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|
use std::{
sync::{mpsc::channel, Arc, RwLock, RwLockReadGuard},
thread::JoinHandle,
};
use mlua::prelude::*;
use super::{cell::Cell, Sheet};
pub trait EvalFunction {
fn eval_function(
&self,
func: String,
range: Vec<(usize, usize)>,
) -> JoinHandle<Result<Sheet, String>>;
}
impl EvalFunction for Arc<RwLock<Sheet>> {
fn eval_function(
&self,
func_text: String,
range: Vec<(usize, usize)>,
) -> JoinHandle<Result<Sheet, String>> {
*self.read().unwrap().progress.lock().unwrap() = 0;
let this = Arc::clone(self);
std::thread::spawn(move || {
let chunks = range.chunks(
(range.len() / std::thread::available_parallelism().unwrap())
.min(range.len())
.max(1000),
);
if chunks.len() > 4 {
let (tx, rx) = channel();
std::thread::scope(|s| {
for chunk in chunks {
let tx = tx.clone();
let this = Arc::clone(&this);
let func_text = func_text.clone();
s.spawn(move || {
let tx = tx.clone();
let read_sheet = this.read().unwrap();
let result = EvalRange::new(chunk.iter(), func_text, read_sheet);
match result {
Ok(evaluator) => {
for result in evaluator {
if result.is_err() {
tx.send(result).unwrap();
break;
}
tx.send(result).unwrap();
}
}
Err(error) => tx.send(Err(error)).unwrap(),
}
});
}
drop(tx);
let read_sheet = this.read().unwrap();
let mut sheet = read_sheet.clone();
let mut count = 0;
for result in rx {
count += 1;
*read_sheet.progress.lock().unwrap() = (count * 100 / range.len()) as u8;
match result {
Ok((row, column, cell)) => sheet.set_cell(row, column, cell),
Err(error) => return Err(error.to_string()),
}
}
crate::lua::new_instance().unwrap().expire_registry_values();
Ok(sheet)
})
} else {
let read_sheet = this.read().unwrap();
let mut sheet = read_sheet.clone();
let result = EvalRange::new((&range).iter(), func_text, read_sheet);
match result {
Ok(evaluator) => {
for result in evaluator {
match result {
Ok((row, column, cell)) => sheet.set_cell(row, column, cell),
Err(error) => return Err(error.to_string()),
}
}
}
Err(error) => return Err(error),
}
crate::lua::new_instance().unwrap().expire_registry_values();
Ok(sheet)
}
})
}
}
struct EvalRange<'a, I>
where
I: Iterator<Item = &'a (usize, usize)>,
{
lua: Lua,
reg_func_key: LuaRegistryKey,
range: I,
read_sheet: RwLockReadGuard<'a, Sheet>,
}
impl<'a, I> EvalRange<'a, I>
where
I: Iterator<Item = &'a (usize, usize)>,
{
fn new(
range: I,
script: String,
read_sheet: RwLockReadGuard<'a, Sheet>,
) -> Result<Self, String> {
let lua = crate::lua::new_instance().unwrap();
let result = lua
.load(script.clone())
.set_name("Temp Script")
.eval::<LuaFunction>();
if result.is_err() {
return Err(result.err().unwrap().to_string());
}
let lua = crate::lua::new_instance().unwrap();
let func = lua
.load(script)
.set_name("Temp Script")
.eval::<LuaFunction>()
.unwrap();
Ok(Self {
reg_func_key: lua.create_registry_value(func).unwrap(),
lua,
range,
read_sheet,
})
}
}
impl<'a, I> Iterator for EvalRange<'a, I>
where
I: Iterator<Item = &'a (usize, usize)>,
{
type Item = Result<(usize, usize, Cell), String>;
fn next(&mut self) -> Option<Self::Item> {
let func: LuaFunction = self.lua.registry_value(&self.reg_func_key).unwrap();
if let Some((row, column)) = self.range.next() {
let cellref = self.read_sheet.get_ref(*row, *column);
match func.call::<_, Cell>(cellref) {
Ok(cell) => Some(Ok((*row, *column, cell))),
Err(error) => Some(Err(error.to_string())),
}
} else {
None
}
}
}
|
