auto merge of #6577 : brson/rust/io-upstream, r=pcwalton

r?

This is all of my scheduler work on #4419 from the last 3 weeks or so. I've had a few failed pull requests so far but I think the problems are ironed out.

* TCP
* The beginnings of runtime embedding APIs
* Porting various corners of core to be compatible with both schedulers
* libuv timer bindings
* Further refinement of I/O error handling, including a new, incomplete, `read_error` condition
* Incomplete refactoring to make tasks work without coroutines and user-space scheduling
* Implementations of Reader/Writer extension methods
* Implementations of the most important part of core::comm

I'm particularly happy with how easy the [comm types on top of the scheduler](https://github.com/brson/rust/blob/io-upstream/src/libcore/rt/comm.rs). Note that these implementations do not use pipes. If anything here needs careful review though it's this code.

This branch passes 95% of the run-pass tests (with `TESTARGS=--newrt`)

In the next week I'll probably spend some time adding preliminary multithreading and seeing how close we are to removing the old runtime.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/rt/rust_log.cpp b/src/rt/rust_log.cpp
index c2b58c9fda7..df24f569495 100644
--- a/src/rt/rust_log.cpp
+++ b/src/rt/rust_log.cpp
@@ -324,6 +324,10 @@ void update_log_settings(void* crate_map, char* settings) {
     free(buffer);
 }
 
+extern "C" CDECL void
+rust_update_log_settings(void* crate_map, char* settings) {
+    update_log_settings(crate_map, settings);
+}
 
 //
 // Local Variables: