java.lang.Object
- de.gsi.math.utils.ConcurrencyUtils

```
public class ConcurrencyUtils
extends java.lang.Object
```
Concurrency utilities.

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

Constructor Summary

Constructors
Constructor Description

ConcurrencyUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`extendDimension(int x)`
`static int`	`getNumberOfProcessors()`	Returns the number of available processors
`static int`	`getNumberOfThreads()`	Returns the current number of threads.
`static int`	`getThreadsBeginN_1D()`	Returns the minimal size of 1D data for which threads are used.
`static int`	`getThreadsBeginN_1D_FFT_2Threads()`	Returns the minimal size of 1D data for which two threads are used.
`static int`	`getThreadsBeginN_1D_FFT_4Threads()`	Returns the minimal size of 1D data for which four threads are used.
`static int`	`getThreadsBeginN_2D()`	Returns the minimal size of 2D data for which threads are used.
`static int`	`getThreadsBeginN_3D()`	Returns the minimal size of 3D data for which threads are used.
`static boolean`	`isForceThreads()`
`static boolean`	`isPowerOf2(int n)`	Checks if n is a power-of-two number
`static int`	`nextExp2(int n)`
`static int`	`nextPow2(int x)`	Returns the closest power of two greater than or equal to x.
`static int`	`prevPow2(int x)`	Returns the closest power of two less than or equal to x
`static void`	`resetThreadsBeginN()`	Resets the minimal size of 1D, 2D and 3D data for which threads are used.
`static void`	`resetThreadsBeginN_FFT()`	Resets the minimal size of 1D data for which two and four threads are used.
`static void`	`setForceThreads(boolean forceThreads)`
`static void`	`setNumberOfThreads(int n)`	Sets the number of threads
`static void`	`setThreadsBeginN_1D(int n)`	Sets the minimal size of 1D data for which threads are used.
`static void`	`setThreadsBeginN_1D_FFT_2Threads(int n)`	Sets the minimal size of 1D data for which two threads are used.
`static void`	`setThreadsBeginN_1D_FFT_4Threads(int n)`	Sets the minimal size of 1D data for which four threads are used.
`static void`	`setThreadsBeginN_2D(int n)`	Sets the minimal size of 2D data for which threads are used.
`static void`	`setThreadsBeginN_3D(int n)`	Sets the minimal size of 3D data for which threads are used.
`static void`	`sleep(long millis)`	Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds.
`static java.util.concurrent.Future<?>`	`submit(java.lang.Runnable task)`	Submits a Runnable task for execution and returns a Future representing that task.
`static <T> java.util.concurrent.Future<T>`	`submit(java.util.concurrent.Callable<T> task)`	Submits a value-returning task for execution and returns a Future representing the pending results of the task.
`static void`	`waitForCompletion(java.util.concurrent.Future<?>[] futures)`	Waits for all threads to complete computation.

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

- Constructor Detail
  - ConcurrencyUtils
```
public ConcurrencyUtils()
```
- Method Detail
  - extendDimension
```
public static int extendDimension(int x)
```
  - getNumberOfProcessors
```
public static int getNumberOfProcessors()
```
    Returns the number of available processors
    
    Returns:
    
    number of available processors
  - getNumberOfThreads
```
public static int getNumberOfThreads()
```
    Returns the current number of threads.
    
    Returns:
    
    the current number of threads.
  - getThreadsBeginN_1D
```
public static int getThreadsBeginN_1D()
```
    Returns the minimal size of 1D data for which threads are used.
    
    Returns:
    
    the minimal size of 1D data for which threads are used
  - getThreadsBeginN_1D_FFT_2Threads
```
public static int getThreadsBeginN_1D_FFT_2Threads()
```
    Returns the minimal size of 1D data for which two threads are used.
    
    Returns:
    
    the minimal size of 1D data for which two threads are used
  - getThreadsBeginN_1D_FFT_4Threads
```
public static int getThreadsBeginN_1D_FFT_4Threads()
```
    Returns the minimal size of 1D data for which four threads are used.
    
    Returns:
    
    the minimal size of 1D data for which four threads are used
  - getThreadsBeginN_2D
```
public static int getThreadsBeginN_2D()
```
    Returns the minimal size of 2D data for which threads are used.
    
    Returns:
    
    the minimal size of 2D data for which threads are used
  - getThreadsBeginN_3D
```
public static int getThreadsBeginN_3D()
```
    Returns the minimal size of 3D data for which threads are used.
    
