Revert "Remove dead code: legacy read/write ops"

This is causing a segfault for unknown reasons - see #2787.

This reverts commit 498f6ad431478f655b136782093e19e29248b24d.

1 files changed, 0 insertions, 110 deletions

diff --git a/cli/ops/dispatch_minimal.rs b/cli/ops/dispatch_minimal.rs
deleted file mode 100644
index be2cafea4..000000000
--- a/cli/ops/dispatch_minimal.rs
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-// Do not add flatbuffer dependencies to this module.
-//! Connects to js/dispatch_minimal.ts sendAsyncMinimal This acts as a faster
-//! alternative to flatbuffers using a very simple list of int32s to lay out
-//! messages. The first i32 is used to determine if a message a flatbuffer
-//! message or a "minimal" message.
-use crate::state::ThreadSafeState;
-use deno::Buf;
-use deno::CoreOp;
-use deno::ErrBox;
-use deno::Op;
-use deno::PinnedBuf;
-use futures::Future;
-
-#[derive(Copy, Clone, Debug, PartialEq)]
-// This corresponds to RecordMinimal on the TS side.
-pub struct Record {
-  pub promise_id: i32,
-  pub arg: i32,
-  pub result: i32,
-}
-
-impl Into<Buf> for Record {
-  fn into(self) -> Buf {
-    let vec = vec![self.promise_id, self.arg, self.result];
-    let buf32 = vec.into_boxed_slice();
-    let ptr = Box::into_raw(buf32) as *mut [u8; 3 * 4];
-    unsafe { Box::from_raw(ptr) }
-  }
-}
-
-pub fn parse_min_record(bytes: &[u8]) -> Option<Record> {
-  if bytes.len() % std::mem::size_of::<i32>() != 0 {
-    return None;
-  }
-  let p = bytes.as_ptr();
-  #[allow(clippy::cast_ptr_alignment)]
-  let p32 = p as *const i32;
-  let s = unsafe { std::slice::from_raw_parts(p32, bytes.len() / 4) };
-
-  if s.len() != 3 {
-    return None;
-  }
-  let ptr = s.as_ptr();
-  let ints = unsafe { std::slice::from_raw_parts(ptr, 3) };
-  Some(Record {
-    promise_id: ints[0],
-    arg: ints[1],
-    result: ints[2],
-  })
-}
-
-#[test]
-fn test_parse_min_record() {
-  let buf = vec![1, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0];
-  assert_eq!(
-    parse_min_record(&buf),
-    Some(Record {
-      promise_id: 1,
-      arg: 3,
-      result: 4,
-    })
-  );
-
-  let buf = vec![];
-  assert_eq!(parse_min_record(&buf), None);
-
-  let buf = vec![5];
-  assert_eq!(parse_min_record(&buf), None);
-}
-
-pub type MinimalOp = dyn Future<Item = i32, Error = ErrBox> + Send;
-pub type Dispatcher = fn(i32, Option<PinnedBuf>) -> Box<MinimalOp>;
-
-pub fn dispatch(
-  d: Dispatcher,
-  state: &ThreadSafeState,
-  control: &[u8],
-  zero_copy: Option<PinnedBuf>,
-) -> CoreOp {
-  let mut record = parse_min_record(control).unwrap();
-  let is_sync = record.promise_id == 0;
-
-  let state = state.clone();
-
-  let rid = record.arg;
-  let min_op = d(rid, zero_copy);
-
-  let fut = Box::new(min_op.then(move |result| -> Result<Buf, ()> {
-    match result {
-      Ok(r) => {
-        record.result = r;
-      }
-      Err(err) => {
-        // TODO(ry) The dispatch_minimal doesn't properly pipe errors back to
-        // the caller.
-        debug!("swallowed err {}", err);
-        record.result = -1;
-      }
-    }
-    let buf: Buf = record.into();
-    state.metrics_op_completed(buf.len());
-    Ok(buf)
-  }));
-  if is_sync {
-    Op::Sync(fut.wait().unwrap())
-  } else {
-    Op::Async(fut)
-  }
-}