Merge #820

820: Change AioCb to primarily use Bytes instead of Rc<[u8]> r=Susurrus a=asomers

`Rc<[u8]>` isn't a very good buffer type to use for aio.  For one thing, it lacks interior mutability.  For another, a single `Rc<[u8]>` can't be carved up into smaller buffers of the same type.  `Bytes` and `BytesMut` fix both problems.  This PR removes the ability to construct an `AioCb` from `Rc<[u8]>` and adds the ability to construct one from `Bytes`, `BytesMut`, or raw pointers (for consumers who need even more flexibility).  At this stage, the PR has the following warts:

1. A hack is necessary to force small `Bytes` buffers to allocate on the heap.  I plan to fix this with an enhancement to the bytes crate.
2. The `AioCb::buffer` method is necessary due to a deficiency in the tokio-core crate.  Once I fix that, then only `AioCb::into_buffer`will need to be public.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 08e98580..5aaebc40 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -11,6 +11,7 @@
 #![cfg_attr(test, deny(warnings))]
 #![recursion_limit = "500"]
 
+extern crate bytes;
 #[macro_use]
 extern crate bitflags;