Prefer pass-by-value over pass-by-reference, but only for private
functions.  Suppress the warning generally, because it's triggered by
public functions that can't be changed backwards-compatibly.

Signed-off-by: Toby Lawrence <toby@nuclearfurnace.com>

In real world we will register TcpListener for readable events. Let's make example
reflect that as well.

* Integrate lazycell 1.2.0 into the project

...rather than getting it from the crates.io. The problem is that latest
lazycell doesn't work with rust 1.18.0 anymore that mio supports.  This
commit only adds the origincal lazycell.rs without any modifications.
I want commits to show the changes I made to the lazycell.rs 1.2.0.

* Fix lazycell to work with rust 1.18.0

* Removed example, which wouldn't compile, because lazycell wasn't detected.
* Simply use std instead of libcore.
* Removed associated constant, which is still an experimental feature in
  rust 1.18.0.

* Fix android builds

* Delete doc examples for deprecated code

When a registration is signalled from a side thread and the main thread
is blocke in `poll`, a pipe is used to interrupt the blocked `poll`
call. However, this pipe write is expensive and should only be made when
`poll` is blocked.

To avoid spurrious calls, the readiness queue tracks a `sleep_token`.
When a node is scheduled, it checks if the `sleep_token` is present. If
it is, it writes to the pipe to wake up the main thread.

Currently, the `sleep_token` isn't cleared when the blocking call to
`poll` wakes up naturally. This results in the next registration signal
to write to the pipe even though the main thread is not blocked.

This patch clears the `sleep_token` when the blocking call returns.

Fixes #785

The timer module has been deprecated since 0.6.5, and its tests sometimes fail
spuriously. This branch removes them.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

This also disables error on warning unless testing.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

The iOS simulator has stopped running on Travis.

Closes #863, #864.

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

socketlen_t is defined as an u32 in libc 0.2.42, this conditionnal
compilation is not needed anymore and creates a compilation error.

Closes #851, #852

* Fix unused clone lint warning
* Disable aarch64-linux-android until net2 is fixed.

It uses BuildBot now.

Fixes #738 

winapi versions earlier than 0.2.6 don't successfully compile

Discovered via `cargo update -Z minimal-versions`

This adds the travis build support as requested in #807.