Module openj9.cuda

Package com.ibm.cuda

Class CudaBuffer

java.lang.Object

com.ibm.cuda.CudaBuffer

All Implemented Interfaces:

AutoCloseable

public final class CudaBuffer
extends Object
implements AutoCloseable

The CudaBuffer class represents a region of memory on a specific device.

Data may be transferred between the device and the Java host via the various copyTo or copyFrom methods. A buffer may be filled with a specific pattern through use of one of the fillXxx methods.

When no longer required, a buffer must be closed.

Constructor Summary

Constructors

Constructor	Description
CudaBuffer(CudaDevice device, long byteCount)	Allocates a new region on the specified device of size byteCount bytes.

Method Summary

Modifier and Type	Method	Description
CudaBuffer	atOffset(long fromOffset)	Returns a sub-region of this buffer.
void	close()	Releases the region of device memory backing this buffer.
void	copyFrom(byte[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(byte[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(char[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(char[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(double[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(double[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(float[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(float[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(int[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(int[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(long[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(long[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(short[] array)	Copies all data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(short[] array, int fromIndex, int toIndex)	Copies data from the specified array (on the Java host) to this buffer (on the device).
void	copyFrom(CudaBuffer source, long fromOffset, long toOffset)	Copies data from the specified source buffer (on a device) to this buffer (on the device).
void	copyFrom(ByteBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(CharBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(DoubleBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(FloatBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(IntBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(LongBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyFrom(ShortBuffer source)	Copies data from the specified source buffer (on the Java host) to this buffer (on the device).
void	copyTo(byte[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(byte[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(char[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(char[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(double[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(double[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(float[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(float[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(int[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(int[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(long[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(long[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(short[] array)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(short[] array, int fromIndex, int toIndex)	Copies data from this buffer (on the device) to the specified array (on the Java host).
void	copyTo(ByteBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(CharBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(DoubleBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(FloatBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(IntBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(LongBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	copyTo(ShortBuffer target)	Copies data from this buffer (on the device) to the specified target buffer (on the Java host).
void	fillByte(byte value, long count)	Stores count copies of value in this buffer.
void	fillChar(char value, long count)	Stores count copies of value in this buffer.
void	fillFloat(float value, long count)	Stores count copies of value in this buffer.
void	fillInt(int value, long count)	Stores count copies of value in this buffer.
void	fillShort(short value, long count)	Stores count copies of value in this buffer.
long	getLength()	Returns the length in bytes of this buffer.
CudaBuffer	slice(long fromOffset, long toOffset)	Returns a sub-region of this buffer.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CudaBuffer

public CudaBuffer(CudaDevice device,
 long byteCount)
           throws CudaException

Allocates a new region on the specified device of size byteCount bytes.

Parameters:

device - the device on which the region is to be allocated

byteCount - the allocation size in bytes

Throws:

CudaException - if a CUDA exception occurs

Method Details

atOffset

public CudaBuffer atOffset(long fromOffset)

Returns a sub-region of this buffer. The new buffer begins at the specified offset and extends to the end of this buffer.

Parameters:

fromOffset - the byte offset of the sub-region within this buffer

Returns:

the specified sub-region

Throws:

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the specified offset is negative or larger than the length of this buffer

close

public void close()
           throws CudaException

Releases the region of device memory backing this buffer.

Closing a buffer created via atOffset(long) with a non-zero offset has no effect: the memory is still accessible via the parent buffer which must be closed separately.

Specified by:

close in interface AutoCloseable

Throws:

CudaException - if a CUDA exception occurs

copyFrom

public void copyFrom(byte[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(byte[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(ByteBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(char[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(char[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(CharBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(CudaBuffer source,
 long fromOffset,
 long toOffset)
              throws CudaException

Copies data from the specified source buffer (on a device) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

fromOffset - the source starting offset (inclusive)

toOffset - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if either fromOffset or toOffset is not a legal offset within the source buffer or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(double[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(double[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(DoubleBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(float[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(float[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(FloatBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(int[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(int[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(IntBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(long[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(long[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(LongBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(short[] array)
              throws CudaException

Copies all data from the specified array (on the Java host) to this buffer (on the device). Equivalent to

 copyFrom(array, 0, array.length);
 

Parameters:

array - the source array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(short[] array,
 int fromIndex,
 int toIndex)
              throws CudaException

Copies data from the specified array (on the Java host) to this buffer (on the device). Elements are read from array beginning at fromIndex continuing up to, but excluding, toIndex storing them in the same order in this buffer.

