rusqlite/src/load_extension_guard.rs
2020-11-04 07:59:23 -08:00

39 lines
1.0 KiB
Rust

use crate::{Connection, Result};
/// `feature = "load_extension"` RAII guard temporarily enabling SQLite
/// extensions to be loaded.
///
/// ## Example
///
/// ```rust,no_run
/// # use rusqlite::{Connection, Result, LoadExtensionGuard};
/// # use std::path::{Path};
/// fn load_my_extension(conn: &Connection) -> Result<()> {
/// let _guard = LoadExtensionGuard::new(conn)?;
///
/// conn.load_extension(Path::new("my_sqlite_extension"), None)
/// }
/// ```
pub struct LoadExtensionGuard<'conn> {
conn: &'conn Connection,
}
impl LoadExtensionGuard<'_> {
/// Attempt to enable loading extensions. Loading extensions will be
/// disabled when this guard goes out of scope. Cannot be meaningfully
/// nested.
#[inline]
pub fn new(conn: &Connection) -> Result<LoadExtensionGuard<'_>> {
conn.load_extension_enable()
.map(|_| LoadExtensionGuard { conn })
}
}
#[allow(unused_must_use)]
impl Drop for LoadExtensionGuard<'_> {
#[inline]
fn drop(&mut self) {
self.conn.load_extension_disable();
}
}