sqlite3_api_routines

sqlite3_api_routines.rs

#![feature(c_variadic)]
use atomic::{Atomic, Ordering};

#[allow(non_camel_case_types)]
pub struct sqlite3_api_routines {
    pub db_config: ::std::option::Option<
        unsafe extern "C" fn(
            //arg1: *mut sqlite3,
            arg2: ::std::os::raw::c_int,
            ...
        ) -> ::std::os::raw::c_int,
    >,
}

unsafe extern "C" fn db_config(arg2: ::std::os::raw::c_int, ...) -> ::std::os::raw::c_int {
    123
}

#[allow(non_upper_case_globals)]
static _sqlite3_db_config: Atomic<
    Option<unsafe extern "C" fn(arg2: ::std::os::raw::c_int, ...) -> ::std::os::raw::c_int>,
> = Atomic::new(None);

pub unsafe fn sqlite3_db_config(arg2: ::std::os::raw::c_int) -> ::std::os::raw::c_int {
    if let Some(fun) = _sqlite3_db_config.load(Ordering::Acquire) {
        fun(arg2)
    } else {
        panic!("SQLite API not initialized")
    }
}

fn main() {
    let sqlite3_api = sqlite3_api_routines {
        db_config: Some(db_config),
    };
    _sqlite3_db_config.store(sqlite3_api.db_config, Ordering::Release);
    println!("sqlite3_db_config: {}", unsafe { sqlite3_db_config(0) });
    println!(
        "is_lock_free: {}",
        Atomic::<
            Option<unsafe extern "C" fn(arg2: ::std::os::raw::c_int, ...) -> ::std::os::raw::c_int>,
        >::is_lock_free()
    );
}