)`
`(package private) static long`	`malloc(long size)`
`private static long`	`rtldDefault()`	The value of the `RTLD_DEFAULT` pseudo-handle for `dlsym(3)` on this platform, or `RTLD_DEFAULT_UNSUPPORTED` if we do not know it.

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

- Field Detail
  - RTLD_DEFAULT_UNSUPPORTED
```
private static final long RTLD_DEFAULT_UNSUPPORTED
```
    See Also:
    
    Constant Field Values
  - INVOKE_MALLOC
```
private static final MethodHandle INVOKE_MALLOC
```
  - INVOKE_FREE
```
private static final MethodHandle INVOKE_FREE
```
- Constructor Detail
  - Holder
```
private Holder()
```
- Method Detail
  - rtldDefault
```
private static long rtldDefault()
```
    The value of the RTLD_DEFAULT pseudo-handle for dlsym(3) on this platform, or RTLD_DEFAULT_UNSUPPORTED if we do not know it. The value is not standardised: glibc and musl use (void*) 0, while macOS and the BSDs use (void*) -2. Windows has no dlsym.
  - malloc
```
static long malloc(long size)
```
  - free
```
static void free(long memoryAddress)
```