NativeIO (vespajlib 7.514.59 API)

java.lang.Object
- com.yahoo.io.NativeIO

```
public class NativeIO
extends Object
```
Provides functionality only possible through native C library.

Constructor Summary

Constructors
Constructor Description

NativeIO()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`dropFileFromCache(File file)`	Will hint the OS that this is will not be accessed again and should hence be dropped from the buffer cache.
`void`	`dropFileFromCache(FileDescriptor fd)`	Will hint the OS that this is will not be accessed again and should hence be dropped from the buffer cache.
`void`	`dropPartialFileFromCache(FileDescriptor fd, long offset, long len, boolean sync)`	Will hint the OS that data read so far will not be accessed again and should hence be dropped from the buffer cache.
`Throwable`	`getError()`
`boolean`	`valid()`

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

- Constructor Detail
  - NativeIO
```
public NativeIO()
```
- Method Detail
  - valid
```
public boolean valid()
```
  - getError
```
public Throwable getError()
```
  - dropPartialFileFromCache
```
public void dropPartialFileFromCache(FileDescriptor fd,
                                     long offset,
                                     long len,
                                     boolean sync)
```
    Will hint the OS that data read so far will not be accessed again and should hence be dropped from the buffer cache.
    
    Parameters:
    
    fd - The file descriptor to drop from buffer cache.
  - dropFileFromCache
```
public void dropFileFromCache(FileDescriptor fd)
```
    Will hint the OS that this is will not be accessed again and should hence be dropped from the buffer cache.
    
    Parameters:
    
    fd - The file descriptor to drop from buffer cache.
  - dropFileFromCache
```
public void dropFileFromCache(File file)
```
    Will hint the OS that this is will not be accessed again and should hence be dropped from the buffer cache.
    
    Parameters:
    
    file - File to drop from buffer cache