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jnr.ffi.provider.jffi

public Class TransientNativeMemory

extends DirectMemoryIO
Class Inheritance
Imports
com.kenai.jffi.PageManager, jnr.ffi.util.ref.FinalizablePhantomReference, .FinalizableReferenceQueue, java.lang.ref.Reference, .WeakReference, java.util.Map, java.util.concurrent.ConcurrentHashMap

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static class
TransientNativeMemory.Magazine

Holder for a group of memory allocations.

private static class

Field Summary

Modifier and TypeField and Description
private static final ThreadLocal<TransientNativeMemory.Magazine>
private static final int
private static final Map<TransientNativeMemory.Magazine, Boolean>
referenceSet

Keeps strong references to the magazine until cleanup

private final TransientNativeMemory.Sentinel
private final long
Inherited from jnr.ffi.provider.jffi.DirectMemoryIO:
IO

Constructor Summary

AccessConstructor and Description
pack-priv
TransientNativeMemory(Runtime runtime, TransientNativeMemory.Sentinel sentinel, long address, long size)

Method Summary

Modifier and TypeMethod and Description
private static long
align(long offset, long align)

public static DirectMemoryIO
allocate(Runtime runtime, int size, int align, boolean clear)

public static DirectMemoryIO
allocate(Runtime runtime, long size, int align, boolean clear)

public final void
public boolean
equals(Object
the reference object with which to compare.
obj
)

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.equals.

Indicates whether some other object is "equal to" this one.
public int
hashCode()

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.hashCode.

Returns a hash code value for this object.
public long
size()

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.size.

Gets the size of this memory object in bytes (optional operation).
Inherited from jnr.ffi.provider.jffi.DirectMemoryIO:
arrayarrayLengtharrayOffsetgetgetgetgetgetgetgetBytegetDoublegetFloatgetIntgetLongLonggetPointergetPointergetShortgetStringgetStringhasArrayindexOfputputputputputputputByteputDoubleputFloatputIntputLongLongputPointerputShortputStringputZeroTerminatedByteArraysetMemorytransferFromtransferTo

Field Detail

currentMagazineback to summary
private static final ThreadLocal<TransientNativeMemory.Magazine> currentMagazine
PAGES_PER_MAGAZINEback to summary
private static final int PAGES_PER_MAGAZINE
referenceSetback to summary
private static final Map<TransientNativeMemory.Magazine, Boolean> referenceSet

Keeps strong references to the magazine until cleanup

Annotations
@SuppressWarnings:MismatchedQueryAndUpdateOfCollection
sentinelback to summary
private final TransientNativeMemory.Sentinel sentinel
sizeback to summary
private final long size

Constructor Detail

TransientNativeMemoryback to summary
pack-priv TransientNativeMemory(Runtime runtime, TransientNativeMemory.Sentinel sentinel, long address, long size)

Method Detail

alignback to summary
private static long align(long offset, long align)
allocateback to summary
public static DirectMemoryIO allocate(Runtime runtime, int size, int align, boolean clear)
allocateback to summary
public static DirectMemoryIO allocate(Runtime runtime, long size, int align, boolean clear)
disposeback to summary
public final void dispose()
equalsback to summary
public boolean equals(Object obj)

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
obj:Object

the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations
@Override
hashCodeback to summary
public int hashCode()

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object

Annotations
@Override
sizeback to summary
public long size()

Overrides jnr.ffi.provider.jffi.DirectMemoryIO.size.

Doc from jnr.ffi.Pointer.size.

Gets the size of this memory object in bytes (optional operation).

Returns:long

the size of the memory area this Pointer points to. If the size is unknown, java.lang.Long#MAX_VALUE is returned}.

Annotations
@Override
jnr.ffi.provider.jffi back to summary

private final Class TransientNativeMemory.Magazine

extends FinalizablePhantomReference<TransientNativeMemory.Sentinel>
Class Inheritance

Holder for a group of memory allocations.

Field Summary

Modifier and TypeField and Description
private final long
private long
private final long
private final int
private final PageManager
private final Reference<TransientNativeMemory.Sentinel>

Constructor Summary

AccessConstructor and Description
pack-priv
Magazine(TransientNativeMemory.Sentinel sentinel, PageManager pm, long page, int pageCount)

Method Summary

Modifier and TypeMethod and Description
pack-priv long
allocate(long size, int align)

public final void
finalizeReferent()

Implements jnr.ffi.util.ref.FinalizableReference.finalizeReferent.

Invoked on a background thread after the referent has been garbage collected unless security restrictions prevented starting a background thread, in which case this method is invoked when new references are created.
pack-priv TransientNativeMemory.Sentinel

Field Detail

endback to summary
private final long end
memoryback to summary
private long memory
pageback to summary
private final long page
pageCountback to summary
private final int pageCount
pmback to summary
private final PageManager pm
sentinelReferenceback to summary
private final Reference<TransientNativeMemory.Sentinel> sentinelReference

Constructor Detail

Magazineback to summary
pack-priv Magazine(TransientNativeMemory.Sentinel sentinel, PageManager pm, long page, int pageCount)

Method Detail

allocateback to summary
pack-priv long allocate(long size, int align)
finalizeReferentback to summary
public final void finalizeReferent()

Implements jnr.ffi.util.ref.FinalizableReference.finalizeReferent.

Doc from jnr.ffi.util.ref.FinalizableReference.finalizeReferent.

Invoked on a background thread after the referent has been garbage collected unless security restrictions prevented starting a background thread, in which case this method is invoked when new references are created.

sentinelback to summary
pack-priv TransientNativeMemory.Sentinel sentinel()
jnr.ffi.provider.jffi back to summary

private final Class TransientNativeMemory.Sentinel

extends Object
Class Inheritance

Constructor Summary

AccessConstructor and Description
private

Method Summary

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Constructor Detail

Sentinelback to summary
private Sentinel()