test: switch to new-style ASSERT_EQ macros (#4159)

Switch from old-style ASSERT macro to new-style ASSERT_EQ,... macros.

Using new-style macros makes it easier to debug test failure

test: switch to new-style ASSERT_EQ macros (#4159)

Switch from old-style ASSERT macro to new-style ASSERT_EQ,... macros.

Using new-style macros makes it easier to debug test failures

Fixes: https://github.com/libuv/libuv/issues/2974

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test: silence more valgrind warnings (#3917)

Pass the loop to MAKE_VALGRIND_HAPPY() so it's explicit on which loop
needs to be cleaned up. Since it asserts on uv_loop_close(), need to

test: silence more valgrind warnings (#3917)

Pass the loop to MAKE_VALGRIND_HAPPY() so it's explicit on which loop
needs to be cleaned up. Since it asserts on uv_loop_close(), need to
remove a couple of those that were being done before the call.

Cleanup where loop was assigned, so the entire test either uses loop or
uv_default_loop(). Not both.

Also take care of any reqs that may have been left uncleaned.

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win,pipe: ensure `req->event_handle` is defined

Previously, this field was being used uninitialized, leading to the
uv_write call returning failure. This only happens in the rare fallbac

win,pipe: ensure `req->event_handle` is defined

Previously, this field was being used uninitialized, leading to the
uv_write call returning failure. This only happens in the rare fallback
path where UV_HANDLE_EMULATE_IOCP is set, meaning that the OVERLAPPED
opened pipe already was associated with an IOCP.

Fixes: https://github.com/libuv/libuv/issues/629
PR-URL: https://github.com/libuv/libuv/pull/2620
Reviewed-By: Saúl Ibarra Corretgé <s@saghul.net>

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test,unix: fix race in test runner

The test runner inserted a 250 ms delay to give helper processes time to
settle. That's intrinsically race-y and caused tests to intermittently
fai

test,unix: fix race in test runner

The test runner inserted a 250 ms delay to give helper processes time to
settle. That's intrinsically race-y and caused tests to intermittently
fail on platforms like AIX.

Instead of a fixed delay, pass a file descriptor to the helper process
and wait until it closes the descriptor. That way we know for sure the
process has started.

Incidentally, this change reduces the running time of the test suite
from 112 to 26 seconds on my machine.

Fixes: https://github.com/libuv/libuv/issues/2041
PR-URL: https://github.com/libuv/libuv/pull/2056
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

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unix: sanity-check fds before closing

Ensure that close() system calls don't close stdio file descriptors
because that is almost never the intention.

This is also a partial work

unix: sanity-check fds before closing

Ensure that close() system calls don't close stdio file descriptors
because that is almost never the intention.

This is also a partial workaround for a kernel bug that seems to affect
all Linux kernels when stdin is a pipe that gets closed: fd 0 keeps
signalling EPOLLHUP but a subsequent call to epoll_ctl(EPOLL_CTL_DEL)
fails with EBADF. See joyent/node#6271 for details and a test case.

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include: uv_spawn takes const uv_process_options_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to

include: uv_spawn takes const uv_process_options_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to a
pointer-based approach.

Fixes #684.

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include: uv_read{2}_cb now takes const uv_buf_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to a

include: uv_read{2}_cb now takes const uv_buf_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to a
pointer-based approach.

Fixes #684.

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include: uv_alloc_cb now takes uv_buf_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to a
poin

include: uv_alloc_cb now takes uv_buf_t*

Passing or returning structs as values makes life hard for people that
work with libuv through a foreign function interface. Switch to a
pointer-based approach.

Fixes #684.

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process: make the 'status' parameter for exit_cb an int64_t

This means we no longer have to strip the high bit from the process exit
code on Windows, which is problematic because an unha

process: make the 'status' parameter for exit_cb an int64_t

This means we no longer have to strip the high bit from the process exit
code on Windows, which is problematic because an unhandled SEH exception
can make a process exit with a status code that has the high bit set.

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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, windows: rename uv_run2 to uv_run

This changes the prototype of uv_run() from:

int uv_run(uv_loop_t* loop);

To:

int uv_run(uv_loop_t* loop, uv_run_mode m

unix, windows: rename uv_run2 to uv_run

This changes the prototype of uv_run() from:

int uv_run(uv_loop_t* loop);

To:

int uv_run(uv_loop_t* loop, uv_run_mode mode);

Where `mode` is UV_RUN_DEFAULT, UV_RUN_ONCE or UV_RUN_NOWAIT.

Fixes #683.

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test, bench: make functions/variables static

Make functions and variables that are local to the compilation unit
static. Remove what turns out to be unused.

test, bench: ANSI-fy function prototypes

Replace `void f()` with `void f(void)`; the former means "a function
that takes any number of arguments, including none" while the latter
is

test, bench: ANSI-fy function prototypes

Replace `void f()` with `void f(void)`; the former means "a function
that takes any number of arguments, including none" while the latter
is what is actually intended: a function taking no arguments.

The first form also isn't strictly conforming ANSI/ISO C.

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test: fix signed/unsigned comparison warnings

test: move loop cleanup code to the individual tests

windows: allow specifying FDs to be inherited by a child process

Previously the only option was to create a pipe or an ipc channel. This
patch makes it possible to inherit a handle that

windows: allow specifying FDs to be inherited by a child process

Previously the only option was to create a pipe or an ipc channel. This
patch makes it possible to inherit a handle that is already open in the
parent process. There is also room for setting more than just stdin,
stdout and stderr, although this is not supported yet.

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unix, windows: rework reference counting scheme

This commit changes how the event loop determines if it needs to stay alive.

Previously, an internal counter was increased whenever a

unix, windows: rework reference counting scheme

This commit changes how the event loop determines if it needs to stay alive.

Previously, an internal counter was increased whenever a handle got created
and decreased again when the handle was closed.

While conceptually simple, it turned out hard to work with: you often want
to keep the event loop alive only if the handle is actually doing something.
Stopped or inactive handles were a frequent source of hanging event loops.

That's why this commit changes the reference counting scheme to a model where
a handle only references the event loop when it's active. 'Active' means
different things for different handle types, e.g.:

* timers: ticking
* sockets: reading, writing or listening
* processes: always active (for now, subject to change)
* idle, check, prepare: only active when started

This commit also changes how the uv_ref() and uv_unref() functions work: they
now operate on the level of individual handles, not the whole event loop.

The Windows implementation was done by Bert Belder.

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test: clean up test-stdio-over-pipes

windows: Enable passing of TCP connections over IPC

test: fix warning: implicit declaration of function ‘memcmp’

windows: stdio over non-overlapped pipes