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Threads contain message queues and dispatch queued messages in their
event loop, in Thread::exec(). This mechanism prevents the main thread
from dispatching messages as it doesn't run Thread::exec().
Fix this by moving message dispatching from Thread::exec() to
EventDispatcher::processEvents().
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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processing
An event notifier may be unregistered from its activated signal. This
can cause the notifiers set entry in notifiers_ to be deleted while
processNotifiers() is looping over the notifiers_ map, leading to
problems.
To fix this, add a flag to the EventNotifierPoll class to indicate that
event processing is in progress. If the flag is set, the notifiers_
entry is not deleted during notifier unregistration, but will be deleted
by the event processing loop.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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When using -std=c++11, GCC versions 6.2 and 6.3 take objection to
declaring a struct type when using a range based iterator:
event_dispatcher_poll.cpp:231:13: error: types may not be defined
in a for-range-declaration [-Werror]
for (const struct pollfd &pfd : pollfds) {
^~~~~~
cc1plus: all warnings being treated as errors
Removing the keyword 'struct' ensures that the compiler does not try to
declare the type, and instead uses the type as already defined by the
relevant poll.h header.
This issue does not affect later compiler versions.
Reported-by: [autobuild.buildroot.net] Thomas Petazzoni <thomas.petazzoni@bootlin.com>
http://autobuild.buildroot.net/results/f6dd4c60c04892c8b1669e6000fce7edb2b6349e/
Fixes: 8356f8a6ab87 ("libcamera: Add a poll-based event dispatcher")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The glibc read() and write() functions are defined with the
__warn_unused_result__ attribute when using FORTIFY_SOURCE. Don't ignore
their return value.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add missing parentheses to fix a bitwise test.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Include the header file corresponding to the source file in the very
first position. This complies with the Google C++ coding style
guideliens, and helps ensuring that the headers are self-contained.
Three bugs are already caught by this change (missing includes or
forward declarations) in device_enumerator.h, event_dispatcher_poll.h
and pipeline_handler.h. Fix them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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The new interrupt() function allows interrupting in-progress blocking
processEvents() calls. This is useful to stop running event loops.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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The ppoll() call can be interrupted if a signal is delivered. Handle the
EINTR error code gracefully by restarting the call. This fixes the
event-dispatcher test failure.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Use log categories in the whole existing code base.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Correct the spelling of 'notifiers'.
Fixes: 8356f8a6ab87 ("libcamera: Add a poll-based event dispatcher")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The EventDispatcherPoll::processNotifiers() function doesn't modify the
argument it receives, make it const.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Provide a poll-based event dispatcher implementation as convenience for
applications that don't need a custom event loop. The poll-based
dispatcher is automatically instantiated if the application doesn't
provide its own dispatcher.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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