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

array - the source array

fromIndex - the source starting offset (inclusive)

toIndex - the source ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of source bytes is larger than the length of this buffer

copyFrom

public void copyFrom(ShortBuffer source)
              throws CudaException

Copies data from the specified source buffer (on the Java host) to this buffer (on the device). Elements are read from source beginning at position() continuing up to, but excluding, limit() storing them in the same order in this buffer. The source buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the data are to be copied somewhere other than the beginning of this buffer.

Parameters:

source - the source buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of source bytes is larger than the length of this buffer

copyTo

public void copyTo(byte[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(byte[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(ByteBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(char[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(char[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(CharBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(double[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(double[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(DoubleBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(float[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(float[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(FloatBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(int[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(int[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(IntBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(long[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(long[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(LongBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(short[] array)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Equivalent to

 copyTo(array, 0, array.length);
 

Parameters:

array - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(short[] array,
 int fromIndex,
 int toIndex)
            throws CudaException

Copies data from this buffer (on the device) to the specified array (on the Java host). Elements are read starting at the beginning of this buffer and stored in array beginning at fromIndex continuing up to, but excluding, toIndex.

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

array - the destination array

fromIndex - the destination starting offset (inclusive)

toIndex - the destination ending offset (exclusive)

Throws:

CudaException - if a CUDA exception occurs

IllegalArgumentException - if fromIndex > toIndex

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromIndex is negative, toIndex > array.length, or the number of required source bytes is larger than the length of this buffer

copyTo

public void copyTo(ShortBuffer target)
            throws CudaException

Copies data from this buffer (on the device) to the specified target buffer (on the Java host). Elements are read starting at the beginning of this buffer and stored in target beginning at position() continuing up to, but excluding, limit(). The target buffer position is set to limit().

A sub-buffer may be created (see atOffset(long)) when the source data are not located at the beginning of this buffer.

Parameters:

target - the destination buffer

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the number of required source bytes is larger than the length of this buffer

fillByte

public void fillByte(byte value,
 long count)
              throws CudaException

Stores count copies of value in this buffer.

A sub-buffer may be created (see atOffset(long)) when the values are to be stored somewhere other than the beginning of this buffer.

Parameters:

value - the destination array

count - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the space required is larger than the length of this buffer

fillChar

public void fillChar(char value,
 long count)
              throws CudaException

Stores count copies of value in this buffer.

A sub-buffer may be created (see atOffset(long)) when the values are to be stored somewhere other than the beginning of this buffer.

Parameters:

value - the destination array

count - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the space required is larger than the length of this buffer

fillFloat

public void fillFloat(float value,
 long count)
               throws CudaException

Stores count copies of value in this buffer.

A sub-buffer may be created (see atOffset(long)) when the values are to be stored somewhere other than the beginning of this buffer.

Parameters:

value - the destination array

count - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the space required is larger than the length of this buffer

fillInt

public void fillInt(int value,
 long count)
             throws CudaException

Stores count copies of value in this buffer.

A sub-buffer may be created (see atOffset(long)) when the values are to be stored somewhere other than the beginning of this buffer.

Parameters:

value - the destination array

count - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the space required is larger than the length of this buffer

fillShort

public void fillShort(short value,
 long count)
               throws CudaException

Stores count copies of value in this buffer.

A sub-buffer may be created (see atOffset(long)) when the values are to be stored somewhere other than the beginning of this buffer.

Parameters:

value - the destination array

count - the destination array

Throws:

CudaException - if a CUDA exception occurs

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if the space required is larger than the length of this buffer

getLength

public long getLength()

Returns the length in bytes of this buffer.

Returns:

the length in bytes of this buffer

slice

public CudaBuffer slice(long fromOffset,
 long toOffset)

Returns a sub-region of this buffer. The new buffer begins at the specified fromOffset and extends to the specified toOffset (exclusive).

Parameters:

fromOffset - the byte offset of the start of the sub-region within this buffer

toOffset - the byte offset of the end of the sub-region within this buffer

Returns:

the specified sub-region

Throws:

IllegalArgumentException - if fromOffset > toOffset

IllegalStateException - if this buffer has been closed (see close())

IndexOutOfBoundsException - if fromOffset is negative, toOffset > length, or the number of source bytes is larger than the length of this buffer