    Returns:
    
    the minimal size of 3D data for which threads are used
  - isForceThreads
```
public static boolean isForceThreads()
```
    Returns:
    
    the forceThreads
  - isPowerOf2
```
public static boolean isPowerOf2(int n)
```
    Checks if n is a power-of-two number
    
    Parameters:
    
    n - input parameter
    
    Returns:
    
    true if n is power of 2
  - nextExp2
```
public static int nextExp2(int n)
```
  - nextPow2
```
public static int nextPow2(int x)
```
    Returns the closest power of two greater than or equal to x.
    
    Parameters:
    
    x - input parameter
    
    Returns:
    
    the closest power of two greater than or equal to x
  - prevPow2
```
public static int prevPow2(int x)
```
    Returns the closest power of two less than or equal to x
    
    Parameters:
    
    x - input parameter
    
    Returns:
    
    the closest power of two less then or equal to x
  - resetThreadsBeginN
```
public static void resetThreadsBeginN()
```
    Resets the minimal size of 1D, 2D and 3D data for which threads are used.
  - resetThreadsBeginN_FFT
```
public static void resetThreadsBeginN_FFT()
```
    Resets the minimal size of 1D data for which two and four threads are used.
  - setForceThreads
```
public static void setForceThreads(boolean forceThreads)
```
    Parameters:
    
    forceThreads - the forceThreads to set
  - setNumberOfThreads
```
public static void setNumberOfThreads(int n)
```
    Sets the number of threads
    
    Parameters:
    
    n - number of requested threads
  - setThreadsBeginN_1D
```
public static void setThreadsBeginN_1D(int n)
```
    Sets the minimal size of 1D data for which threads are used.
    
    Parameters:
    
    n - the minimal size of 1D data for which threads are used
  - setThreadsBeginN_1D_FFT_2Threads
```
public static void setThreadsBeginN_1D_FFT_2Threads(int n)
```
    Sets the minimal size of 1D data for which two threads are used.
    
    Parameters:
    
    n - the minimal size of 1D data for which two threads are used
  - setThreadsBeginN_1D_FFT_4Threads
```
public static void setThreadsBeginN_1D_FFT_4Threads(int n)
```
    Sets the minimal size of 1D data for which four threads are used.
    
    Parameters:
    
    n - the minimal size of 1D data for which four threads are used
  - setThreadsBeginN_2D
```
public static void setThreadsBeginN_2D(int n)
```
    Sets the minimal size of 2D data for which threads are used.
    
    Parameters:
    
    n - the minimal size of 2D data for which threads are used
  - setThreadsBeginN_3D
```
public static void setThreadsBeginN_3D(int n)
```
    Sets the minimal size of 3D data for which threads are used.
    
    Parameters:
    
    n - the minimal size of 3D data for which threads are used
  - sleep
```
public static void sleep(long millis)
```
    Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds.
    
    Parameters:
    
    millis - sleep duration in [ms]
  - submit
```
public static <T> java.util.concurrent.Future<T> submit(java.util.concurrent.Callable<T> task)
```
    Submits a value-returning task for execution and returns a Future representing the pending results of the task.
    
    Type Parameters:
    
    T - value type of callable
    
    Parameters:
    
    task - task for execution
    
    Returns:
    
    a handle to the task submitted for execution
  - submit
```
public static java.util.concurrent.Future<?> submit(java.lang.Runnable task)
```
    Submits a Runnable task for execution and returns a Future representing that task.
    
    Parameters:
    
    task - task for execution
    
    Returns:
    
    a handle to the task submitted for execution
  - waitForCompletion
```
public static void waitForCompletion(java.util.concurrent.Future<?>[] futures)
```
    Waits for all threads to complete computation.
    
    Parameters:
    
    futures - handles to running threads

Class ConcurrencyUtils

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ConcurrencyUtils

Method Detail

extendDimension

getNumberOfProcessors

getNumberOfThreads

getThreadsBeginN_1D

getThreadsBeginN_1D_FFT_2Threads

getThreadsBeginN_1D_FFT_4Threads

getThreadsBeginN_2D

getThreadsBeginN_3D

isForceThreads

isPowerOf2

nextExp2

nextPow2

prevPow2

resetThreadsBeginN

resetThreadsBeginN_FFT

setForceThreads

setNumberOfThreads

setThreadsBeginN_1D

setThreadsBeginN_1D_FFT_2Threads

setThreadsBeginN_1D_FFT_4Threads

setThreadsBeginN_2D

setThreadsBeginN_3D

sleep

submit

submit

waitForCompletion