backend/mmapings.h File Reference

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Detailed Description

Manage the mmap objects of a file.

Definition in file mmapings.h.

#include "lib/mutex.h"
#include "lib/llist.h"
#include "backend/filedescriptor.h"
#include "backend/mmap.h"
#include "backend/file.h"
#include <nobug.h>

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Classes
struct	lumiera_mmapings_struct
Typedefs
typedef struct lumiera_mmapings_struct	lumiera_mmapings
typedef lumiera_mmapings *	LumieraMMapings
Functions
void	lumiera_mmapings_delete (LumieraMMapings self)
	destroy and free mmapings container and all its resources
LumieraMMapings	lumiera_mmapings_destroy (LumieraMMapings self)
	destroy mmapings container and free all resources.
LumieraMMapings	lumiera_mmapings_init (LumieraMMapings self, LumieraFile file, size_t chunksize)
	initialize mmapings container
LumieraMMap	lumiera_mmapings_mmap_acquire (LumieraMMapings self, LumieraFile file, LList acquirer, off_t start, size_t size)
	acquire a mmap which covers the given range
LumieraMMapings	lumiera_mmapings_new (LumieraFile file, size_t chunksize)
	allocate and initialize new mmapings container
void	lumiera_mmapings_release_mmap (LumieraMMapings self, LList acquirer, LumieraMMap map)
	release a previously acquired MMap object
	NOBUG_DECLARE_FLAG (mmapings)

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Function Documentation

LumieraMMapings lumiera_mmapings_init	(	LumieraMMapings	self,
		LumieraFile	file,
		size_t	chunksize
	)

initialize mmapings container

Definition at line 37 of file mmapings.c.

References lumiera_mutex_init().

Referenced by lumiera_mmapings_new().

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LumieraMMapings lumiera_mmapings_destroy

(

LumieraMMapings

self

)

destroy mmapings container and free all resources.

Definition at line 53 of file mmapings.c.

References LLIST_TO_STRUCTP, LLIST_WHILE_TAIL, and lumiera_mutex_destroy().

Referenced by lumiera_mmapings_delete().

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LumieraMMapings lumiera_mmapings_new	(	LumieraFile	file,
		size_t	chunksize
	)

allocate and initialize new mmapings container

Definition at line 72 of file mmapings.c.

References lumiera_mmapings_init().

Referenced by lumiera_file_chunksize_set().

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void lumiera_mmapings_delete

(

LumieraMMapings

self

)

destroy and free mmapings container and all its resources

Definition at line 80 of file mmapings.c.

References lumiera_mmapings_destroy().

Referenced by lumiera_filedescriptor_delete().

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LumieraMMap lumiera_mmapings_mmap_acquire	(	LumieraMMapings	self,
		LumieraFile	file,
		LList	acquirer,
		off_t	start,
		size_t	size
	)

acquire a mmap which covers the given range

Parameters:

	self	mmapings where to search
	acquirer	list node of the new owner which will registered in the mmap
	start	begin of the required range
	size	requested size

Returns:

MMap object covering the requested range or NULL on error

Definition at line 88 of file mmapings.c.

References lumiera_mmap_struct::cachenode, LLIST_FOREACH, LLIST_TO_STRUCTP, lumiera_mmapcache_checkout(), LUMIERA_MUTEX_SECTION, lumiera_mmap_struct::refcnt, lumiera_mmap_struct::searchnode, lumiera_mmap_struct::size, and lumiera_mmap_struct::start.

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void lumiera_mmapings_release_mmap	(	LumieraMMapings	self,
		LList	acquirer,
		LumieraMMap	map
	)

release a previously acquired MMap object

Parameters:

	self	mmapings to which the map belongs
	acquirer	holding node
	map	object to be released

Definition at line 138 of file mmapings.c.

References lumiera_mmap_struct::cachenode, lumiera_mmapcache_checkin(), and LUMIERA_MUTEX_SECTION.

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