UnsafeMemoryProvider (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.mem.unsafe.UnsafeMemoryProvider

All Implemented Interfaces:

DirectMemoryProvider
```
public class UnsafeMemoryProvider
extends Object
implements DirectMemoryProvider
```
Memory provider implementation based on unsafe memory access.
Supports memory reuse semantics.

Constructor Summary

Constructors
Constructor	Description
`UnsafeMemoryProvider(@Nullable IgniteLogger log)`
`UnsafeMemoryProvider(@Nullable IgniteLogger log, @Nullable MemoryAllocator allocator)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`initialize(long[] sizes)`
`DirectMemoryRegion`	`nextRegion()`	Attempts to allocate next memory region.
`void`	`shutdown(boolean deallocate)`	Shuts down the provider.

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

- Constructor Detail
  - UnsafeMemoryProvider
```
public UnsafeMemoryProvider(@Nullable
                            @Nullable IgniteLogger log)
```
    Parameters:
    
    log - Ignite logger to use.
  - UnsafeMemoryProvider
```
public UnsafeMemoryProvider(@Nullable
                            @Nullable IgniteLogger log,
                            @Nullable
                            @Nullable MemoryAllocator allocator)
```
    Parameters:
    
    log - Ignite logger to use.
    
    allocator - Memory allocator. If null, default UnsafeMemoryAllocator will be used.
- Method Detail
  - initialize
```
public void initialize(long[] sizes)
```
    Specified by:
    
    initialize in interface DirectMemoryProvider
    
    Parameters:
    
    sizes - Initializes provider with the chunk sizes.
  - shutdown
```
public void shutdown(boolean deallocate)
```
    Shuts down the provider.
    
    Specified by:
    
    shutdown in interface DirectMemoryProvider
    
    Parameters:
    
    deallocate - True to deallocate memory, false to allow memory reuse.
  - nextRegion
```
public DirectMemoryRegion nextRegion()
```
    Attempts to allocate next memory region. Will return null if no more regions are available.
    
    Specified by:
    
    nextRegion in interface DirectMemoryProvider
    
    Returns:
    
    Next memory region.