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The filter is build into libxs rather than being a plug-in.
It's ID is XS_FILTER_TOPIC.
The filter assumed that the messages are text-based and consider
binary 0 to be a delimiter separating message topic from the message
body. Use of the delimiter is not mandatory though. If binary zero
is not present, whole message is used for matching.
The topic is separated into elements using dots, e.g.
"animals.dogs.fluffy".
Subscriptions match individual elements. Each element can be matched
by either literal string or a wildcard (*), for example:
"animals.*.fluffy" matches all animals called Fluffy irrsepctive
of whether they are dogs, cats or whatever.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Implements the SP wire protocol, and infrastructure for legacy wire
protocol support.
Also added an XS_SERVICE_ID socket option to set the service id and renamed
the XS_PROTOCOL option to XS_PATTERN_VERSION.
The following pattern versions are supported:
PAIR: v3
PUBSUB: v1 (legacy), v4
REQREP: v2
PIPELINE: v3
SURVEY: v2
Note that all existing pattern versions have been bumped by 1 to allow for
use of legacy protocols (otherwise there would be no way to distinguish
between e.g. PUBSUB v3 and PUBSUB v3 using SP).
Signed-off-by: Martin Lucina <martin@lucina.net>
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=668550)
Signed-off-by: Martin Lucina <martin@lucina.net>
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Up to now, when survey in surveyor pattern expired, xs_recv()
returned EAGAIN. That made it impossible to distinguish
epired survey from expired receive timeout (XS_RCVTIMEO).
This patch make errors different in both cases.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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So far, the event used for signaler creation was local to the session,
so, in theory, processes in two different sessions could accidentally
interconnect their signalers.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>
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If plugin directory doesn't exist, is a file or
user has no permissions to access it, the plugins
are not loaded.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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When more then one peer connected to a PAIR socket,
an application aborted due to assertion failure.
This patch changes the PAIR socket behaviour so that
it rejects any further connection requests.
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Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>
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Previously the code used for loading plug-ins would be built only on
Linux hosts. Now the required functions are checked for and plug-in
loading code is enabled if those are present on all platforms. Using
lstat() to check for file types also increases portability to hosts that
do not have the dirent.d_type field. If shared libraries support is
disabled plug-ins will also be automatically disabled.
Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>
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Accidentally, one of the sockets in Windows signaler_t
was opened usign WSASocket instead of xs::open_socket.
That skipped the standard XS socket initialisation
and caused the socket to be inheritable to the child
processes.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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The decoder did not properly decode large messages
on systems where sizeof (size_t) < sizeof (uint64_t).
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When HWM was set to small value it may have happened that command
indicating that pipe is ready for writing wasn't processed
because of command throttling.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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When processing commands with throttling switched off, RDTSC
instruction was executed, but the result was never used. This
patch eliminates the unneeded instruction.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This patch fixes a bug in the message encoder which was
responsible for computing incorrect message offset.
The bug affected PGM receiver making it unable to
decode inital messages.
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On Windows and OpenVMS there is no IPC transport. This patch fixes the
problem introduced by previous patches, where the fact is not taken
into account.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This prevents the long-standing issue of an invalid pgm or epgm connection
string from causing an assert when the connection is attempted and fails.
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This patch reintroduces the behaviour that if a tcp:// or ipc:// connection
string which is invalid is passed to xs_connect, then an error is reported,
instead of asserting at connection time
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EAGAIN was being used as a translation value for EINPROGRESS, thus
shadowing a real EAGAIN return value from the OS. This caused later
assertions of "Invalid argument" in stream_engine.cpp when it attempted to
use a socket which was not connected.
I also add EINTR to mean EINPROGRESS, as per the POSIX and FreeBSD
documentation which specifies that a connect() call interrupted due to a
signal will complete asynchronously.
Signed-off-by: Martin Lucina <martin@lucina.net>
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Feature checks are introduced to check for all the headers required by
the select() and poll() calls. Include files are then included
conditionally without the use of any OS-specific directive. The change
also fixes a couple of problems:
- Fixed compilation under FreeBSD, NetBSD and OpenBSD when forcing the
use of select() in the poller
- Quieted a warning mixed-sign comparison warning on FreeBSD caused by
FD_SETSIZE being declared as an unsigned constant on that OS
- Removed the obsolescent AC_HEADER_TIME macro from the configure script
Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>
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This reverts commit 512f3a604924fec9d89e2b4bfd6f73aa66309fa7.
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The commands was a vestige of the removed 'durable sockets' feature
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Paul Colomiets <paul@colomiets.name>
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Implements SP protocol versioning, legacy protocol support, and the
following pattern protocol versions:
PAIR: v2
PUBSUB: v1 (legacy), v3
REQREP: v1
PIPELINE: v2
SURVEY: v1
Engine support is only for stream_engine_t at this stage.
