class Mmap

ColdStore Mmap manager More...

List of all Methods
Definition	`#include <qvmm.h>`

Public Members

const size_t max
const size_t page_size
bool initialized
static size_t open ( int fd)
static int open (char *file)
static void close ( int fd)
static void* alloc ( size_t size)
static int check ( void* ptr)
static size_t align ( size_t size)
static void* pageof ( void* ptr)
static void* locked ( void)
static void lock ( void* l)
static void unlock ( void)

Detailed Description

ColdStore Mmap manager

Mmap maintains the store, providing

store information,

new page allocation, and

Latch services</ul> to the application.

const size_t max

maximum size of store (page aligned)

const size_t page_size

underlying page size of store (power of 2)

bool initialized

flag: is Mmap initialized?

size_t open ( int fd)

[static]

Mmap the file as a store.

Parameters:

fd file descriptor of open store

Returns: current size of store

int open (char *file)

[static]

Open and Mmap the named file as a store.

Parameters:

file file name

Returns: file descriptor of open store

void close ( int fd)

[static]

close the Mmap

Parameters:

fd file descriptor of open store

void* alloc ( size_t size)

[static]

Allocate a range of pages in the store

Parameters:

size size of allocation

Returns: allocated region

int check ( void* ptr)

[static]

check the validity of a pointer

Parameters:

ptr pointer to be checked

Returns: true if the pointer is in the Mmap

size_t align ( size_t size)

[static]

align a value to a page boundary

Parameters:

size value to align

Returns: page-aligned value

void* pageof ( void* ptr)

[static]

return the page which contains a pointer

Parameters:

ptr pointer to align

Returns: page-aligned pointer

Author: Phillipe Hebrais
Generated: colin@sharedtech.dhis.org on Sat Nov 6 11:59:21 199.