os: implement memory bindings

* us_get_free_memory
* us_get_total_memory

add uv_tty_reset_mode()

Merge remote-tracking branch 'origin/v0.6'

Merge remote-tracking branch 'origin/v0.6'

Conflicts:
src/win/util.c

remove uv_thread_self

Merge remote branch 'origin/v0.6'

Revert "Add uv_pipe_pair for communication between threads"

Not needed. We took a different approach for isolates.

This reverts commit 5cc6090fdf738c7ae6677627f9f151c9bc16b43f.

Add uv_pipe_pair for communication between threads

This is only the Unix implementation and test.

Fix Windows build, uv_eio_channel is Unix only.

unix: create separate eio result queue per loop

Makes the eio "done" callback run in the thread that submitted it. Makes it safe
to use libeio from multiple event loops.

Wrap platform "thread-safe run once" APIs.

add uv_thread_self

platform api

add uv_run_once()

Merge branch 'v0.6'

Conflicts:
src/unix/core.c
src/win/winapi.h

Merge branch 'v0.6'

util: add uv_strlcpy() and uv_strlcat() functions

Wrap platform thread APIs.

Wrap platform mutex and rwlock APIs.

Read/write locks are emulated with critical sections on Windows XP and Vista
because those platforms don't have a (complete) native read/write lock A

Wrap platform mutex and rwlock APIs.

Read/write locks are emulated with critical sections on Windows XP and Vista
because those platforms don't have a (complete) native read/write lock API.

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Remove uv_is_tty. Use uv_guess_handle instead.

unix,win: Make uv_freeaddrinfo to clean up addrinfo

Fixes #196

unix: add uv_guess_handle and uv_tty_get_winsize

windows: file watcher

Add uv_is_tty()

Add EEXIST handling

Additionally, map ERROR_ALREADY_EXISTS to EEXIST on Windows. I'm a bit
unsure about this mapping. Could a windows person confirm?