TransientNativeMemory (jnr-ffi 0.7.10 API)

java.lang.Object
- jnr.ffi.Pointer
- - jnr.ffi.provider.AbstractMemoryIO
  - - jnr.ffi.provider.jffi.TransientNativeMemory

public class TransientNativeMemory
extends AbstractMemoryIO

Field Summary

Fields
Modifier and Type Field and Description

protected long address

Fields
Modifier and Type	Field and Description
`protected long`	`address`

Method Summary

Methods
Modifier and Type	Method and Description
`long`	`address()` Gets the native address of this memory object (optional operation).
`static jnr.ffi.provider.jffi.DirectMemoryIO`	`allocate(Runtime runtime, int size, int align, boolean clear)`
`Object`	`array()`
`int`	`arrayLength()`
`int`	`arrayOffset()`
`void`	`dispose()`
`boolean`	`equals(Object obj)`
`void`	`get(long offset, byte[] dst, int off, int len)` Bulk get method for multiple `byte` values.
`void`	`get(long offset, double[] dst, int off, int len)` Bulk get method for multiple `double` values.
`void`	`get(long offset, float[] dst, int off, int len)` Bulk get method for multiple `float` values.
`void`	`get(long offset, int[] dst, int off, int len)` Bulk get method for multiple `int` values.
`void`	`get(long offset, long[] dst, int off, int len)` Bulk get method for multiple `long` values.
`void`	`get(long offset, short[] dst, int off, int len)` Bulk get method for multiple `short` values.
`byte`	`getByte(long offset)` Reads an `byte` (8 bit) value at the given offset.
`double`	`getDouble(long offset)` Reads a `double` (64 bit) value at the given offset.
`float`	`getFloat(long offset)` Reads a `float` (32 bit) value at the given offset.
`int`	`getInt(long offset)` Reads an `int` (32 bit) value at the given offset.
`long`	`getLongLong(long offset)` Reads a `long` (64 bit) value at the given offset.
`Pointer`	`getPointer(long offset)` Reads an `Pointer` value at the given offset.
`Pointer`	`getPointer(long offset, long size)` Reads an `Pointer` value at the given offset.
`short`	`getShort(long offset)` Reads a `short` (16 bit) value at the given offset.
`String`	`getString(long offset)` Reads an `String` value at the given offset.
`String`	`getString(long offset, int maxLength, Charset cs)` Reads a `String` value at the given offset, using a specific `Charset`
`boolean`	`hasArray()`
`int`	`hashCode()`
`int`	`indexOf(long offset, byte value, int maxlen)` Returns the location of a byte value within the memory area represented by this `Pointer`.
`boolean`	`isDirect()` Indicates whether or not this memory object represents a native memory address.
`void`	`put(long offset, byte[] src, int off, int len)` Bulk put method for multiple `byte` values.
`void`	`put(long offset, double[] src, int off, int len)` Bulk put method for multiple `double` values.
`void`	`put(long offset, float[] src, int off, int len)` Bulk put method for multiple `float` values.
`void`	`put(long offset, int[] src, int off, int len)` Bulk put method for multiple `int` values.
`void`	`put(long offset, long[] src, int off, int len)` Bulk put method for multiple `long` values.
`void`	`put(long offset, short[] src, int off, int len)` Bulk put method for multiple `short` values.
`void`	`putByte(long offset, byte value)` Writes a `byte` (8 bit) value at the given offset.
`void`	`putDouble(long offset, double value)` Writes a `double` (64 bit, double precision) value at the given offset.
`void`	`putFloat(long offset, float value)` Writes a `float` (32 bit, single precision) value at the given offset.
`void`	`putInt(long offset, int value)` Writes an `int` (32 bit) value at the given offset.
`void`	`putLongLong(long offset, long value)` Writes a `long` (64 bit) value at the given offset.
`void`	`putPointer(long offset, Pointer value)` Writes a `Pointer` value at the given offset.
`void`	`putShort(long offset, short value)` Writes a `short` (16 bit) value at the given offset.
`void`	`putString(long offset, String string, int maxLength, Charset cs)` Writes a `String` value at the given offset, using a specific `Charset`
`void`	`putZeroTerminatedByteArray(long offset, byte[] src, int off, int len)`
`void`	`setMemory(long offset, long size, byte value)` Sets the value of each byte in the memory area represented by this `Pointer`.
`long`	`size()` Gets the size of this memory object (optional operation).
`String`	`toString()`

Methods inherited from class jnr.ffi.provider.AbstractMemoryIO
checkBounds, checkBounds, getAddress, getInt, getLong, getNativeLong, getRuntime, indexOf, putAddress, putAddress, putInt, putLong, putNativeLong, slice, slice, transferFrom, transferTo

Methods inherited from class jnr.ffi.Pointer
get, getNullTerminatedPointerArray, getNullTerminatedStringArray, newIntPointer, put, wrap, wrap, wrap

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

- Field Detail
  - address
```
protected final long address
```
- Method Detail
  - allocate
```
public static jnr.ffi.provider.jffi.DirectMemoryIO allocate(Runtime runtime,
                                            int size,
                                            int align,
                                            boolean clear)
```
  - size
```
public long size()
```
    Description copied from class: Pointer
    
    Gets the size of this memory object (optional operation).
    