Signed-off-by: Martin Lucina <martin@lucina.net>
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When socket in the process of asynchronous connect is being closed
and the fact that there is no peer is found out at the same time
close() may return ECONNRESET. This patch handles this situation
decently.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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As per Patrick Trantham comment
http://groups.crossroads.io/r/topic/510xaadGgWVcXFdATnhAuN
the GCC __sync_*() builtins are more generic but slower than specialized
hand-written assembly for armv7a case.
Therefore, the code is reordered for prefer inline assembly for armv7a
over GCC builtins.
* src/atomic_counter.hpp:
(atomic_counter_t::add):
(atomic_counter_t::sub):
* src/atomic_ptr.hpp:
(atomic_ptr_t::xchg):
(atomic_ptr_t::cas):
Prefer armv7a specific inline asm over GCC __sync_*() builtins.
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* configure.ac:
Check for working Solaris/NetBSD-style atomic.h independly on OS.
Add check for GCC-style __sync_*() builtins.
New defines: XS_ATOMIC_GCC_SYNC, XS_ATOMIC_SOLARIS.
Removed define: XS_FORCE_MUTEXES.
* src/atomic_counter.hpp:
(atomic_counter_t::add):
(atomic_counter_t::sub):
* src/atomic_ptr.hpp:
(atomic_ptr_t::xchg):
(atomic_ptr_t::cas):
Use result of these checks.
Preference order:
1. GCC-style __sync_*() builtins
2. Inline asm (x86, x86-64, armv7a)
3. Solaris/NetBSD-style atomic.h, Windows-specific API
4. Fallback to mutex-based implementation
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Use GCC __sync_*() builtins when compiler claims to be GCC (GCC itself,
Clang...)
It can be disabled explicitly by using XS_DISABLE_GCC_SYNC_BUILTINS
define. Just for any case.
* src/atomic_counter.hpp [__GNUC__ && !XS_DISABLE_GCC_SYNC_BUILTINS]:
(atomic_counter_t::add):
(atomic_counter_t::sub):
* src/atomic_ptr.hpp [__GNUC__ && !XS_DISABLE_GCC_SYNC_BUILTINS]:
(atomic_ptr_t::xchg):
(atomic_ptr_t::cas):
Prefer GCC __sync_*() builtins over inline asm.
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This commit implements atomic operations for the armv7a architecture
using gcc inline assembly. This offers higher performance compared to
pthread mutexes.
Tested on an am3517 evm, clocked at 600MHz:
./inproc_thr 200 1000000
------------------------
53-60K messages / sec, pthread mutexes
73-90K messages / sec, assembly atomic ops
./inproc_lat 200 1000000
------------------------
average latency: 42.234 [us], pthread mutexes
average latency: 35.496 [us], assembly atomic ops
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This patch is based on patch by Martin Hurton from 0MQ project.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This patch is a preliminary work for mergine TCP and IPC connecters
and listeners. The ultimated goal is to avoid code duplication
occuring in these classes.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Optimisation. Up to now new fd_set was initialised in
each signaler_wait call. Now the fd_set is initialised
once when signaler is created. This is useful espacially on
Windows where fd_set is list of pointers rather than bitset
and thus can be rather large.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This patch provides a single place for selecting polling mechanisms
(polling.hpp). Up to now the selection was spread among the build
system and several source files.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This patch allows for partial shutdown of the socket.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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SURVEYOR socket now uses clock instance from socket_base_t
for measuring survey timeout. This allows for better performance
in tight xs_recv() loops.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This fixes a critical bug in zmq_getsockopt.
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This patch instantiate a clock_t instance for each XS
socket. Thus, it is shared between subsequent calls
to xs_recv (and xs_send). That in turn significantly
limits the number of invocations of getimeofday (or similar)
when timeouts are used and recv/send is called in a
tight loop.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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This is an optimisation. The idea is that when surveyor disappears
it makes no sense to process any surveys it have sent. There are
two cases handled:
- when (X)SURVEYOR socket is closed any unsent outbound messages
are discarded
- when (X)RESPONDENT detects that its peer have disconnected it
drops any unprocessed messages that have been received from it
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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It can be used to timeout the survey. Value is in milliseconds
and -1 means infinite (default).
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Survey pattern is "multicast with reply". There are two roles:
surveyor and respondent. Surveyor publishes a survey which gets
delivered to all connected respondents. Each repondent can send
a response to the survey. All the responses are delivered to
the original surveyor. Once the surveyor decides that the survey
is over (e.g. deadline was reached) it can send initiate survey.
Late responses from old surveys are automatically discarded by
the surveyor socket.
Socket types: SURVEYOR, XSURVEYOR, RESPONDENT, XRESPONDENT
Patch also includes a test program with surveoyr, two respondents
and an intermediary device.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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- couple of comments adjusted
- empty 'stack delimiter' message correctly closed
- non-reachable function xrep_t::rollback() removed
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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