db_manage.c File Reference

#include <stdlib.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include "odb.h"
#include "op_string.h"
#include "op_libiberty.h"

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Defines
#define	_GNU_SOURCE
#define	DEFAULT_NODE_NR(offset_node) 128
#define	FILES_HASH_SIZE 512
Functions
static __inline odb_descr_t *	odb_to_descr (odb_data_t *data)
static __inline odb_node_t *	odb_to_node_base (odb_data_t *data)
static __inline odb_index_t *	odb_to_hash_base (odb_data_t *data)
static unsigned int	tables_size (odb_data_t const *data, odb_node_nr_t node_nr)
int	odb_grow_hashtable (odb_data_t *data)
void	odb_init (odb_t *odb)
static void	init_hash ()
static odb_data_t *	find_samples_data (size_t hash, char const *filename)
int	odb_open (odb_t odb, char const filename, enum odb_rw rw, size_t sizeof_header)
void	odb_close (odb_t *odb)
int	odb_open_count (odb_t const *odb)
void *	odb_get_data (odb_t *odb)
void	odb_sync (odb_t const *odb)
Variables
static struct list_head	files_hash [FILES_HASH_SIZE]

Detailed Description

Management of a DB file

Remarks:: Copyright 2002 OProfile authors; Read the file COPYING

Author:: Philippe Elie

Definition in file db_manage.c.

Define Documentation

#define _GNU_SOURCE

Definition at line 11 of file db_manage.c.

#define DEFAULT_NODE_NR ( offset_node ) 128

Definition at line 127 of file db_manage.c.

Referenced by odb_open().

#define FILES_HASH_SIZE 512

Definition at line 128 of file db_manage.c.

Referenced by init_hash(), and odb_open().

Function Documentation

static odb_data_t* find_samples_data	(	size_t	hash,
		char const *	filename
	)			`[static]`

Definition at line 142 of file db_manage.c.

References odb_data::filename, files_hash, init_hash(), list_entry, list_for_each, and list_head::next.

Referenced by odb_open().

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static void init_hash ( ) [static]

Definition at line 133 of file db_manage.c.

References files_hash, FILES_HASH_SIZE, and list_init().

Referenced by find_samples_data().

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void odb_close ( odb_t * odb )

Close the given ODB file

Definition at line 263 of file db_manage.c.

References odb_data::base_memory, odb_t::data, odb_data::descr, odb_data::fd, odb_data::filename, odb_data::list, list_del(), odb_data::ref_count, odb_descr_t::size, and tables_size().

Referenced by close_sfile(), ibs_sfile_close(), main(), opd_24_sfile_lru_clear(), opd_close_image_samples_files(), sanity_check(), speed_test(), and test().

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void* odb_get_data ( odb_t * odb )

return the start of the mapped data

Definition at line 291 of file db_manage.c.

References odb_data::base_memory, and odb_t::data.

Referenced by import_from_abi(), main(), opd_open_24_sample_file(), opd_open_sample_file(), and operf_open_sample_file().

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int odb_grow_hashtable ( odb_data_t * data )

grow the hashtable in such way current_size is the index of the first free node. Take care all node pointer can be invalidated by this call.

Node allocation is done in a two step way 1st) ensure a free node exist eventually, caller can setup it, 2nd) commit the node allocation with odb_commit_reservation(). This is done in this way to ensure node setup is visible from another process like pp tools in an atomic way.

returns 0 on success, non zero on failure in this case this function do nothing and errno is set by the first libc call failure allowing to retry after cleanup some program resource.

Definition at line 63 of file db_manage.c.

References odb_data::base_memory, BUCKET_FACTOR, odb_descr_t::current_size, odb_data::descr, odb_data::fd, odb_data::hash_base, odb_data::hash_mask, odb_node_t::key, odb_node_t::next, odb_data::node_base, odb_do_hash(), odb_to_descr(), odb_to_hash_base(), odb_to_node_base(), odb_descr_t::size, and tables_size().