ham_file_filter_t Struct Reference

#include <hamsterdb_int.h>

Data Fields
void *	userdata
ham_file_filter_before_write_cb_t	before_write_cb
ham_file_filter_after_read_cb_t	after_read_cb
ham_file_filter_close_cb_t	close_cb
ham_u32_t	_flags
ham_file_filter_t *	_next
ham_file_filter_t *	_prev

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Detailed Description

A handle for file-level filtering

File-level filters can modify the page data before some data is written to disk, and immediately after it's read from disk.

File-level filters can be used for example for writing encryption filters. See ham_env_enable_encryption() to create a filter for AES-based encryption.

Each of the three callback functions can be NULL.

Before this structure is used, it has to be initialized with zeroes.

Definition at line 109 of file hamsterdb_int.h.

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Field Documentation

void* ham_file_filter_t::userdata

The user data

Definition at line 112 of file hamsterdb_int.h.

ham_file_filter_before_write_cb_t ham_file_filter_t::before_write_cb

The function which is called before the page is written

Definition at line 115 of file hamsterdb_int.h.

ham_file_filter_after_read_cb_t ham_file_filter_t::after_read_cb

The function which is called after the page is read

Definition at line 118 of file hamsterdb_int.h.

ham_file_filter_close_cb_t ham_file_filter_t::close_cb

The function which is when the Database is closed

Definition at line 121 of file hamsterdb_int.h.

ham_u32_t ham_file_filter_t::_flags

For internal use

Definition at line 124 of file hamsterdb_int.h.

ham_file_filter_t* ham_file_filter_t::_next

For internal use

Definition at line 127 of file hamsterdb_int.h.

ham_file_filter_t * ham_file_filter_t::_prev

Definition at line 127 of file hamsterdb_int.h.

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The documentation for this struct was generated from the following file:

• include/ham/hamsterdb_int.h