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.
Before this commit, creating an event loop, starting a timer and
calling uv_run(UV_RUN_ONCE) blocked in uv_run() until the timer
expired - but didn't actually run the timer.
Fix a buglet where uv_read_stop() would mark the handle as stopped even
when there are in-progress write requests.
This bug is unlikely to have affected anyone, the only case where it
has a user-visible effect is when:
a) the handle has been stopped for reading but not writing, and
b) it's the last active handle in the event loop's pollset
If both conditions are met, it's possible for the event loop to
terminate prematurely.
This reapplies commit 80f2f82 which was temporarily reverted in fe7b154
because it was making a lot of node.js tests fail on OS X with the
following assertion:
Assertion failed: (!uv__is_active(handle)), function
uv__finish_close, file ../../deps/uv/src/unix/core.c, line 165.
Expecting that the handle is inactive when the state is UV_CLOSING
turns out to be a bad assumption: it's possible that the handle is
executing (for example) a shutdown request when uv__finish_close()
is called. That's okay, uv__stream_destroy() takes care of that.
The issue wasn't specific to OS X, it was just more visible on that
platform. (Slow) debug builds on Linux exhibited the same behavior.
Fix the following two warnings:
src/unix/core.c:74:1: warning: ISO C90 forbids array
'static_assert_failed' whose size can't be evaluated [-Wvla]
src/unix/core.c:76:1: warning: ISO C90 forbids array
'static_assert_failed' whose size can't be evaluated [-Wvla]
* Make uv_stop() work when libuv is embedded in another event loop.
* Fix a small bug where loop->stop_flag was not reset when mode ==
UV_RUN_ONCE or UV_RUN_NOWAIT. The next call to uv_run() would return
immediately without doing any work.
Don't add the io watcher to the watcher queue if the requested change
is effectively a no-op, that is, when the event mask doesn't change.
The exception here is sunos because the event ports backend requires
that watched file descriptors are re-added on every turn of the event
loop.
This commit is a micro-optimization, it does not change the event
loop's observable behavior in any way.
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.
`#if FOO` (where FOO is undefined) is a legal construct in C89 and C99
but gcc, clang and sparse complain loudly about it at higher warning
levels.
Squelch those warnings. Makes the code more consistent as well.
Fixes a bug where timers expire prematurely when the following
conditions hold:
a) libuv first spends some time blocked in the platform poll function
b) a callback then calls uv_timer_start()
Cause: uv_timer_start() uses an out-of-date loop->time in its
'when should the timer callback run?' calculations.
Solution: Update loop->time before invoking any callbacks.
Fixes#678.
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.
Allows for running the event loop in 3 modes:
* default: loop runs until the refcount drops to zero
* once: poll for events only once and block until one is handled
* nowait: poll for events only once but don't block if there are
no pending events
Fix a rather obscure bug where the event loop stalls when an I/O watcher is
stopped while an artificial event, generated with uv__io_feed(), is pending.
This can be used in conjuction with uv_run_once() to poll in one thread and run
the event loop's event callbacks in another.
Useful for embedding libuv's event loop in another event loop.
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.
Finalization of closed handles and associated requests was sometimes delayed
until an external event (network I/O, timeout, etc.) happened. This commit
addresses that.
* replace libev backed timers with a pure libuv implementation
* gut ev_run() and make it take a timeout instead of flags
Incidentally speeds up the loop_count_timed benchmark by about 100%.
Makes the uv__io code a little more obscure but has the advantage that
sizeof(uv__io_t) == sizeof(ev_io), i.e. the sizes of embedding handles
don't change.
The new idle watcher was temporarily disabled in 073a48d due to some semantic
incompatibilities with the previous implementation. This commit resolves those
issues and reactivates the new implementation.
One outstanding bug is that idle watchers can run in a different order
(relative to other handle types) than the old implementation, e.g. (timer, idle)
instead of the expected (idle, timer). This will be fixed in an upcoming commit.
Don't block in epoll_wait() / kevent() / etc. syscall unless there are active
handles. If there are only active requests, do a non-blocking poll.
Likewise, don't run the prepare and check watchers unless there are active
handles *or* requests.
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.
Remove the next_watcher and replace it with a linked list. Said list is named
endgame_handles (because the uv-win calls it that) and contains all the handles
that are in the UV_CLOSING state.
The goal of this commit is two-fold:
a) remove a dependency on libev, and
b) share more code with uv-win in the future
A nice side effect is that it shaves a few bytes off a uv_handle_t.
Detaching doesn't work yet, the setsid() call fails and leaves the child process
attached to the parent's session.
Revert "test: Add test case for spawning detached child processes."
Revert "win: Implement options.detached for uv_spawn() for Windows."
Revert "unix: Implement options.detached for uv_spawn() for unix."
Revert "Add "detached" member to uv_process_options_t to denote whether a child
process should spawn detached from its parent."
This reverts commit ea9baef95c.
This reverts commit e99fdf0df6.
This reverts commit 149d32cb96.
This reverts commit b3e0ad4db8.
Previously, a new inotify fd was created for each watcher, making it quite easy
to run into the system-wide fs.inotify.max_user_instances limit (usually 128).
Fixes#300.
Linux 2.6 always closes the file descriptor, even on EINTR. Retrying the close()
call isn't merely useless, it's actively harmful - the file descriptor may have
been acquired by another thread.