    Returns:
    the size of the memory area this Pointer points to. If the size is unknown, Long.MAX_VALUE is returned}.
  - hashCode
```
public int hashCode()
```
  - equals
```
public boolean equals(Object obj)
```
  - toString
```
public String toString()
```
  - dispose
```
public final void dispose()
```
  - address
```
public final long address()
```
    Description copied from class: Pointer
    
    Gets the native address of this memory object (optional operation).
    
    Specified by:
    
    address in class Pointer
    
    Returns:
    the native address of this memory object. If this object is not a native memory address, an address of zero is returned.
  - hasArray
```
public boolean hasArray()
```
    Specified by:
    
    hasArray in class Pointer
  - array
```
public Object array()
```
    Specified by:
    
    array in class Pointer
  - arrayOffset
```
public int arrayOffset()
```
    Specified by:
    
    arrayOffset in class Pointer
  - arrayLength
```
public int arrayLength()
```
    Specified by:
    
    arrayLength in class Pointer
  - getByte
```
public final byte getByte(long offset)
```
    Description copied from class: Pointer
    
    Reads an byte (8 bit) value at the given offset.
    
    Specified by:
    
    getByte in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the byte value at the offset.
  - getShort
```
public final short getShort(long offset)
```
    Description copied from class: Pointer
    
    Reads a short (16 bit) value at the given offset.
    
    Specified by:
    
    getShort in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the short value at the offset.
  - getInt
```
public final int getInt(long offset)
```
    Description copied from class: Pointer
    
    Reads an int (32 bit) value at the given offset.
    
    Specified by:
    
    getInt in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the int value contained in the memory at the offset.
  - getLongLong
```
public final long getLongLong(long offset)
```
    Description copied from class: Pointer
    
    Reads a long (64 bit) value at the given offset.
    
    Specified by:
    
    getLongLong in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the long value at the offset.
  - getFloat
```
public final float getFloat(long offset)
```
    Description copied from class: Pointer
    
    Reads a float (32 bit) value at the given offset.
    
    Specified by:
    
    getFloat in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the float value at the offset.
  - getDouble
```
public final double getDouble(long offset)
```
    Description copied from class: Pointer
    
    Reads a double (64 bit) value at the given offset.
    
    Specified by:
    
    getDouble in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the double value at the offset.
  - putByte
```
public final void putByte(long offset,
           byte value)
```
    Description copied from class: Pointer
    
    Writes a byte (8 bit) value at the given offset.
    
    Specified by:
    
    putByte in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the byte value to be written.
  - putShort
```
public final void putShort(long offset,
            short value)
```
    Description copied from class: Pointer
    
    Writes a short (16 bit) value at the given offset.
    
    Specified by:
    
    putShort in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the short value to be written.
  - putInt
```
public final void putInt(long offset,
          int value)
```
    Description copied from class: Pointer
    
    Writes an int (32 bit) value at the given offset.
    
    Specified by:
    
    putInt in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the int value to be written.
  - putLongLong
```
public final void putLongLong(long offset,
               long value)
```
    Description copied from class: Pointer
    
    Writes a long (64 bit) value at the given offset.
    
    Specified by:
    
    putLongLong in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the long value to be written.
  - putFloat
```
public final void putFloat(long offset,
            float value)
```
    Description copied from class: Pointer
    
    Writes a float (32 bit, single precision) value at the given offset.
    
    Specified by:
    
    putFloat in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the float value to be written.
  - putDouble
```
public final void putDouble(long offset,
             double value)
```
    Description copied from class: Pointer
    
    Writes a double (64 bit, double precision) value at the given offset.
    
    Specified by:
    
