Struct __wt_data_source 

#[repr(C)]
pub struct __wt_data_source {

    pub alter: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub create: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub compact: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub drop: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub open_cursor: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG, new_cursor: *mut *mut WT_CURSOR) -> c_int>,
    pub rename: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, newuri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub salvage: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub size: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, size: *mut wt_off_t) -> c_int>,
    pub truncate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub range_truncate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, start: *mut WT_CURSOR, stop: *mut WT_CURSOR) -> c_int>,
    pub verify: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub checkpoint: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, config: *mut WT_CONFIG_ARG) -> c_int>,
    pub terminate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION) -> c_int>,
    pub lsm_pre_merge: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, source: *mut WT_CURSOR, dest: *mut WT_CURSOR) -> c_int>,
}

Applications can extend WiredTiger by providing new implementations of the WT_DATA_SOURCE class. Each data source supports a different URI scheme for data sources to WT_SESSION::create, WT_SESSION::open_cursor and related methods. See @ref custom_data_sources for more information.

Thread safety: WiredTiger may invoke methods on the WT_DATA_SOURCE interface from multiple threads concurrently. It is the responsibility of the implementation to protect any shared data.

Applications register their implementation with WiredTiger by calling WT_CONNECTION::add_data_source.

@snippet ex_data_source.c WT_DATA_SOURCE register

Fields

alter: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to alter an object.

@snippet ex_data_source.c WT_DATA_SOURCE alter

create: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to create a new object.

@snippet ex_data_source.c WT_DATA_SOURCE create

compact: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to compact an object.

@snippet ex_data_source.c WT_DATA_SOURCE compact

drop: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to drop an object.

@snippet ex_data_source.c WT_DATA_SOURCE drop

open_cursor: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG, new_cursor: *mut *mut WT_CURSOR) -> c_int>

Callback to initialize a cursor.

@snippet ex_data_source.c WT_DATA_SOURCE open_cursor

rename: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, newuri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to rename an object.

@snippet ex_data_source.c WT_DATA_SOURCE rename

salvage: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to salvage an object.

@snippet ex_data_source.c WT_DATA_SOURCE salvage

size: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, size: *mut wt_off_t) -> c_int>

Callback to get the size of an object.

@snippet ex_data_source.c WT_DATA_SOURCE size

truncate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to truncate an object.

@snippet ex_data_source.c WT_DATA_SOURCE truncate

range_truncate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, start: *mut WT_CURSOR, stop: *mut WT_CURSOR) -> c_int>

Callback to truncate a range of an object.

@snippet ex_data_source.c WT_DATA_SOURCE range truncate

verify: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, uri: *const c_char, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to verify an object.

@snippet ex_data_source.c WT_DATA_SOURCE verify

checkpoint: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION, config: *mut WT_CONFIG_ARG) -> c_int>

Callback to checkpoint the database.

@snippet ex_data_source.c WT_DATA_SOURCE checkpoint

terminate: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, session: *mut WT_SESSION) -> c_int>

If non-NULL, a callback performed when the database is closed.

The WT_DATA_SOURCE::terminate callback is intended to allow cleanup, the handle will not be subsequently accessed by WiredTiger.

@snippet ex_data_source.c WT_DATA_SOURCE terminate

lsm_pre_merge: Option<unsafe extern "C" fn(dsrc: *mut WT_DATA_SOURCE, source: *mut WT_CURSOR, dest: *mut WT_CURSOR) -> c_int>

If non-NULL, a callback performed before an LSM merge.

@param[in] source a cursor configured with the data being merged @param[in] dest a cursor on the new object being filled by the merge

@snippet ex_data_source.c WT_DATA_SOURCE lsm_pre_merge

Trait Implementations

impl Clone for __wt_data_source

fn clone(&self) -> __wt_data_source

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for __wt_data_source

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for __wt_data_source