Croissant Runtime
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crsn/crsn_buf/src/lib.rs

71 lines
2.3 KiB

use crsn::asm::data::literal::Value;
use crsn::asm::error::CrsnError;
use crsn::asm::instr::op::OpKind;
use crsn::asm::parse::arg_parser::TokenParser;
use crsn::module::{CrsnExtension, ParseRes};
use crsn::runtime::fault::Fault;
use crsn::runtime::run_thread::{RunState, ThreadInfo};
use crsn::sexp::SourcePosition;
use crate::parse::{BUF_IOMODE_STACK, BUF_IOMODE_REVERSE_STACK, BUF_IOMODE_QUEUE, BUF_IOMODE_REVERSE_QUEUE};
use crsn::asm::data::Wr;
mod defs;
mod parse;
mod exec;
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#[derive(Debug, Clone)]
pub struct BufOps;
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impl BufOps {
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pub fn new() -> Box<dyn CrsnExtension> {
Box::new(Self)
}
}
impl CrsnExtension for BufOps {
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fn name(&self) -> &'static str {
"bufs"
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}
fn parse_op<'a>(&self, pos: &SourcePosition, keyword: &str, args: TokenParser<'a>) -> Result<ParseRes<'a, OpKind>, CrsnError> {
parse::parse(pos, keyword, args)
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}
fn drop_obj(&self, _ti: &ThreadInfo, state: &mut RunState, handle: Value) -> Result<Option<()>, Fault> {
exec::drop_obj(state, handle)
}
/// Run-time method called to read an object (using the object handle syntax)
fn read_obj(&self, state: &mut RunState, handle: Value)
-> Result<Option<Value>, Fault>
{
exec::read_obj(state, handle)
}
/// Run-time method called to write an object (using the object handle syntax)
fn write_obj(&self, state: &mut RunState, handle: Value, value: Value) -> Result<Option<()>, Fault>
{
exec::write_obj(state, handle, value)
}
/// Get value of an extension-provided constant.
/// This constant may be an object handle, or a constant value used as argument in some other instruction.
fn get_constant_value<'a>(&self, name: &str) -> Option<Value>
{
match name {
"BFIO_STACK" => Some(BUF_IOMODE_STACK),
"BFIO_RSTACK" => Some(BUF_IOMODE_REVERSE_STACK),
"BFIO_QUEUE" => Some(BUF_IOMODE_QUEUE),
"BFIO_RQUEUE" => Some(BUF_IOMODE_REVERSE_QUEUE),
_ => None
}
}
/// Run-time method called to read all values from an object ("lds" using the object handle syntax)
fn read_obj_all(&self, state: &mut RunState, whandle: Wr, rhandle: Value)
-> Result<Option<()>, Fault>
{
exec::read_obj_all(state, whandle, rhandle)
}
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}