Remove dead code: legacy read/write ops (#2776)

readSync and writeSync use dispatch_minimal now.

1 files changed, 0 insertions, 162 deletions

diff --git a/cli/dispatch_minimal.rs b/cli/dispatch_minimal.rs
deleted file mode 100644
index 322094be2..000000000
--- a/cli/dispatch_minimal.rs
+++ /dev/null
@@ -1,162 +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::Op;
-use deno::OpId;
-use deno::PinnedBuf;
-use futures::Future;
-
-const OP_READ: OpId = 1;
-const OP_WRITE: OpId = 2;
-
-#[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 fn dispatch_minimal(
-  state: &ThreadSafeState,
-  op_id: OpId,
-  mut record: Record,
-  zero_copy: Option<PinnedBuf>,
-) -> CoreOp {
-  let is_sync = record.promise_id == 0;
-  let min_op = match op_id {
-    OP_READ => ops::read(record.arg, zero_copy),
-    OP_WRITE => ops::write(record.arg, zero_copy),
-    _ => unimplemented!(),
-  };
-
-  let state = state.clone();
-
-  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)
-  }
-}
-
-mod ops {
-  use crate::deno_error;
-  use crate::resources;
-  use crate::tokio_write;
-  use deno::ErrBox;
-  use deno::PinnedBuf;
-  use futures::Future;
-
-  type MinimalOp = dyn Future<Item = i32, Error = ErrBox> + Send;
-
-  pub fn read(rid: i32, zero_copy: Option<PinnedBuf>) -> Box<MinimalOp> {
-    debug!("read rid={}", rid);
-    let zero_copy = match zero_copy {
-      None => {
-        return Box::new(
-          futures::future::err(deno_error::no_buffer_specified()),
-        )
-      }
-      Some(buf) => buf,
-    };
-    match resources::lookup(rid as u32) {
-      None => Box::new(futures::future::err(deno_error::bad_resource())),
-      Some(resource) => Box::new(
-        tokio::io::read(resource, zero_copy)
-          .map_err(ErrBox::from)
-          .and_then(move |(_resource, _buf, nread)| Ok(nread as i32)),
-      ),
-    }
-  }
-
-  pub fn write(rid: i32, zero_copy: Option<PinnedBuf>) -> Box<MinimalOp> {
-    debug!("write rid={}", rid);
-    let zero_copy = match zero_copy {
-      None => {
-        return Box::new(
-          futures::future::err(deno_error::no_buffer_specified()),
-        )
-      }
-      Some(buf) => buf,
-    };
-    match resources::lookup(rid as u32) {
-      None => Box::new(futures::future::err(deno_error::bad_resource())),
-      Some(resource) => Box::new(
-        tokio_write::write(resource, zero_copy)
-          .map_err(ErrBox::from)
-          .and_then(move |(_resource, _buf, nwritten)| Ok(nwritten as i32)),
-      ),
-    }
-  }
-}