java.lang.Object
- one.nio.mem.FixedSizeAllocator

All Implemented Interfaces:: Allocator

public class FixedSizeAllocator
extends Object
implements Allocator

Field Summary

Fields
Modifier and Type	Field	Description
`protected long`	`chunkSize`
`protected long`	`entrySize`
`protected long`	`head`
`protected static long`	`headOffset`
`protected long`	`startAddress`
`protected long`	`totalMemory`
`protected long`	`totalPages`
`protected AtomicLong`	`usedPages`

Constructor Summary

Constructors
Constructor	Description
`FixedSizeAllocator(long entrySize, long chunkSize)`
`FixedSizeAllocator(long startAddress, long totalMemory, long entrySize)`
`FixedSizeAllocator(long startAddress, long totalMemory, long entrySize, long head)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`calloc(int size)`
`long`	`chunkSize()`
`protected int`	`countFreePages()`
`long`	`entrySize()`
`void`	`free(long entry)`
`long`	`freePages()`
`protected long`	`getMemoryFromSystem(long size)`
`long`	`head()`
`long`	`malloc()`
`long`	`malloc(int size)`
`static void`	`relocate(long currentPtr, long delta)`
`long`	`startAddress()`
`long`	`totalMemory()`
`long`	`totalPages()`
`long`	`usedMemory()`
`long`	`usedPages()`
`void`	`verify()`	Verify the layout of the heap.

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

Field Detail

headOffset
```
protected static final long headOffset
```

head
```
protected volatile long head
```

usedPages
```
protected AtomicLong usedPages
```

startAddress
```
protected final long startAddress
```

entrySize
```
protected final long entrySize
```

chunkSize
```
protected final long chunkSize
```

totalMemory
```
protected long totalMemory
```

totalPages
```
protected long totalPages
```

Constructor Detail

FixedSizeAllocator

public FixedSizeAllocator(long entrySize,
                          long chunkSize)

FixedSizeAllocator

public FixedSizeAllocator(long startAddress,
                          long totalMemory,
                          long entrySize)

FixedSizeAllocator

public FixedSizeAllocator(long startAddress,
                          long totalMemory,
                          long entrySize,
                          long head)

Method Detail

relocate

public static void relocate(long currentPtr,
                            long delta)

head
```
public long head()
```

countFreePages
```
protected int countFreePages()
```

entrySize
```
public long entrySize()
```

chunkSize
```
public long chunkSize()
```

startAddress
```
public long startAddress()
```

totalMemory
```
public long totalMemory()
```

malloc
```
public long malloc()
```

malloc
```
public long malloc(int size)
```
Specified by:

malloc in interface Allocator

calloc
```
public long calloc(int size)
```
Specified by:

calloc in interface Allocator

free
```
public void free(long entry)
```
Specified by:

free in interface Allocator

verify
```
public void verify()
```
Description copied from interface: Allocator

Verify the layout of the heap. Expensive operation, used only for debugging purposes.

Specified by:

verify in interface Allocator

getMemoryFromSystem

protected long getMemoryFromSystem(long size)

usedPages
```
public long usedPages()
```

totalPages
```
public long totalPages()
```

freePages
```
public long freePages()
```

usedMemory
```
public long usedMemory()
```

Class FixedSizeAllocator

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

headOffset

head

usedPages

startAddress

entrySize

chunkSize

totalMemory

totalPages

Constructor Detail

FixedSizeAllocator

FixedSizeAllocator

FixedSizeAllocator

Method Detail

relocate

head

countFreePages

entrySize

chunkSize

startAddress

totalMemory

malloc

malloc

calloc

free

verify

getMemoryFromSystem

usedPages

totalPages

freePages

usedMemory