unix, windows: add MAC to uv_interface_addresses()

Make uv_interface_addresses() return the MAC address as a 48 bits
binary value in the phys_addr field of the uv_interface_address_t

unix, windows: add MAC to uv_interface_addresses()

Make uv_interface_addresses() return the MAC address as a 48 bits
binary value in the phys_addr field of the uv_interface_address_t
struct.

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unix, windows: return error codes directly

This commit changes the libuv API to return error codes directly rather
than storing them in a loop-global field.

A code snippet like

unix, windows: return error codes directly

This commit changes the libuv API to return error codes directly rather
than storing them in a loop-global field.

A code snippet like this one:

if (uv_foo(loop) < 0) {
uv_err_t err = uv_last_error(loop);
fprintf(stderr, "%s\n", uv_strerror(err));
}

Should be rewritten like this:

int err = uv_foo(loop);
if (err < 0)
fprintf(stderr, "%s\n", uv_strerror(err));

The rationale for this change is that it should make creating bindings
for other languages a lot easier: dealing with struct return values is
painful with most FFIs and often downright buggy.

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unix: style fixups

unix, win: add netmask to uv_interface_address

Include the netmask when returning information about the OS network
interfaces.

This commit provides implementations for windows a

unix, win: add netmask to uv_interface_address

Include the netmask when returning information about the OS network
interfaces.

This commit provides implementations for windows and those unix
platforms using getifaddrs().

AIX was not implemented because it requires the use of ioctls and I do
not have an AIX development/test environment. The windows code was
developed using mingw on winxp as I do not have access to visual studio.

Tested on darwin (ipv4/ipv6) and winxp (ipv4 only). Needs testing on
newer windows using ipv6 and other unix platforms.

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unix: use uv__hrtime() internally

This commit renames the various uv_hrtime() implementations to uv__hrtime().

Libuv uses the high-res timer internally in performance-critical code

unix: use uv__hrtime() internally

This commit renames the various uv_hrtime() implementations to uv__hrtime().

Libuv uses the high-res timer internally in performance-critical code paths.
Calling the non-public version avoids going through the PLT when libuv is
compiled as a shared object.

The exported uv_hrtime() now has a single definition in src/unix/core.c that
calls uv__hrtime().

A future optimization is to lift the uv__hrtime() declarations into header
files so they can be inlined at the call sites. Then again, linking with -flto
should accomplish the same thing.

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unix: remove dependency on libev

unix: support missing api on NetBSD

Merge branch 'v0.8'

unix: fix integer overflow in uv_hrtime

Conversion to nanoseconds was overflowing with 32-bit builds.

unix: move platform init out of loop.c

Move platform-specific initialization logic out of loop.c and into the
platform files (freebsd.c, sunos.c, etc).

unix, test: make NANOSEC a 64 bits unsigned int

Avoids accidental overflow / truncation when it's used in 32 bits arithmetic.

Remove unused variables on NetBSD.

Fix typo that broke libuv on NetBSD: psysconf() -> sysconf()

Change return type of uv_get_*_memory() functions

... from double to uint64_t. Limit use of floating point in public API as much
as possible.

unix: implement kqueue file watcher API

kqueue fds are not embeddable into other pollsets (select, poll, kqueue).
Hack the libev event loop to receive kqueue events with filter flags int

unix: implement kqueue file watcher API

kqueue fds are not embeddable into other pollsets (select, poll, kqueue).
Hack the libev event loop to receive kqueue events with filter flags intact.

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os: implement loadavg (not working on cygwin/win)

os: implement memory bindings

* us_get_free_memory
* us_get_total_memory

Fixes #76. Unify OS error reporting

As a nice fringe benefit, this also shaves a word
off of a windows TCP handle by replacing "uv_err_t
bind_error" with "int bind_error".

unix: stub file watcher implementation

The file watcher API has not been implemented on all Unices yet.
Provide stubs on those platforms so libuv at least compiles.

unix: netbsd support