com.kenai.jffi

Class PageManager.Unix

java.lang.Object

com.kenai.jffi.PageManager

com.kenai.jffi.PageManager.Unix

Enclosing class:

PageManager

static final class PageManager.Unix
extends PageManager

Nested Class Summary

Nested classes/interfaces inherited from class com.kenai.jffi.PageManager

PageManager.Unix, PageManager.Windows

Field Summary

Fields inherited from class com.kenai.jffi.PageManager

PROT_EXEC, PROT_READ, PROT_WRITE

Constructor Summary

Constructors

Constructor and Description
Unix()

Method Summary

Modifier and Type	Method and Description
long	allocatePages(int npages, int protection) Allocates native memory pages.
void	freePages(long address, int npages) Free pages allocated via PageManager.allocatePages(int, int)
void	protectPages(long address, int npages, int protection) Sets the protection mask on a memory region.

Methods inherited from class com.kenai.jffi.PageManager

getInstance, pageSize

Methods inherited from class java.lang.Object

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

Constructor Detail

Unix

Unix()

Method Detail

allocatePages

public long allocatePages(int npages,
                          int protection)

Description copied from class: PageManager

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

Specified by:

allocatePages in class PageManager

Parameters:

npages - The number of pages to allocate.

protection - The initial protection for the page. This must be a bitmask of PageManager.PROT_READ, PageManager.PROT_WRITE and PageManager.PROT_EXEC.

Returns:

The native address of the allocated memory.

freePages

public void freePages(long address,
                      int npages)

Description copied from class: PageManager

Free pages allocated via PageManager.allocatePages(int, int)

Specified by:

freePages in class PageManager

Parameters:

address - The memory address as returned from PageManager.allocatePages(int, int)

npages - The number of pages to free.

protectPages

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

Description copied from class: PageManager

Sets the protection mask on a memory region.

Specified by:

protectPages in class PageManager

Parameters:

address - The start of the memory region.

npages - The number of pages to protect.

protection - The protection mask.