This implements locking around the blocking call to ReadFile to get
around a Windows kernel bug where a blocking ReadFile operation on a
stream can deadlock the thread. This allows uv_read_stop to immediately
cancel a pending IO operation, and allows uv_pipe_getsockname to
"pause" any pending read (from libuv) while it retrieves the
sockname information.
If unsupported by the OS (pre-Vista), this reverts to the old
(e.g. deadlock-prone) behavior
Closes#1313
This is the libuv side of the fix for Node's cluster module on Windows.
https://github.com/joyent/node/issues/7691
Windows and Unix return certain socket errors (i.e. EADDRINUSE) at
different times: bind on Windows, and listen on Unix.
In an effort to hide this difference, libuv on Windows stores such
errors in the bind_error field of uv_tcp_t, to defer raising it at
listen time.
This worked fine except for the case in which a socket is shared in
a Node cluster and a bind error occurs.
A previous attempt to fix this (
d1e6be14603da36fe00e
) was flawed becaused in an attempt to relay the error at the JS level
it caused the master to start accepting connections.
With this new approach, libuv itself is relaying the bind errors,
providing for a uniform behavior of uv_tcp_listen.
This functionality is present in stream and uv_udp_t has a queue
as well so it makes sense for udp to have a send_write_size.
Since udp sends entire messages atomically, the send_queue_count field
lets the user determine how many messages are there left to send.
We add a function called uv_loop_size which returns the size of
the loop. It is an additional function which complements
`uv_handle_size` and` uv_req_size` in order to provide full FFI
support.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Add some basic doc comments to the uv_barrier_*() functions and document
the "serializer" return value from the previous commit.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Make uv_barrier_wait() return a boolean value indicating whether this
thread was the "serializer".
From `man pthread_barrier_wait`:
Upon successful completion, the pthread_barrier_wait() function
shall return PTHREAD_BARRIER_SERIAL_THREAD for a single (arbitrary)
thread synchronized at the barrier and zero for each of the other
threads.
Exposing that information from libuv is useful because it can make
cleanup significantly easier:
if (uv_barrier_wait(&barrier) > 0)
uv_barrier_destroy(&barrier);
Signed-off-by: Fedor Indutny <fedor@indutny.com>
The fields for UV_HANDLE_PRIVATE_FIELDS in uv-win.h and uv-unix.h are
the same, but in different order. Simply swap them so uv_handle_t are
the same on both platforms.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Changes since version 0.11.22:
* fs: avoid using readv/writev where possible (Fedor Indutny)
* mingw: fix build with autotools (Saúl Ibarra Corretgé)
* bsd: support IPv6 qualified link-local addresses (Saúl Ibarra Corretgé)
* unix: add UV_HANDLE_IPV6 flag to tcp and udp handles (Saúl Ibarra Corretgé)
* unix, windows: do not set SO_REUSEADDR by default on udp (Saúl Ibarra
Corretgé)
* windows: fix check in uv_tty_endgame() (Maks Naumov)
* unix, windows: add IPv6 support for uv_udp_multicast_interface (Saúl Ibarra
Corretgé)
* unix: fallback to blocking writes if reopening a tty fails (Saúl Ibarra
Corretgé)
* unix: fix handling uv__open_cloexec failure (Saúl Ibarra Corretgé)
* unix, windows: add IPv6 support to uv_udp_set_membership (Saúl Ibarra
Corretgé)
* unix, windows: removed unused status parameter (Saúl Ibarra Corretgé)
* android: add support of ifaddrs in android (Javier Hernández)
* build: fix SunOS and AIX build with autotools (Saúl Ibarra Corretgé)
* build: freebsd link with libelf if dtrace enabled (Saúl Ibarra Corretgé)
* stream: do not leak `alloc_cb` buffers on error (Fedor Indutny)
* unix: fix setting written size on uv_wd (Saúl Ibarra Corretgé)
Signed-off-by: Fedor Indutny <fedor@indutny.com>
