Modifier and Type	Class and Description
private static class	PageManager.SingletonHolder
pack-priv static class	PageManager.Unix
pack-priv static class	PageManager.Windows

Modifier and Type	Field and Description
private final Foreign	foreign
private int	pageSize
public static final int	PROT_EXEC The memory should be executable
public static final int	PROT_READ The memory should be readable
public static final int	PROT_WRITE The memory should be writable

Access	Constructor and Description
public	PageManager()

Method Summary

Modifier and Type	Method and Description
public abstract long	Returns: The native address of the allocated memory. allocatePages(int The number of pages to allocate. npages, int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. protection) Allocates native memory pages.
private long	calculatePageSize()
public abstract void	freePages(long The memory address as returned from `allocatePages` address, int The number of pages to free. npages) Free pages allocated via `allocatePages`
public static PageManager	Returns: An instance of `PageManager` getInstance() Gets the page manager for the current platform.
public final long	Returns: The size of a page on the current system, in bytes. pageSize() Gets the system page size.
public abstract void	protectPages(long The start of the memory region. address, int The number of pages to protect. npages, int The protection mask. protection) Sets the protection mask on a memory region.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

foreign	back to summary
private final Foreign foreign Annotations @SuppressWarnings:UnusedDeclaration

pageSize	back to summary
private int pageSize

PROT_EXEC	back to summary
public static final int PROT_EXEC The memory should be executable

PROT_READ	back to summary
public static final int PROT_READ The memory should be readable

PROT_WRITE	back to summary
public static final int PROT_WRITE The memory should be writable

PageManager	back to summary
public PageManager()

Method Detail

allocatePages back to summary

allocatePages	back to summary
public abstract long allocatePages(int npages, int protection) Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is `npages` * `pageSize`. Parameters npages:int The number of pages to allocate. protection:int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. Returns:long The native address of the allocated memory.

public abstract long allocatePages(int npages, int protection)

Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is npages * pageSize.

Parameters

npages:int: The number of pages to allocate.
protection:int: The initial protection for the page. This must be a bitmask of PROT_READ, PROT_WRITE and PROT_EXEC.

Returns:long

The native address of the allocated memory.

calculatePageSize	back to summary
private long calculatePageSize()

freePages back to summary

freePages	back to summary
public abstract void freePages(long address, int npages) Free pages allocated via `allocatePages` Parameters address:long The memory address as returned from `allocatePages` npages:int The number of pages to free.

public abstract void freePages(long address, int npages)

Free pages allocated via allocatePages

Parameters

address:long: The memory address as returned from allocatePages
npages:int: The number of pages to free.

getInstance back to summary

getInstance	back to summary
public static PageManager getInstance() Gets the page manager for the current platform. Returns:PageManager An instance of `PageManager`

public static PageManager getInstance()

Gets the page manager for the current platform.

Returns:PageManager: An instance of PageManager

pageSize	back to summary
public final long pageSize() Gets the system page size. Returns:long The size of a page on the current system, in bytes.

pageSize

back to summary

public final long pageSize()

Gets the system page size.

Returns:long: The size of a page on the current system, in bytes.

protectPages	back to summary
public abstract void protectPages(long address, int npages, int protection) Sets the protection mask on a memory region. Parameters address:long The start of the memory region. npages:int The number of pages to protect. protection:int The protection mask.

protectPages

back to summary

public abstract void protectPages(long address, int npages, int protection)

Sets the protection mask on a memory region.

Parameters

address:long: The start of the memory region.
npages:int: The number of pages to protect.
protection:int: The protection mask.

com.kenai.jffi back to summary

private final Class PageManager.SingletonHolder

Class Inheritance

extends Object

java.lang.Object
com.kenai.jffi.PageManager.SingletonHolder

Field Summary

Modifier and Type	Field and Description
public static final PageManager	INSTANCE

Constructor Summary

Access	Constructor and Description
private	SingletonHolder()

Method Summary

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

INSTANCE	back to summary
public static final PageManager INSTANCE

Constructor Detail

SingletonHolder	back to summary
private SingletonHolder()

com.kenai.jffi back to summary

pack-priv final Class PageManager.Unix

Class Inheritance

extends PageManager

java.lang.Object
com.kenai.jffi.PageManager
com.kenai.jffi.PageManager.Unix

Field Summary

Inherited from com.kenai.jffi.PageManager:: PROT_EXEC PROT_READ PROT_WRITE

Constructor Summary

Access	Constructor and Description
pack-priv	Unix()

Method Summary

Modifier and Type	Method and Description
public long	allocatePages(int The number of pages to allocate. npages, int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. protection) Implements abstract com.kenai.jffi.PageManager.allocatePages. Allocates native memory pages.
public void	freePages(long The memory address as returned from `allocatePages` address, int The number of pages to free. npages) Implements abstract com.kenai.jffi.PageManager.freePages. Free pages allocated via `allocatePages`
public void	protectPages(long The start of the memory region. address, int The number of pages to protect. npages, int The protection mask. protection) Implements abstract com.kenai.jffi.PageManager.protectPages. Sets the protection mask on a memory region.

Inherited from com.kenai.jffi.PageManager:: getInstance pageSize

Constructor Detail

Unix	back to summary
pack-priv Unix()

Method Detail

allocatePages back to summary

allocatePages	back to summary
public long allocatePages(int npages, int protection) Implements abstract com.kenai.jffi.PageManager.allocatePages. Doc from com.kenai.jffi.PageManager.allocatePages. Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is `npages` * `pageSize`. Parameters npages:int The number of pages to allocate. protection:int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. Returns:long The native address of the allocated memory. Annotations @Override

public long allocatePages(int npages, int protection)

Implements abstract com.kenai.jffi.PageManager.allocatePages.

