unix: fix uv_async_send not working with Sun Studio

uv_async_send would always return 1 when non-gcc compilers were used.
When uv_async_send returns 1 no attempt is made to make port_get

unix: fix uv_async_send not working with Sun Studio

uv_async_send would always return 1 when non-gcc compilers were used.
When uv_async_send returns 1 no attempt is made to make port_getn
return, so in this situation uv_async_send didn't wake up the event
loop.

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darwin: fix return value of uv_sem_init()

It should return 0 or -1, not the kernel status code.

darwin: handle KERN_ABORTED in uv_sem_wait()

linux: fix fscanf() -Wunused-result warning

windows: lock tty output before updating the virtual window size

windows: emit SIGWINCH when the console size changes

darwin, freebsd: use ioctl(FIOCLEX) and ioctl(FIONBIO)

Set the non-blocking and close-on-exec flags with ioctl() instead of fcntl(),
it's about 10-25% faster.

Stick with fcntl()

darwin, freebsd: use ioctl(FIOCLEX) and ioctl(FIONBIO)

Set the non-blocking and close-on-exec flags with ioctl() instead of fcntl(),
it's about 10-25% faster.

Stick with fcntl() on Solaris. ioctl(FIONBIO) works but is twice as slow as
fcntl(O_NONBLOCK). ioctl(FIOCLEX) doesn't raise an error but doesn't actually
work either.

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Merge branch 'v0.8'

windows: fix uninitialized memory access in uv_update_time()

uv_update_time does not overwrite the high 32 bits of uv_loop_t.time.
It merely increments it by one when the low 32 bits hav

windows: fix uninitialized memory access in uv_update_time()

uv_update_time does not overwrite the high 32 bits of uv_loop_t.time.
It merely increments it by one when the low 32 bits have wrapped. That
means that `time` needs to be initialized to zero before
uv_update_time() is called for the first time.

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linux: don't retry syscall after ENOSYS

Don't try the pipe2() or socketpair(O_CLOEXEC) syscalls when a previous call to
uv__make_pipe() or uv__make_socketpair() call established that the

linux: don't retry syscall after ENOSYS

Don't try the pipe2() or socketpair(O_CLOEXEC) syscalls when a previous call to
uv__make_pipe() or uv__make_socketpair() call established that the kernel
doesn't support it. Speeds up pipe and socketpair creation on older kernels.

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linux: tag no_accept4 __read_mostly

unix: add __read_mostly macro

Variables tagged with __read_mostly are put into a separate ELF section to
improve the cache locality of data that is read often but seldom written to.

linux: fix uv__epoll_create() prototype

unix: use select() for specific fds on OS X

kqueue(2) on osx doesn't work (emits EINVAL error) with specific fds
(i.e. /dev/tty, /dev/null, etc). When given such descriptors - start

unix: use select() for specific fds on OS X

kqueue(2) on osx doesn't work (emits EINVAL error) with specific fds
(i.e. /dev/tty, /dev/null, etc). When given such descriptors - start
select(2) watcher thread that will emit io events.

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windows: uv_signal_stop should be infallible

windows: report UV_INVAL when an invalid signum is supplied

windows: fix stupid uv_signal bugs

Merge branch 'v0.8'

Conflicts:
src/fs-poll.c

unix, windows: fix memory corruption in fs-poll.c

uv_fs_poll_t has an embedded uv_timer_t handle that got closed at a time when
the memory of the encapsulating handle might already have

unix, windows: fix memory corruption in fs-poll.c

uv_fs_poll_t has an embedded uv_timer_t handle that got closed at a time when
the memory of the encapsulating handle might already have been deallocated.

Solve that by moving the poller's state into a structure that is allocated on
the heap and can be freed independently.

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test: add uv_fs_poll_t to benchmark-sizes.c

unix: fix const correctness compiler warning

This is a back-port of commit f97c80f from the master branch.

Merge branch 'v0.8'

unix: fix integer overflow in uv_hrtime

Conversion to nanoseconds was overflowing with 32-bit builds.

unix: fix the build

uv_signal_t.signum was moved to uv.h in an earlier commit.

windows: basic signal handling support with uv_signal_t

This still needs tests.