    putDouble in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the double value to be written.
  - get
```
public final void get(long offset,
       byte[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple byte values. This method reads multiple byte values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - the array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       byte[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple byte values. This method writes multiple byte values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - get
```
public final void get(long offset,
       short[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple short values. This method reads multiple short values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - The array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       short[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple short values. This method writes multiple short values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - get
```
public final void get(long offset,
       int[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple int values. This method reads multiple int values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - The array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       int[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple int values. This method writes multiple int values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - get
```
public final void get(long offset,
       long[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple long values. This method reads multiple long values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - The array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       long[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple long values. This method writes multiple long values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - get
```
public final void get(long offset,
       float[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple float values. This method reads multiple float values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - The array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       float[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple float values. This method writes multiple float values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - get
```
public final void get(long offset,
       double[] dst,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple double values. This method reads multiple double values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    dst - The array into which values are to be stored.
    off - the start index in the dst array to begin storing the values.
    len - the number of values to be read.
  - put
```
public final void put(long offset,
       double[] src,
       int off,
       int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple double values. This method writes multiple double values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    src - the array to get values from.
    off - the start index in the dst array to begin reading values.
    len - the number of values to be written.
  - getPointer
```
public Pointer getPointer(long offset)
```
    Description copied from class: Pointer
    
    Reads an Pointer value at the given offset.
    
    Specified by:
    
    getPointer in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the Pointer value read from memory.
  - getPointer
```
public Pointer getPointer(long offset,
                 long size)
```
    Description copied from class: Pointer
    
    Reads an Pointer value at the given offset.
    
    Specified by:
    
    getPointer in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    size - the maximum size of the memory location the returned Pointer represents.
    
    Returns:
    the Pointer value read from memory.
  - putPointer
```
public void putPointer(long offset,
              Pointer value)
```
    Description copied from class: Pointer
    
    Writes a Pointer value at the given offset.
    
    Specified by:
    
    putPointer in class Pointer
    
    Parameters:
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    value - the Pointer value to be written to memory.
  - getString
```
public String getString(long offset)
```
    Description copied from class: Pointer
    
    Reads an String value at the given offset.
    
    Specified by:
    
    getString in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    the String value read from memory.
  - getString
```
public String getString(long offset,
               int maxLength,
               Charset cs)
```
    Description copied from class: Pointer
    
    Reads a String value at the given offset, using a specific Charset
    
    Specified by:
    
    getString in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    maxLength - the maximum size of memory to search for a NUL byte.
    cs - the Charset to use to decode the string.
    
    Returns:
    the String value read from memory.
  - putString
```
public void putString(long offset,
             String string,
             int maxLength,
             Charset cs)
```
    Description copied from class: Pointer
    
    Writes a String value at the given offset, using a specific Charset
    
    Specified by:
    
    putString in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory this Pointer represents at which the value will be written.
    maxLength - the maximum size of memory to use to store the string.
    cs - the Charset to use to decode the string.
  - putZeroTerminatedByteArray
```
public void putZeroTerminatedByteArray(long offset,
                              byte[] src,
                              int off,
                              int len)
```
  - indexOf
```
public int indexOf(long offset,
          byte value,
          int maxlen)
```
    Description copied from class: Pointer
    
    Returns the location of a byte value within the memory area represented by this Pointer.
    
    Specified by:
    
    indexOf in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory location this Pointer represents to begin searching.
    value - the byte value to locate.
    maxlen - the maximum number of bytes to search for the desired value.
    
    Returns:
    the offset from the start of the search area (i.e. relative to the offset parameter), or -1 if not found.
  - isDirect
```
public final boolean isDirect()
```
    Description copied from class: Pointer
    
    Indicates whether or not this memory object represents a native memory address.
    Memory objects can be either direct (representing native memory), or non-direct (representing java heap memory).
    Non-direct memory objects can still be passed to native functions as pointer (void *, char *, etc) parameters, but the java memory will first be copied to a temporary native memory area. The temporary memory area will then be used as the parameter value for the call. If needed, the java memory will be automatically reloaded from the temporary native memory after the native function returns.
    Note: the transient nature of the temporary memory allocated for non-direct memory means native functions which store the address value passed to them will fail in unpredictable ways when using non-direct memory. You will need to explicitly allocate direct memory to use those types of functions.
    
    Specified by:
    
    isDirect in class Pointer
    
    Returns:
    true if, and only if, this memory object represents a native address.
  - setMemory
```
public final void setMemory(long offset,
             long size,
             byte value)
```
    Description copied from class: Pointer
    
    Sets the value of each byte in the memory area represented by this Pointer. to a specified value.
    
    Specified by:
    
    setMemory in class Pointer
    
    Parameters:
    offset - the offset from the start of the memory location this Pointer represents to begin writing to.
    size - the number of bytes to set to the value.
    value - the value to set each byte to.

Class TransientNativeMemory

Field Summary

Method Summary

Methods inherited from class jnr.ffi.provider.AbstractMemoryIO

Methods inherited from class jnr.ffi.Pointer

Methods inherited from class java.lang.Object

Field Detail

address

Method Detail

allocate

size

hashCode

equals

toString

dispose

address

hasArray

array

arrayOffset

arrayLength

getByte

getShort

getInt

getLongLong

getFloat

getDouble

putByte

putShort

putInt

putLongLong

putFloat

putDouble

get

put

get

put

get

put

get

put

get

put

get

put

getPointer

getPointer

putPointer

getString

getString

putString

putZeroTerminatedByteArray

indexOf

isDirect

setMemory