Doc from com.kenai.jffi.PageManager.allocatePages.

Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is npages * pageSize.

Parameters

npages:int: The number of pages to allocate.
protection:int: The initial protection for the page. This must be a bitmask of PROT_READ, PROT_WRITE and PROT_EXEC.

Returns:long

The native address of the allocated memory.

Annotations

@Override

freePages back to summary

freePages	back to summary
public void freePages(long address, int npages) Implements abstract com.kenai.jffi.PageManager.freePages. Doc from com.kenai.jffi.PageManager.freePages. Free pages allocated via `allocatePages` Parameters address:long The memory address as returned from `allocatePages` npages:int The number of pages to free. Annotations @Override

public void freePages(long address, int npages)

Implements abstract com.kenai.jffi.PageManager.freePages.

Doc from com.kenai.jffi.PageManager.freePages.

Free pages allocated via allocatePages

Parameters

address:long: The memory address as returned from allocatePages
npages:int: The number of pages to free.

Annotations

@Override

protectPages	back to summary
public void protectPages(long address, int npages, int protection) Implements abstract com.kenai.jffi.PageManager.protectPages. Doc from com.kenai.jffi.PageManager.protectPages. Sets the protection mask on a memory region. Parameters address:long The start of the memory region. npages:int The number of pages to protect. protection:int The protection mask. Annotations @Override

protectPages

back to summary

public void protectPages(long address, int npages, int protection)

Implements abstract com.kenai.jffi.PageManager.protectPages.

Doc from com.kenai.jffi.PageManager.protectPages.

Sets the protection mask on a memory region.

Parameters

address:long: The start of the memory region.
npages:int: The number of pages to protect.
protection:int: The protection mask.

Annotations

@Override

com.kenai.jffi back to summary

pack-priv final Class PageManager.Windows

Class Inheritance

extends PageManager

java.lang.Object
com.kenai.jffi.PageManager
com.kenai.jffi.PageManager.Windows

Field Summary

Inherited from com.kenai.jffi.PageManager:: PROT_EXEC PROT_READ PROT_WRITE

Constructor Summary

Access	Constructor and Description
public	Windows()

Method Summary

Modifier and Type	Method and Description
public long	allocatePages(int The number of pages to allocate. pageCount, int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. protection) Implements abstract com.kenai.jffi.PageManager.allocatePages. Allocates native memory pages.
public void	freePages(long The memory address as returned from `allocatePages` address, int The number of pages to free. pageCount) Implements abstract com.kenai.jffi.PageManager.freePages. Free pages allocated via `allocatePages`
public void	protectPages(long The start of the memory region. address, int The number of pages to protect. pageCount, int The protection mask. protection) Implements abstract com.kenai.jffi.PageManager.protectPages. Sets the protection mask on a memory region.
private static int	w32prot(int p)

Inherited from com.kenai.jffi.PageManager:: getInstance pageSize

Constructor Detail

Windows	back to summary
public Windows()

Method Detail

allocatePages back to summary

allocatePages	back to summary
public long allocatePages(int pageCount, int protection) Implements abstract com.kenai.jffi.PageManager.allocatePages. Doc from com.kenai.jffi.PageManager.allocatePages. Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is `npages` * `pageSize`. Parameters pageCount:int The number of pages to allocate. protection:int The initial protection for the page. This must be a bitmask of `PROT_READ`, `PROT_WRITE` and `PROT_EXEC`. Returns:long The native address of the allocated memory. Annotations @Override

public long allocatePages(int pageCount, int protection)

Implements abstract com.kenai.jffi.PageManager.allocatePages.

Doc from com.kenai.jffi.PageManager.allocatePages.

Allocates native memory pages. The memory allocated is aligned on a page boundary, and the size of the allocated memory is npages * pageSize.

Parameters

pageCount:int: The number of pages to allocate.
protection:int: The initial protection for the page. This must be a bitmask of PROT_READ, PROT_WRITE and PROT_EXEC.

Returns:long

The native address of the allocated memory.

Annotations

@Override

freePages back to summary

freePages	back to summary
public void freePages(long address, int pageCount) Implements abstract com.kenai.jffi.PageManager.freePages. Doc from com.kenai.jffi.PageManager.freePages. Free pages allocated via `allocatePages` Parameters address:long The memory address as returned from `allocatePages` pageCount:int The number of pages to free. Annotations @Override

public void freePages(long address, int pageCount)

Implements abstract com.kenai.jffi.PageManager.freePages.

Doc from com.kenai.jffi.PageManager.freePages.

Free pages allocated via allocatePages

Parameters

address:long: The memory address as returned from allocatePages
pageCount:int: The number of pages to free.

Annotations

@Override

protectPages	back to summary
public void protectPages(long address, int pageCount, int protection) Implements abstract com.kenai.jffi.PageManager.protectPages. Doc from com.kenai.jffi.PageManager.protectPages. Sets the protection mask on a memory region. Parameters address:long The start of the memory region. pageCount:int The number of pages to protect. protection:int The protection mask. Annotations @Override

protectPages

back to summary

public void protectPages(long address, int pageCount, int protection)

Implements abstract com.kenai.jffi.PageManager.protectPages.

Doc from com.kenai.jffi.PageManager.protectPages.

Sets the protection mask on a memory region.

Parameters

address:long: The start of the memory region.
pageCount:int: The number of pages to protect.
protection:int: The protection mask.

Annotations

@Override

w32prot	back to summary
private static int w32prot(int p)

public abstract Class PageManager

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class PageManager.SingletonHolder

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

pack-priv final Class PageManager.Unix

Field Summary

Constructor Summary

Method Summary

Constructor Detail

Method Detail

pack-priv final Class PageManager.Windows

Field Summary

Constructor Summary

Method Summary

Constructor Detail

Method Detail